User talk:IM3847

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Join the Months of African Cinema Global Contest!
Ýou can opt-out of this annual reminder from The Afrocine Project by removing your username from this list

Welcome to the Months of African Cinema Global Contest!
Ýou can opt-out of this annual reminder from The Afrocine Project by removing your username from this list

A2K Monthly Report for May 2024
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Regards MediaWiki message delivery (talk) 12:38, 27 June 2024 (UTC)

Spherical aberration



 * @Toddy1 Thanks for the info, this was captured using EF-S10-18mm f/4.5-5.6 IS STM at 10mm. May be that resulted in too much aberration. Will definitely keep that in mind and will get a good image of Hyderabad skyline, very next time I visit it. Thanks for the inputs. --iMahesh ( talk ) 10:25, 20 July 2024 (UTC)
 * You used Adobe Photoshop CC 2019 (Windows) to edit the photograph. Does that software have filters for correct camera distortion?


 * I did a quick experiment with Photoshop Elements (in "Expert Mode"):
 * There is a "Remove Distortion" slider bar. I found that by moving that to the left, it reduced the curvature of the corner of the tall building.  (i.e. I was compensating for "pincushion distortion" with "barrel distortion".  (These terms are used in Distortion (optics).  In Elements, a setting of -9.0 was an improvement.
 * There is a "Vertical Perspective" slider in the "Perspective Control" area. I found that moving that to the right reduced the splaying out of the buildings.  In Elements, a setting of +9 was an improvement.
 * The corrected picture still shows some aberration, but it is better. I would imagine that if you experimented with different values of the different you could get it better that I did in my quick experiment.


 * I still recommend using better lens and taking the picture at a greater distance. But you could improve your photograph a lot by reducing the aberration if your version of Photoshop has those facilities. -- Toddy1 (talk) 15:37, 20 July 2024 (UTC)


 * If you do try such software, try using the slider to get to roughly the correction you want, and then changing the number in the white box by typing a different number - I found that an easier way of exactly controlling the response than moving the slider. -- Toddy1 (talk) 15:40, 20 July 2024 (UTC)
 * Yes, I have gone through them. I recently started processing files after converting RAW to JPEG as soon as feasible because I travel a lot. As a result, data was lost. I'll look for the RAW file and attempt these settings. Thanks for your inputs. iMahesh ( talk ) 05:14, 21 July 2024 (UTC)