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+  The Canon EOS and Photography Forums
|-+  Photography Forums
| |-+  Technical Questions on Photography and Optics
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Subject Started by Replies Views Last post
Constant Aperture Zooms KeithB 3 2598 Last post June 24, 2010, 11:47:28 AM
by Bob Atkins
Lens testing KeithB 2 2444 Last post June 16, 2010, 11:54:12 AM
by Bob Atkins
Focusing long lens camera beardown911 3 2764 Last post June 11, 2010, 12:02:07 PM
by beardown911
Canon PowerShot A720 IS j cowan 1 3396 Last post May 16, 2010, 11:11:01 AM
by Bob Atkins
White Balance Menu Settings bmpress 3 2824 Last post May 12, 2010, 10:35:41 AM
by bmpress
EF-S 17-85mm IS USM and the Err99 of Doom ESP2008 6 3682 Last post April 14, 2010, 11:32:33 PM
by ESP2008
reflective cameras? emanresu 4 2800 Last post April 07, 2010, 10:17:13 AM
by klindup
does crop factor affect the actual f-stop? emanresu 8 9788 Last post April 07, 2010, 09:32:50 AM
by KeithB
question on IS motor emanresu 4 3039 Last post April 06, 2010, 01:03:28 PM
by emanresu
checkerboard chart avi 2 3757 Last post March 15, 2010, 11:41:13 AM
by avi
Las Vegas Nights and Grand Canyon - Best Lens under $400 for site blazer 3 6219 Last post March 08, 2010, 07:36:50 AM
by ClaireJeffries
Canon 40D picture quality issue! Tallyther 1 2687 Last post March 07, 2010, 07:21:51 PM
by Bob Atkins
newbie lens question 126andy 2 2281 Last post March 07, 2010, 02:08:51 PM
by 126andy
DOF optimization pesa 10 4222 Last post February 20, 2010, 02:39:40 PM
by Bob Atkins
Will changing lens focal length by TC corrupt image stabilizer? dentheman 4 2849 Last post February 12, 2010, 02:22:58 PM
by dentheman
The Age Old Question - Lenses Rikster71 14 5402 Last post February 11, 2010, 10:30:55 AM
by Bob Atkins
EF kit lense Auto Focus stixstudios 4 2870 Last post January 30, 2010, 07:59:55 PM
by emanresu
I want an eye popping sharp lens compared to what I have. So which is least $? Tallyther 10 4665 Last post January 29, 2010, 08:08:22 PM
by emanresu
"L" Lens Mount Issue Tallyther 2 2625 Last post January 23, 2010, 12:41:14 PM
by Tallyther
Questionable Damage Effects Due to Dented End of Lens Tallyther 2 2491 Last post January 23, 2010, 12:40:15 PM
by Tallyther
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