Talk:Fixed-focus lens

Deletion.
I'm not sure why deletion of this article has been proposed. Perhaps a rewrite or reversion would be preferable. Fixed-focus cameras are pretty common. Surely an article discussing the characteristics of fixed focus imaging systems is appropriate?--Srleffler 04:13, 24 September 2007 (UTC)


 * Several things. First, it's a small topic that should be covered elsewhere.  Second, if we do cover it in its own article, do we want it to be named by a term that can't be defined as a noun?  Certainly we don't want a confusion between focus and focal length to be prominently displayed in the lead.  I just thought it would be better to get rid of it than to try to turn it into something useful.  Same with guess focusing.  Both are copied from another wiki, and have no reliable sources or evidence of notability as topics. Dicklyon 04:21, 24 September 2007 (UTC)

NONSENSE COMPARISONS!
I will never see this extremely dumb comparisons between fix-focus and autofocus again!!! The fix-focus lens is just out of focus-range, the not compared mobile-phones with similar very small, low-resolution sensors and bad autofocus-systems will in practice often gain quality from a fixfocus. Period. Tagremover (talk) 13:46, 1 March 2012 (UTC)

Hubble image
The addition of the HST image and text to illustrate this point are un-referenced. I also don't see anything to support it re: the HST is not "fixed focus", error was spherical aberration, not focus. Fountains of Bryn Mawr (talk) 18:44, 4 March 2012 (UTC)


 * Can´t see any focusing elements in the construction, only very small trim actuators. The error was IMHO partly focus and not only spherical aberration, also i can´t find the source any more. Tagremover (talk) 21:51, 5 March 2012 (UTC)

I too don't remember where I was reading in the astronomical magazines of the time, but like other large telescopes the HST has mechanisms to adjust the position of the sensors for focus, and like others there isn't much need to adjust again after the first few weeks because the objects are all at infinity. So, most of its life, any astrograph is operated as fixed focus even though it has a focusing mechanism. Problem with HST once it got on orbit was, no matter how they adjusted the sensor position, it wouldn't come into focus. That was because of spherical abberation. In any case HST is unhelpful for readers who are using the present article to understand the general theory and use of fixed focus operation. What would be helpful would be a Lubitel or disposable camera or other box camera. Jim.henderson (talk) 13:09, 6 March 2012 (UTC)
 * OK, forget Hubble. Mainly started editing because i noticed its a poor article, and additionally need: 1-group lens, unit focusing lens, and aperture-less lens to cover new developments in the Nokia 808. Tagremover (talk) 03:02, 7 March 2012 (UTC)