User:Bkell/ƒ aperture

This is a classification of the Google results for ƒ aperture on 17 January 2009, according to whether the page is using the symbol ƒ in the photography terms ƒ-number or ƒ-stop, or in the ƒ/ notation. On that particular day, Google reported "Results 1 - 10 of about 12,400 for ƒ aperture," though this list, which is complete, shows there were actually many fewer results than that. Remember: Google result counts are a meaningless metric.

I have tried to group together pages which are identical, nearly identical, or from the same source, though obviously I was not able to keep all of these pages in mind simultaneously, so this list may contain essentially duplicate pages listed more than once.

This is not meant to be an endorsement of any of these pages as a reliable source, nor is the count meant to be particularly meaningful. Also note that this list itself is original research, so it cannot be cited as a source in a Wikipedia article.

Results that use ƒ for f-number or f-stop
These pages seem to use ƒ for f-number or f-stop, or in the f/ notation, in at least one instance:


 * 1) http://www.ewave.ae/cctv_glossary_of%20_terms.htm
 * 2) http://www.proactivecreations.com.au/blog.html
 * 3) Photo pages created by Apple Aperture:
 * 4) *http://www.peguis.ca/angus/large-1.html
 * 5) *http://www.dandelionfly.com/large-5.html — file not found, but Google cache shows it was Aperture-made
 * 6) *http://www.e-prattville.com/E-Prattville%202008%20Galleries/Firearms%20Familiarization%20Classes%20Summer%202008/large-1.html
 * 7) *http://www.e-prattville.com/E-Prattville%202008%20Galleries/Firearms%20Familiarization%20Classes%20Summer%202008/large-5.html
 * 8) *http://www.houseofstauss.com/images/storm/icestorm07/large-6.html
 * 9) *http://www.iciclesoftware.com/WBAChevak/large-1.html
 * 10) *http://www.landliving.com/caboom5/creativelivingspace/large-8.html
 * 11) *http://www.limerigger.com/London%20Trip/large-2.html
 * 12) *http://www.louisegelderblom.com/Totem%20Web%20Page/large-1.html
 * 13) *http://homepage.mac.com/anitamedal/SavioMemorial12/large-2.html
 * 14) *http://nullmaster.com/weddingstuff/lakeoakmeadows/large-55.html
 * 15) *http://www.piotrmorawski.com/mountainphotography/2008_GII/large-13.html
 * 16) *http://www.rickthurmond.com/Margit/Margits%20Yellowstone/large-11.html
 * 17) *http://www.robdecarlo.com/Aperture/OurWedding/large-332.html
 * 18) *http://www.tahoe360.com/holidayonice08/large-2.html
 * 19) *http://www.ukrainiansportclub.com/PhotoGallary/USCMensOpen2007/large-1.html
 * 20) *http://www.weasner.com/oracle_observatory/oo-7mar08/large-9.html
 * 21) *http://www.uni-duisburg-essen.de/~hn213me/mt/abs08/large-3.html
 * 22) *http://shiloh.as.arizona.edu/~tjm/LBTI/Aligning_and_Drilling/large-2.html
 * 23) *http://csma31.csm.jmu.edu/physics/html/Dept_Picnic/fall%20picnic%202008/large-10.html
 * 24) *http://ssli.ee.washington.edu/people/nomad/B011A%2090%20degree%20rotation/large-12.html
 * 25) *http://www.orbital.ee/greenscreen/large-5.html
 * 26) *http://www.cs.helsinki.fi/u/pohjalai/SOA/large-2.html
 * 27) *http://www.zuhblptsprh.hr/Galerija/Medjugorje-2008/large-14.html
 * 28) *http://iparigrafika.hu/fotok/nikonteszt2/large-44.html
 * 29) *http://ivady.hu/bakonyi_kirandulas_2008-10-11/large-14.html
 * 30) *http://ivady.hu/bakonyi_kirandulas_2008-10-11/large-16.html
 * 31) *http://pkukmweb.ukm.my/~pptp/frasers/Farizan/large-9.html
 * 32) *http://www.hilltoplancers.org/pix/bbcalexico/large-20.html — Google cache shows ƒ/6.3, though the ƒ is messed up on the current page
 * 33) *http://www.hkba.org/events/gallery/bar_mess2008/large-21.html
 * 34) *http://raytheon9.org/Belfast-Week-2/large-12.html
 * 35) *http://seattle.sawe.org/international/pictures-white/large-20.html
 * 36) *http://www.sb-outdoors.org/Galleries/GapFire3/large-4.html
 * 37) *http://www.sstx.org/studentlife/large-3.html
 * 38) *http://www.wunderwelten.org/gallery_FN08/WunderWelten_FR08/large-7.html
 * 39) *http://www.confuciusinstitute.se/languagecafe/large-1.html
 * 40) *http://www.petar.se/large-1.html
 * 41) *http://www.chrono.qub.ac.uk/instar/instarPics/large-7.html
 * 42) *http://www.ustwo.co.uk/photos/trevenna/large-2.html
 * 43) *http://hhs.suhsd.k12.ca.us/pix/homecoming08/large-4.html — Google cache shows ƒ/5.6, though the ƒ is messed up on the current page
 * 44) *http://www.amherst.k12.oh.us/ajh/images/doordecorating/large-1.html
 * 45) http://members.shaw.ca/ocl3/technical1.html
 * 46) http://hyperion.cc.uregina.ca/~szymanss/uglabs/p242/Experiments/EXPT3.pdf
 * 47) http://www.erwinmulyadi.co.cc/2008/09/nikon-18-105mm-lens-review.html
 * 48) http://www.vblank.ch/articles/lens-review-50/index-e.html
 * 49) http://www.a-digital-eye.com/MinoltaE323.html
 * 50) http://graphicssoft.about.com/library/tuts/rl/ucrl01-dof.htm
 * 51) http://aphotolog.com/index.php?s=ahu
 * 52) http://apostrophestudios.com/resources/
 * 53) http://www.articlesbase.com/photography-articles/learn-how-to-succeed-with-the-most-difficult-task-in-jewelry-photography-427151.html
 * 54) http://www.berk-edu.com/BAS_subsite/PDF_bas/BASICassignments_S06.pdf
 * 55) http://rising.blackstar.com/macro-photography-the-magic-of-nuance.html
 * 56) *http://deadsailorproductions.blogspot.com/2008/09/iso-test-d90-d300-d700.html
 * 57) *http://deadsailorproductions.blogspot.com/2008/09/nikon-d90-hands-on-preview.html
 * 58) *http://theonlinephotographer.blogspot.com/2005/12/variable-aperture-zooms-fear-no-longer.html
 * 59) *http://theonlinephotographer.blogspot.com/2006/05/top-endorses-tamron-17-35mm-284.html
 * 60) *http://forum.lowyat.net/topic/776090/+20 — quotes theonlinephotographer.typepad.com, hidden in a spoiler box
 * 61) *http://theonlinephotographer.typepad.com/the_online_photographer/2008/04/the-smc-pentax.html
 * 62) *http://theonlinephotographer.typepad.com/the_online_photographer/2008/11/diffractionquan.html
 * 63) *http://www.cameralabs.com/forum/viewtopic.php?p=78634
 * 64) *http://www.cameralabs.com/forum/viewtopic.php?p=92981&sid=dadc9e0a565f4cc73c16aaf27994e556
 * 65) http://www.cameratown.com/reviews/review_listing.cfm/hurl/id%7C4284
 * 66) http://repositories.cdlib.org/cgi/viewcontent.cgi?article=4915&context=lbnl
 * 67) http://www.christopherjames-studio.com/materials/The%20Book%20of%20Alt%20Photo%20Processes/SAMPLE%20CHAPTERS/PinholeSm.pdf
 * 68) *http://www.cinemaminima.com/index.php/tag/flickr/
 * 69) *http://www.cinemaminima.com/index.php/tag/improvisation/
 * 70) http://www2.cloznet.com/idcfm/issues/2006/09/art8/art8.pdf
 * 71) *http://www.creativepro.com/article/ooohh-aaahh-tips-on-photographing-fireworks
 * 72) *http://www.nyip.com/ezine/holidays/digfirewks.html
 * 73) *http://www.sctxphotographyclub.org/technicaltopics/new_york_institute_of_photography_tips_better_photographs_fireworks.pdf
 * 74) *http://www.cvilaser.com/Common/PDFs/Multi-Element_Lenses_Discussion.pdf
 * 75) *http://www.tsukasa-tec.co.jp/documents/APMQ_000.pdf
 * 76) *http://www.tsukasa-tec.co.jp/documents/APM_000.pdf
 * 77) http://davidcelis.com/
 * 78) http://www.digitalcamerainfo.com/d/Blog&page=2&tag=Nikon.htm
 * 79) *http://www.digitalphotopro.com/gear/in-focus/may-june-2006.html
 * 80) *http://www.digitalphotopro.com/gear/lenses/fast-lenses-on-sub-full-frame-sensors.html?start=1
 * 81) *https://www.dpchallenge.com/forum.php?action=read&FORUM_THREAD_ID=153905&page=1#1074259
 * 82) *https://www.dpchallenge.com/forum.php?action=read&FORUM_THREAD_ID=87554
 * 83) http://www.dphotojournal.com/how-to-shoot-fireworks/
 * 84) *http://forums.dpreview.com/forums/read.asp?forum=1000&message=30364724
 * 85) *http://forums.dpreview.com/forums/read.asp?forum=1037&message=30570991
 * 86) http://www.dptutorial.com/glossary
 * 87) http://ericschmiedl.com/hacks/large-142.html
 * 88) http://www.f2freelancephotographer.com/features/Pentax%20K100D.pdf
 * 89) http://www.facebook.com/topic.php?uid=6158898850&topic=5862
 * 90) http://blog.florian-knorn.com/
 * 91) http://www.fredmiranda.com/reviews/showproduct.php?product=131
 * 92) http://www.georgehernandez.com/h/xzMisc/Photography/Default.asp
 * 93) http://petroszeglis.googlepages.com/home
 * 94) http://www.groupmedia.com/photocourse/images/Flash.pdf
 * 95) http://blog.h2meyer.com/2008/03/extreme-cuteness-alert.html
 * 96) http://www.hotbuyselectronics.com/fuji_gw_670_iii_medium_format_camera.htm
 * 97) htt p://www.how cast.com/guides/1046-How-To-Choose-Your-Aperture-Setting — blacklisted by Wikipedia
 * 98) http://hyperphocal.com/?p=99
 * 99) http://www.ianwallington.com/article4.html
 * 100) *http://www.iceskatingworld.com/coachcorner/monthlyarticles/topic_arena0301.html
 * 101) *http://www.nyip.com/ezine/sports/beeballhockey.html
 * 102) http://www.imaging-resource.com/NEWS/1207497678.html
 * 103) These quote SLRgear.com:
 * 104) *http://itemsearch.com/index.cfm
 * 105) *http://www.neutralday.com/
 * 106) *http://www.studiolighting.net/slr-gear-review-canon-800mm-f56l-is-usm-super-telephoto-lens/
 * 107) http://janinewhite.com/Documents/Photography.pps
 * 108) http://www.jollinger.com/photo/meters/meters/watkins_bee.html
 * 109) http://www.jsw-photo.com/articles/sigma28-300/index.html
 * 110) http://justinblackphoto.com/bag_content.shtml
 * 111) *http://justintadlock.com/archives/2008/04/13/cleaner-wordpress-gallery-plugin
 * 112) *http://wordpress.org/support/topic/173578
 * 113) http://www.kodak.com/global/en/consumer/products/pdf/e88.pdf
 * 114) *http://www.kosi.com/Raman_Spectroscopy/holoSpecf18.php?ss=600
 * 115) *http://www.kosi.com/Raman_Spectroscopy/holoSpecf18i.php?ss=600
 * 116) http://www.lensbaby.com/reviews/digital_video_pro_02.pdf
 * 117) http://www.luminous-landscape.com/columns/sm-mar-05.shtml
 * 118) http://www.mac-forums.com/forums/images-graphic-design-digital-photography/129669-those-confused-about-aperture-shutter-speed.html
 * 119) *http://forums.macrumors.com/archive/index.php/t-179436.html
 * 120) *http://forums.macrumors.com/showthread.php?t=551443
 * 121) http://www.madewira.com/tutorial/
 * 122) *http://forum.manualfocus.org/viewtopic.php?id=12365
 * 123) *http://forum.manualfocus.org/viewtopic.php?id=9298
 * 124) https://mhprofessional.com/downloads/products/0071472487/0071472487_chap11.pdf
 * 125) http://www.modelmayhem.com/491735
 * 126) http://www.mybloglog.com/buzz/topics/randompix — nothing currently, but Google cache shows usage of ƒ/2.8, ƒ/2, ƒ/5.6, etc. by david.smeaton
 * 127) *http://www.myfourthirds.com/document.php?id=4008&class=Poll
 * 128) *http://www.myfourthirds.com/document.php?id=8486
 * 129) http://www.nature.com/nature/journal/v179/n4556/abs/179435a0.html
 * 130) *http://www.outdoorphotographer.com/gear/lenses/fast-lenses.html?start=1
 * 131) *http://www.outdoorphotographer.com/gear/more-gear/short-reports/sigma-105mm-28-dg-macro-and-ef-500-dg-super-flash.html
 * 132) *http://www.pcphotomag.com/component/zine/article/264.html
 * 133) *http://www.pcphotomag.com/hardware/computers/tele-zooms.html
 * 134) http://www.pentaxforums.com/forums/pentax-slr-lens-discussion/35270-da35-2-8-photozone-de-3.html
 * 135) http://www.phogulum.com/
 * 136) http://photoboxr.com/Greg/
 * 137) http://www.photoformulary.com/images/2007Newsletters/webSeptember2007NL.pdf
 * 138) *http://forums.photographyreview.com/showthread.php?t=34564
 * 139) *http://www.photographyreview.com/cat/lenses/35mm-primes/nikon/PRD_289852_3111crx.aspx
 * 140) *http://www.photographytips.com/page.cfm/2011
 * 141) *http://www.photographytips.com/page.cfm/468
 * 142) http://photokenosha.com/files/OOF2.6.pdf
 * 143) http://www.photonics.com/Content/ReadArticle.aspx?ArticleID=16676
 * 144) http://www.photosnews.com/categories/Lenses/Other/
 * 145) *http://www.phototechmag.com/articles/articles/200705/0403Bond_Reciprocity2.pdf
 * 146) *http://www.phototechmag.com/previous-articles/jul-dubler99.htm
 * 147) http://forums.popphoto.com/camera/board/message?board.id=14&thread.id=3148 — URL doesn't work, but Google's cache shows a usage of ƒ/16
 * 148) *http://quantumlenscap.com/
 * 149) *http://quantumlenscap.com/2008/12/28/thirty-five-is-the-new-fifty/
 * 150) *http://www.redwop.com/download/fluphoto.pdf
 * 151) *http://www.redwop.com/technotes.asp?ID=82
 * 152) http://www.ritzcamera.com/static/articles/tips/photograph-baseball.html
 * 153) http://roaringforkobservatory.com/equipment.html
 * 154) http://www.scenebyhird.com/Downloads/January_2005.pdf
 * 155) http://scotthaefner.com/publications/phototechniques/
 * 156) http://www.shotaddict.com/wordpress/2009/01/02/5472.html
 * 157) http://www.sinarcameras.com/file_uploads/bibliothek/k_87_UserInstructions/155_0_sinarlensesforlargeformatphotography.pdf
 * 158) *http://www.siskinphoto.com/magazine/zpdf/LightBalancing.pdf
 * 159) *http://www.siskinphoto.com/magazine/zpdf/Portrait.pdf
 * 160) *http://www.stanleyleary.com/Newsletters/January%20Newsletter%202007.pdf
 * 161) *http://www.stanleyleary.com/Newsletters/March%20Newsletter%202006%20-%20Making%20Photos%20That%20Pop.pdf
 * 162) http://www.studiointerlude.com/2008_05_01_archive.html
 * 163) http://www.tamron.com/lenses/learning_center/misc_pdfs/OP(long%20lens%20tip).pdf
 * 164) http://www.thephotoforum.com/forum/graphics-programs-photo-gallery/135648-aperture-vs-iphoto.html
 * 165) http://www.tipsfromthetopfloor.com/forum/viewtopic.php?t=13448
 * 166) http://topcamerareview.com/pdf/winter_lesson10.pdf
 * 167) http://www.tribalcog.com/learn/glossary.shtml
 * 168) *http://byronwolfe.typepad.com/cdes_photography/files/WEEK04_CDES206.pdf
 * 169) *http://www.csuchico.edu/~bwolfe/lectures/WEEK07_CDES206.pdf
 * 170) *http://www.vision-systems.com/display_article/291751/19/ARTCL/none/none/Lens-considerations-change-for-large-format-cameras/
 * 171) *http://www.vision-systems.com/articles/article_display.html?id=249975
 * 172) http://www.visionsensorsmag.com/Articles/Article_Rotation/BNP_GUID_9-5-2006_A_10000000000000276438
 * 173) http://www.williamneill.com/pdfs/LightImpressions.pdf
 * 174) http://reddit.wired.com/submissions_macro/?s=top
 * 175) *http://cbartelski.wordpress.com/2008/08/
 * 176) *http://cbartelski.wordpress.com/2008/08/25/lesson-1-aperture-settings-aka-f-stops/
 * 177) *http://answers.yahoo.com/question/index?qid=20070911152804AAbt26i
 * 178) *http://answers.yahoo.com/question/index?qid=20071101124812AAbY0x9
 * 179) *http://www.yashica-guy.com/document/chrono.html
 * 180) *http://www.yashica-guy.com/document/g-manual.html
 * 181) *http://www.youtube.com/watch?v=m_uRbsC5w7s
 * 182) *http://www.youtube.com/watch?v=xKa0cDjdFhs
 * 183) http://martin.ringehahn.de/photoblog/
 * 184) *http://kottan-labs.bgsu.edu/202/Chapter%2025.1-7.ppt
 * 185) *http://www.physics.ucok.edu/wwilson/Courses/PHY1214/Lectures/L28.pdf
 * 186) *http://physics.ucsd.edu/students/courses/summer2006/session2/managed/physics1c/documents/1C_Ch25_082906.pdf
 * 187) *http://physics.ucsd.edu/students/courses/summer2007/session2/managed/physics1c/documents/handouts25.pdf
 * 188) *http://www.phys.ufl.edu/courses/phy2054/fall08/GM_notes/chapter25_v1.pdf
 * 189) *http://classshares.student.usp.ac.fj/PHF03/Lectures/L5.ppt
 * 190) http://extension.oregonstate.edu/catalog/4h/4-h7743.pdf
 * 191) http://www.ubets.pdx.edu/pdf/Photography_Terms_for_Quiz_1.pdf
 * 192) http://www.physics.umd.edu/courses/Phys106/xji/L14.ppt
 * 193) http://silver.neep.wisc.edu/~lakes/HoloColor.pdf
 * 194) *http://cgi.ebay.es/ws/eBayISAPI.dll?ViewItem&item=250334228868
 * 195) *http://photo.net/bboard/q-and-a-fetch-msg?topic_id=23&msg_id=000Arz — ƒ doesn't appear in the current version, but it does in Google's cache, and the current version has blanks in those spots (in Kurt Weiske's post)
 * 196) http://optics.nasa.gov/tech_days/tech_days_2003/docs/54QEDTalkonSSIforNASATechDay.pdf
 * 197) *http://en.mimi.hu/photography/maximum_aperture.html
 * 198) *http://en.mimi.hu/photography/minimum_aperture.html
 * 199) http://hug.phys.huji.ac.il/PHYS_HUG/MAABADA/MABADA_A/Pasco/ci/os-8524/012-05882a/012-05882a.pdf
 * 200) http://javascript-reference.info/photography.htm
 * 201) http://stereo.nrl.navy.mil/cnsrtm/meetings/2002/05_COR1_Davila.pdf
 * 202) http://www.digitalpixels.net/2009/01/photography/what-is-bokeh/
 * 203) http://digitalsnaps.net/program_content.htm
 * 204) *http://fcalc.net/manual/
 * 205) *http://fcalc.net/manual/dof.html
 * 206) *http://blog.founddrama.net/2008/07/aperture/
 * 207) *http://blog.founddrama.net/2008/11/6-months-of-dslr-action/
 * 208) http://www.iitec.net/upload/Brochures/MIRICLE_110K_XTi.pdf
 * 209) http://www.lightcafe.net/forums/viewtopic.php?f=31&t=8476
 * 210) http://www.lightroomforums.net/showthread.php?t=1196
 * 211) *http://photography-on-the.net/forum/showthread.php?t=285301
 * 212) *http://photography-on-the.net/forum/showthread.php?t=573024
 * 213) *http://www.telescope-optics.net/lens_corrector_examples.htm
 * 214) *http://www.telescope-optics.net/sub_aperture_corrector.htm
 * 215) *http://www.tutorial9.net/photography/exposure-camera-modes/
 * 216) *http://www.tutorial9.net/photography/photography-basics/
 * 217) http://www.super8.nl/7276.pdf
 * 218) http://ithelp.lincoln.ac.nz/site/story_images/2159_fnumbers_s5783.pdf
 * 219) http://www.brayebrookobservatory.org/BrayObsWebSite/HOMEPAGE/forum/choosing_a_first_telescope.pdf
 * 220) http://www.mmto.org/MMTpapers/pdfs/tm/tm03-8.pdf
 * 221) http://nppa10.org/?p=198
 * 222) http://www.ocastronomers.org/about_oca/Special_Interest_Groups/Beginners_Class/ScopeOptics.pdf
 * 223) http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-5-12-1951
 * 224) http://spie.org/x15889.xml?highlight=x2422&ArticleID=x15889
 * 225) http://www.stecf.org/~rfosbury/home/natural_colour/biochromes/UV_flowers/Forum.pdf
 * 226) http://www.w1ghz.org/antbook/chap4.pdf
 * 227) http://ads.ahds.ac.uk/catalogue/adsdata/cbaresrep/pdf/012/01202001.pdf
 * 228) http://www.bristolcameras.co.uk/images/nikon%20200mm%20vr.pdf
 * 229) http://www.ciao.co.uk/Sigma_50_150_2_8_EX_DC_HSM_APO_Lens__Review_5759101
 * 230) http://www.photoanswers.co.uk/Community-Landing/Forum-Landing/Forum-Categories/Topic/?&topic-id=141177
 * 231) http://www.steveszone.co.uk/storysofar.shtml
 * 232) http://www.kameraklub.co.za/flash.htm
 * 1) http://javascript-reference.info/photography.htm
 * 2) http://stereo.nrl.navy.mil/cnsrtm/meetings/2002/05_COR1_Davila.pdf
 * 3) http://www.digitalpixels.net/2009/01/photography/what-is-bokeh/
 * 4) http://digitalsnaps.net/program_content.htm
 * 5) *http://fcalc.net/manual/
 * 6) *http://fcalc.net/manual/dof.html
 * 7) *http://blog.founddrama.net/2008/07/aperture/
 * 8) *http://blog.founddrama.net/2008/11/6-months-of-dslr-action/
 * 9) http://www.iitec.net/upload/Brochures/MIRICLE_110K_XTi.pdf
 * 10) http://www.lightcafe.net/forums/viewtopic.php?f=31&t=8476
 * 11) http://www.lightroomforums.net/showthread.php?t=1196
 * 12) *http://photography-on-the.net/forum/showthread.php?t=285301
 * 13) *http://photography-on-the.net/forum/showthread.php?t=573024
 * 14) *http://www.telescope-optics.net/lens_corrector_examples.htm
 * 15) *http://www.telescope-optics.net/sub_aperture_corrector.htm
 * 16) *http://www.tutorial9.net/photography/exposure-camera-modes/
 * 17) *http://www.tutorial9.net/photography/photography-basics/
 * 18) http://www.super8.nl/7276.pdf
 * 19) http://ithelp.lincoln.ac.nz/site/story_images/2159_fnumbers_s5783.pdf
 * 20) http://www.brayebrookobservatory.org/BrayObsWebSite/HOMEPAGE/forum/choosing_a_first_telescope.pdf
 * 21) http://www.mmto.org/MMTpapers/pdfs/tm/tm03-8.pdf
 * 22) http://nppa10.org/?p=198
 * 23) http://www.ocastronomers.org/about_oca/Special_Interest_Groups/Beginners_Class/ScopeOptics.pdf
 * 24) http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-5-12-1951
 * 25) http://spie.org/x15889.xml?highlight=x2422&ArticleID=x15889
 * 26) http://www.stecf.org/~rfosbury/home/natural_colour/biochromes/UV_flowers/Forum.pdf
 * 27) http://www.w1ghz.org/antbook/chap4.pdf
 * 28) http://ads.ahds.ac.uk/catalogue/adsdata/cbaresrep/pdf/012/01202001.pdf
 * 29) http://www.bristolcameras.co.uk/images/nikon%20200mm%20vr.pdf
 * 30) http://www.ciao.co.uk/Sigma_50_150_2_8_EX_DC_HSM_APO_Lens__Review_5759101
 * 31) http://www.photoanswers.co.uk/Community-Landing/Forum-Landing/Forum-Categories/Topic/?&topic-id=141177
 * 32) http://www.steveszone.co.uk/storysofar.shtml
 * 33) http://www.kameraklub.co.za/flash.htm
 * 1) http://www.bristolcameras.co.uk/images/nikon%20200mm%20vr.pdf
 * 2) http://www.ciao.co.uk/Sigma_50_150_2_8_EX_DC_HSM_APO_Lens__Review_5759101
 * 3) http://www.photoanswers.co.uk/Community-Landing/Forum-Landing/Forum-Categories/Topic/?&topic-id=141177
 * 4) http://www.steveszone.co.uk/storysofar.shtml
 * 5) http://www.kameraklub.co.za/flash.htm

Results that do not use ƒ for f-number or f-stop
These pages incidentally appear in Google results for 'ƒ aperture', but do not include a use of ƒ for f-number or f-stop, or in the f/ notation:


 * 1) http://69.37.153.114/Sika/Application%20Guides/7.4%20Special%20Applications%20(Fire%20Proofing%20of%20Cable%20Ducts).pdf
 * 2) http://publik.tuwien.ac.at/files/pub-et_10433.pdf
 * 3) http://www.univie.ac.at/nuhag-php/janssen/data/p135.pdf
 * 4) http://www.atnf.csiro.au/projects/askap/newdocs/eigenbeams.pdf
 * 5) *http://www.forums.meteobelgium.be/index.php?autocom=gallery&req=si&img=2896
 * 6) *http://americanroadmagazine.com/forum/index.php?autocom=gallery&req=si&img=369
 * 7) *http://americanroadmagazine.com/forum/index.php?autocom=gallery&req=si&img=381
 * 8) *http://www.andrianasantiago.com/forums/index.php?autocom=gallery&req=si&img=165
 * 9) *http://forum.australia4wd.com/index.php?autocom=gallery&req=si&img=9831
 * 10) *http://brainden.com/forum/index.php?autocom=gallery&req=si&img=29
 * 11) *http://www.darkmark.com/forum/index.php?autocom=gallery&req=si&img=4944
 * 12) *http://www.emo-corner.com/forums/index.php?autocom=gallery&req=si&img=19280
 * 13) *http://www.escalemodels.com/forums/index.php?autocom=gallery&req=si&img=2650 — error (permission denied), but Google cache shows it to be one of these
 * 14) *http://forum.famouswhy.com/index.php?autocom=gallery&req=si&img=750
 * 15) *http://www.ia-community.com/forums/index.php?autocom=gallery&req=si&img=2005
 * 16) *http://forum.ink-trails.com/gallery-image1867.html
 * 17) *http://forums.ksiglobal.com/index.php?autocom=gallery&req=si&img=5699 — error (permission denied), but Google cache shows it to be one of these
 * 18) *http://hurricane.lakecharlesforum.com/index.php?autocom=gallery&req=si&img=63
 * 19) *http://www.nopistons.com/forums/side-foldedJPG-image5698.html — error (permission denied), but Google cache shows it to be one of these
 * 20) *http://quantumquests.com/forums/index.php?autocom=gallery&req=si&img=1
 * 21) *http://www.shadowedrealm.com/forum/index.php?autocom=gallery&req=si&img=192
 * 22) *http://www.soundsolutionsaudio.com/forum/index.php?autocom=gallery&req=si&img=2754 — error (permission denied), but Google cache shows it to be one of these
 * 23) *http://www.skylinesaustralia.com/forums/PA300201JPG-image70469.html
 * 24) *http://forums.thetoyz.com/index.php?automodule=gallery&req=si&img=1235
 * 25) *http://www.vauva.info/foorumi/index.php?autocom=gallery&req=si&img=668
 * 26) *http://www.squidfish.net/forums/index.php?autocom=gallery&req=si&img=255
 * 27) *http://gallery.citg.tudelft.nl/view_photo_properties.php?set_albumName=CiTGNieuws58&index=3&gallery_popup=true — similar
 * 28) *http://www.chautari.org/forums/index.php?autocom=gallery&req=si&img=770
 * 29) *https://www.ltschools.org/gallery/view_photo_properties.php?set_albumName=student_art&index=2&gallery_popup=true — similar
 * 30) *http://www.sleddersvision.org/forum/index.php?autocom=gallery&req=si&img=207 — error (permission denied), but Google cache shows it to be one of these
 * 31) *http://www.sheffieldhistory.co.uk/forums/index.php?autocom=gallery&req=si&img=228
 * 32) http://www.album.bg/boobs/exif/10176738
 * 33) http://ex.lightsource.ca/hse/presentations/pdf/s4/KTakahashi.pdf
 * 34) http://trshare.triumf.ca/~kaltchev/dk/pub/THA3.pdf
 * 35) http://ocho.uwaterloo.ca/~pfieguth/Research/Samples/unwrap.pdf
 * 36) *http://cdsweb.cern.ch/record/491812/files/open-2001-022.ps.gz
 * 37) *http://accelconf.web.cern.ch/AccelConf/e00/PAPERS/TUP1A15.pdf
 * 38) *http://care-hhh.web.cern.ch/CARE-HHH/CrystalCollimation/papers/Fermilab-Conf-99-072.pdf
 * 39) *http://lhc-div-mms.web.cern.ch/lhc-div-mms/tests/Energy_Deposition/Publications/projectnote%20beta%20beam%20dipole.pdf
 * 40) *http://lhcp.web.cern.ch/lhcp/LCC/LCC_2002-08c.pdf
 * 41) *http://slap.web.cern.ch/slap/NuFact/NuFact/nf58.pdf
 * 42) http://epsppd.epfl.ch/London/pdf/P1_194.pdf
 * 43) *http://www.mercur.ch/bilder/2006,%201%20Quartal/2006-03-18%20Aikontreffen%205,%20Fildern,%20Stuttgart/Edgar%20Rolli,%20MacBit/Fotos_aikon-Treff_2006%20ƒ/slides/PICT0007.htm
 * 44) *http://www.brodmann.name/Bilder/2006,%201%20Quartal/2006-03-18%20Aikontreffen%205,%20Fildern,%20Stuttgart/Edgar%20Rolli,%20MacBit/Fotos_aikon-Treff_2006%20ƒ/slides/PICT0022%5B1%5D.htm
 * 45) *http://www.brodmann.name/Bilder/2006,%201%20Quartal/2006-03-18%20Aikontreffen%205,%20Fildern,%20Stuttgart/Edgar%20Rolli,%20MacBit/Fotos_aikon-Treff_2006%20ƒ/slides/PICT0022%5B2%5D.htm
 * 46) http://slsbd.psi.ch/pub/slsnotes/tmeta9912.pdf
 * 47) http://www.leadertech.com.cn/product/pdf/PXI-4071.pdf
 * 48) *http://www.mid-river.com.cn/support/libs/dalsa/6M3.pdf
 * 49) *http://www.alacron.com/CAMERA/machine-vision-cameras/Dalsa/00068-04_03_70%201M30%20datasheet.pdf
 * 50) *http://www.high-techdigital.com/pdf/Dalsa/00106-03_03_70_Piranha2_P2-4x.pdf
 * 51) *http://www.imagelabs.com/pdf/dalsa_2M30sa.pdf
 * 52) *http://www.ctc-g.co.jp/~hts/dalsa/pdf/2M30-table.pdf
 * 53) *http://www.0-360.com/guides/0-360guide_S5000.pdf
 * 54) *http://www.0-360.com/guides/0-360guide_S9000.pdf
 * 55) *http://www.bergoz.com/products/LR-BPM/LR-BPM-downloads/files/LR-BPM.11flyer.pdf
 * 56) *http://www.gmw.com/beam_diagnostics/Bergoz/bpm/lr_specs.html
 * 57) *http://www.repic.co.jp/contents/products/bergoz/pdf/lr-bpm.pdf
 * 58) http://www.bhphotovideo.com/c/product/520637-USA/Nikon_2164_AF_S_Zoom_Nikkor_24_70mm.html
 * 59) http://www.bobatkins.com/photography/reviews/fisheye.html
 * 60) http://www.cityastronomy.com/rez-mag-contrast.htm
 * 61) http://www.commsdesign.com/design_corner/showArticle.jhtml?articleID=18201798
 * 62) http://ams.confex.com/ams/pdfpapers/105188.pdf
 * 63) http://pdf.directindustry.com/pdf/cvi-melles-griot/general-purpose-flat-mirrors-12567-66968.html
 * 64) http://www.dpreview.com/news/0809/08092201nikkor_50mm_1_4glens.asp
 * 65) *http://www.dyxum.com/lenses/detail.asp?IDLens=2
 * 66) *http://www.dyxum.com/lenses/detail.asp?IDLens=317
 * 67) http://linkinghub.elsevier.com/retrieve/pii/S0167931703001023 — it's possible there's something in the full text
 * 68) http://www.emeraldinsight.com/Insight/html/Output/Published/EmeraldFullTextArticle/Pdf/1740200220.pdf
 * 69) http://www.fiberfin.com/fiber/more_info/84D01800S.pdf
 * 70) *http://flickr.com/groups/creativeaperture/pool/page4/
 * 71) *http://www.flickr.com/groups/creativeaperture/pool/with/2192678903/
 * 72) *http://www.freepatentsonline.com/5909312.html
 * 73) *http://www.freepatentsonline.com/6937396.html
 * 74) http://books.google.com/books?id=CFcVAAAAYAAJ&pg=PA217&lpg=PA217&dq=ƒ+aperture&source=web&ots=xT2Ffq69Jv&sig=UNhst-hBB46vJNYNhtNHAXOUCYM&hl=en&sa=X&oi=book_result&resnum=3&ct=result
 * 75) http://www.goyooptical.com/products/cctv/GAZ10250.pdf
 * 76) http://www.gvrtrade.com/img/JM2005US.pdf
 * 77) http://www.hongkongphotographic.com/lessons.php
 * 78) http://www.industrial-lasers.com/display_article/221989/39/ARCHI/none/Feat/Galvanometer-scanning-speeds-laser-processing
 * 79) http://pdfserve.informaworld.com/130435_731197584_713849031.pdf
 * 80) http://www.ingentaconnect.com/content/klu/mete/2003/00000046/00000002/00468146?crawler=true
 * 81) http://en.leica-camera.com/photography/m_system/lenses/
 * 82) *http://imaging.nikon.com/products/imaging/lineup/lens/af/zoom/af-s_zoom14-24mmf_28g/index.htm
 * 83) *http://imaging.nikon.com/products/imaging/lineup/lens/af/zoom/af-s_zoom24-70mmf_28g/index.htm
 * 84) http://www.oreillynet.com/cs/user/view/cs_msg/42882
 * 85) http://literature.puertoricosupplier.com/~Pending~/KI14790.pdf
 * 86) *http://www.springerlink.com/content/j422541608222134/
 * 87) *http://www.springerlink.com/content/q7528j8m309888l2/
 * 88) http://www.switchfoot.com/community/index.php?autocom=gallery&req=si&img=85
 * 89) *http://www.suss-microoptics.com/downloads/SMO_TechInfo_Sheet_10.pdf
 * 90) *http://www.suss-microoptics.com/downloads/SMO_TechInfo_Sheet_11.pdf
 * 91) http://www.tamron.com/news/35mm/1750di2_2006.asp
 * 92) *http://technorati.com/tag/Nikon+D90
 * 93) *http://technorati.com/tag/g
 * 94) http://thefragens.com/pub/SaveAttachments2Aperture.scpt
 * 95) http://www.thermo.com/eThermo/CMA/PDFs/Articles/articlesFile_24649.pdf — almost?
 * 96) http://www.thinksrs.com/downloads/PDFs/Catalog/SR540c.pdf
 * 97) http://www.ultrasoundbook.com/Chapt8Ex1.pdf
 * 98) http://www.urlfan.com/site/aperture_org/535934.html
 * 99) http://forum.webdesign-tutoriaux.com/index.php?autocom=gallery&req=si&img=4
 * 100) http://www.worldscinet.com/cgi-bin/details.cgi?id=pii:S0217732308027679&type=html
 * 101) *http://www.mycode.cz/www/files/produkty/1529/miniwoody-woody.pdf
 * 102) *http://www.mycode.cz/www/files/produkty/1568/miniwoody.pdf
 * 103) http://www.amaa.de/previous/amaa_2005/presentations2005/02-01-03_Thiem_public.pdf
 * 104) http://www.hmi.de/bensc/instrumentation/pdf_files/BENSC_E9.pdf
 * 105) http://www.silloptics.de/downloads/s19.pdf
 * 106) http://srv-43-200.bv.tu-berlin.de/publications/pdf/ferro02_sqpol2.pdf
 * 107) http://www.optik.uni-erlangen.de/mpf/php/abteilung1/files/jabe/anrep_99_infop.pdf
 * 108) *http://www-opto.e-technik.uni-ulm.de/forschung/jahresbericht/1995/ar1995_bhw.pdf
 * 109) *http://www-opto.e-technik.uni-ulm.de/forschung/jahresbericht/1996/ar1996_bhw.pdf
 * 110) http://www.voigtlaender.de/cms/voigtlaender/voigtlaender_cms.nsf/id/pa_asan6m4dwf.html
 * 111) http://www.mers.byu.edu/docs/thesis/msthesis_smithr_lib.pdf
 * 112) http://www.colby.edu/psychology/ps272fa08/PS272_1117.ppt
 * 113) http://www.propagation.gatech.edu/ECE6390/homework/solution4.pdf
 * 114) http://classweb.gmu.edu/aloerch/LifeCycle3%202005.pdf
 * 115) http://adsabs.harvard.edu/abs/1981OptCo..39..211L
 * 116) http://fuse.pha.jhu.edu/users/wkshp_feb00/awf_FlatField.pdf
 * 117) http://www.ittc.ku.edu/publications/documents/Stiles2000_IGARSS2000-7.pdf
 * 118) http://ocw.mit.edu/NR/rdonlyres/Materials-Science-and-Engineering/3-080Fall-2005/15EF572E-498C-4F61-978F-348ECEB2C3C9/0/ms_project.pdf
 * 119) http://www.cns.nyu.edu/~alan/publications/conferences/NIPS98/Stocker_Douglas99.pdf
 * 120) http://www.psi.edu/~jpmorgen/pdf/jpmorgen02_hale-boppOI_poster.pdf
 * 121) http://www.physics.purdue.edu/Snowmass2001_E2/slides_0714/Sen_0714.pdf
 * 122) http://www.rpi.edu/~cheney/papers/hrrisar.pdf
 * 123) http://www.slac.stanford.edu/BFROOT/www/Detector/Backgrounds/MDI_PAC05_PAP/TPPP025.pdf
 * 124) http://www.ee.sunysb.edu/~cvl/Publications/JKTyan_SPIE1995.pdf — technical paper about autofocusing cameras, but doesn't seem to use the terms f-number or f-stop or the f/ notation
 * 125) http://www.ipam.ucla.edu/publications/ao2004/ao2004_4636.pdf
 * 126) http://users.umassmed.edu/corinne.groiselle/BOSTON'00.pps
 * 127) http://www.cs.umd.edu/~djacobs/CMSC426/Matching.pdf
 * 128) http://nmcpp.phys.unm.edu/johnm/icrc1999_johnm.pdf
 * 129) https://forja.rediris.es/plugins/scmsvn/viewcvs.php/SubDownloader/mmpython/image/EXIF.pyc?view=markup&root=csl-subdownload&pathrev=1
 * 130) http://www.ucm.es/info/Astrof/fgkmsl/hd219134_ues_hb_2.fit
 * 131) http://www.upv.es/antenas/Documentos_PDF/slides/Antennas_1.PDF
 * 132) http://irfu.cea.fr/Phocea/file.php?class=std&file=Doc/Publications/Archives/stcm-00-23
 * 133) http://www.lesia.obspm.fr/plasma/LOFAR2006/LOFAR_ESFRI_24nov05.pdf
 * 134) http://www.fast.u-psud.fr/~cargese/poster/lange/lange.pdf
 * 135) http://www.agsrhichome.bnl.gov/AP/ap_notes/RHIC_AP_161.pdf
 * 136) http://tdpc02.fnal.gov/glass/vlhc_workshop/papers/SIIa_P9.pdf
 * 137) http://www.staff.u-szeged.hu/~erdelyim/PhD/Annular_illumination.pdf
 * 138) http://www.sjbit.ac.in/qbank/undone/Electronics/6sem/antennas.doc
 * 139) http://gael-varoquaux.info/physics/slides_EGC2005.pdf
 * 140) http://adopt.arcetri.astro.it/html/pubblicazioni/arcetri/html/publications/2001_verinaud_eso_58_153.pdf
 * 141) http://macserver.lns.infn.it/simple/documents/Project_LNS_VUB2.pdf
 * 142) http://www.sesame.org.jo/pdf/M-1.pdf
 * 143) http://joi.jlc.jst.go.jp/JST.JSTAGE/shigentosozai/116.636?from=Google
 * 144) http://jjap.ipap.jp/link?JJAP/46/3433/
 * 145) http://acfahep.kek.jp/subg/ir/nanoBPM/library/honda.report/ipbpm_cav_basic_0.d050914.pdf
 * 146) http://www.astroscu.unam.mx/~irene/spm2007/LeonardoSanchez.pdf
 * 147) http://photo.net/columns/mjohnston/pentax-35mm-lens/optical-discussion/
 * 148) http://home.hetnet.nl/~artm/atm/articles/schief_kit.html
 * 149) http://www.nikhef.nl/~h73/kn1c/praktikum/phywe/LEP/Experim/1_5_01.pdf
 * 150) http://www.science.uva.nl/research/isla/pub/1991.%20The%20one-point%20fluorescence%20response%20in%20confocal%20microscopy.pdf
 * 151) http://www.dnu.no/arkiv1/multek_20030925_DFM.pdf
 * 152) http://www.elec.canterbury.ac.nz/research/acoustics/pubs/papers/2001/Callow_igarss_2001.pdf
 * 153) http://prola.aps.org/abstract/PRA/v35/i4/p1697_1
 * 154) http://arxiv.org/pdf/quant-ph/9607003
 * 155) http://data.astronomycamp.org/2007/AdvancedTeen/12inchCCD/Dark_AO618_-001D2.fit
 * 156) http://www.auger.org/technical_info/pdfs/icrc2005/icrc_2005_122.pdf
 * 157) http://cvitae.org/component/option,com_comprofiler/task,userProfile/user,253/
 * 158) http://www.datasheetcatalog.org/datasheet/fairchild/SPT7721.pdf
 * 159) http://www.egmrs.org/EJS/PDF/vo272/251.pdf
 * 160) *http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=04151913
 * 161) *http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=04234091
 * 162) http://www.imagesensors.org/Past%20Workshops/2001%20Workshop/2001%20Papers/pg%20016%20Inoue.pdf
 * 163) http://www.imom.org/community/index.php?autocom=gallery&req=si&img=25
 * 164) http://www.indianfolklore.org/journals/index.php/tuluva/article/viewFile/333/281
 * 165) http://www.iop.org/EJ/abstract/1063-7818/28/6/A06
 * 166) http://mediastorm.org/blog/
 * 167) http://www.mwcircle.org/res-mwloop-book.htm
 * 168) *http://www.opticsinfobase.org/ao/abstract.cfm?id=16502
 * 169) *http://www.opticsinfobase.org/DirectPDFAccess/E24447A3-BDB9-137E-C402472C7AF9E02A_163227.pdf?da=1&id=163227&seq=0&CFID=24708692&CFTOKEN=48799190
 * 170) http://projecteuclid.org/DPubS?verb=Display&version=1.0&service=UI&handle=euclid.bams/1183532836&page=record
 * 171) http://www.rtdf.org/public/permbarr/minutes/102704/pdf/vance.pdf
 * 172) http://www.sefere.org/public/MIRA_EuroEMC_2008.pdf
 * 173) http://www.silence-ip.org/site/fileadmin/SP_E/Deliverable_ED10_CRF.pdf
 * 174) *http://www.ursi.org/Proceedings/ProcGA02/papers/p1827.pdf
 * 175) *http://www.ursi.org/Proceedings/ProcGA02/papers/p1838.pdf
 * 176) http://fluid.ippt.gov.pl/ictam04/text/sessions/docs/FM22/12731/FM22_12731.pdf
 * 177) http://welcome.isr.ist.utl.pt/img/pdfs/318_C32.pdf
 * 178) http://www.akin.ru/Docs/Rao/Ses10/Di11.PDF
 * 179) http://www.ipme.ru/ipme/labs/cmg/home/2001/PAC01/TPPH065/TPPH065.pdf
 * 180) *http://www1.jinr.ru/Pepan_letters/panl_6_2006/05_avr.pdf
 * 181) *http://www1.jinr.ru/Preprints/2005/221(P9-2005-221).pdf
 * 182) http://www.p-ng.si/public/pao/bibl/icrc_2005_eparizot.pdf
 * 183) http://www.stkc.go.th/stportalDocument/stportal_1118027622.pdf
 * 184) http://www.astro.ncu.edu.tw/~astcamp/handout/book/NCT_Chang.pdf
 * 185) http://www.cockcroft.ac.uk/papers/Cockcroft-05-01.pdf
 * 186) https://www.conform.ac.uk/documents/emma/ec%20-%20emma%20collaboration%20meetings/Mtg21-2008-aug12/Painting-%20Stephan%20Tzenov.pdf
 * 187) http://www.cranfield.ac.uk/soe/postgraduatestudy/astronautics/astronautics%20msc%20brochure.pdf
 * 188) http://www.clf.rl.ac.uk/Reports/1998-1999/pdf/20.pdf
 * 189) http://www.thesafeshop.co.uk/downloads/redl2-1901-electronic-lock-manual.pdf
 * 190) http://www.ee2.org.uk/PDF/NV16_SoundAdvice.pdf
 * 191) http://www.patentstorm.us/patents/7173562.html
 * 1) *http://www.ursi.org/Proceedings/ProcGA02/papers/p1827.pdf
 * 2) *http://www.ursi.org/Proceedings/ProcGA02/papers/p1838.pdf
 * 3) http://fluid.ippt.gov.pl/ictam04/text/sessions/docs/FM22/12731/FM22_12731.pdf
 * 4) http://welcome.isr.ist.utl.pt/img/pdfs/318_C32.pdf
 * 5) http://www.akin.ru/Docs/Rao/Ses10/Di11.PDF
 * 6) http://www.ipme.ru/ipme/labs/cmg/home/2001/PAC01/TPPH065/TPPH065.pdf
 * 7) *http://www1.jinr.ru/Pepan_letters/panl_6_2006/05_avr.pdf
 * 8) *http://www1.jinr.ru/Preprints/2005/221(P9-2005-221).pdf
 * 9) http://www.p-ng.si/public/pao/bibl/icrc_2005_eparizot.pdf
 * 10) http://www.stkc.go.th/stportalDocument/stportal_1118027622.pdf
 * 11) http://www.astro.ncu.edu.tw/~astcamp/handout/book/NCT_Chang.pdf
 * 12) http://www.cockcroft.ac.uk/papers/Cockcroft-05-01.pdf
 * 13) https://www.conform.ac.uk/documents/emma/ec%20-%20emma%20collaboration%20meetings/Mtg21-2008-aug12/Painting-%20Stephan%20Tzenov.pdf
 * 14) http://www.cranfield.ac.uk/soe/postgraduatestudy/astronautics/astronautics%20msc%20brochure.pdf
 * 15) http://www.clf.rl.ac.uk/Reports/1998-1999/pdf/20.pdf
 * 16) http://www.thesafeshop.co.uk/downloads/redl2-1901-electronic-lock-manual.pdf
 * 17) http://www.ee2.org.uk/PDF/NV16_SoundAdvice.pdf
 * 18) http://www.patentstorm.us/patents/7173562.html
 * 1) http://www.patentstorm.us/patents/7173562.html

Other pages
Wikipedia pages:


 * 1) http://en.wikipedia.org/wiki/Canon_EF_50mm_lens
 * 2) *http://en.wikipedia.org/wiki/Ƒ
 * 3) *http://wiki.verkata.com/en/wiki/Ƒ
 * 4) http://encyclopedia2.thefreedictionary.com/Numerical+approximation
 * 1) http://encyclopedia2.thefreedictionary.com/Numerical+approximation

Unavailable:


 * 1) http://ftp.datx.com/Public/CameraConfigurationFiles/Camera_Data_Sheets/Dalsa_Cameras/P2_2x_Datasheet.pdf — can't find server
 * 2) http://www.photon-inc.com/PDF/Measure_Divergence.PDF — file not found
 * 3) *http://es.youtube.com/flag_user?username=Lilkiwiguy87&action=report_background — invalid request
 * 4) *http://br.youtube.com/flag_user?username=Muskieman911&action=report_background — invalid request
 * 5) http://facilities.mrl.uiuc.edu/laserlab/manuals/SR540m.pdf — server not responding
 * 6) http://norsig.no/norsig2002/Proceedings/papers/cr1120.pdf — can't find server
 * 7) http://www.astm.org/JOURNALS/FORENSIC/PAGES/JFSCH5275X2.htm — file not found
 * 8) http://doi.ieeecs.org/10.1109/ICPR.2002.1048369 — no data
 * 9) *http://it.iucr.org/Cb/ch2o3v0001/fig2o3o1o4.pdf — password-protected
 * 10) *http://it.iucr.org/Cb/ch2o3v0001/sec2o3o1o5.pdf — password-protected
 * 1) *http://it.iucr.org/Cb/ch2o3v0001/fig2o3o1o4.pdf — password-protected
 * 2) *http://it.iucr.org/Cb/ch2o3v0001/sec2o3o1o5.pdf — password-protected