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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
Canon 25mm Extension Tube. Leong 1 7034 Last post August 21, 2008, 11:36:30 AM
by Bob Atkins
Canon 40D AF Issues - What are my options? gkmusser 3 7093 Last post June 17, 2009, 04:59:43 PM
by Bob Atkins
Rechipping a Sigma 400 5.6 APO TeleMacro for Canon wilfredmike 4 7096 Last post October 16, 2009, 07:52:53 AM
by wilfredmike
Your "Black Dots" article - question duranash 8 7377 Last post January 09, 2009, 02:23:22 PM
by Bob Atkins
Auto Focus Technology for Low Light Moving Subject Shooting 427l 3 7476 Last post February 23, 2009, 10:15:00 AM
by Bob Atkins
EXIF Hyperfocal Distance etc. diplonics 3 7553 Last post July 14, 2008, 09:32:21 AM
by KeithB
Lens camouflage? « 1 2 » Frank Kolwicz 20 7576 Last post September 18, 2013, 12:03:09 PM
by Frank Kolwicz
Manual focus lenses yayas 6 7722 Last post April 26, 2009, 08:38:31 PM
by Bob Atkins
Help with a "walk-around ... DP 10 7904 Last post May 04, 2009, 09:32:58 AM
by KeithB
Modifying the Canon EF-S 18-55 *IS* lens for use on Canon 10D? E7RNN 5 8037 Last post February 06, 2011, 02:13:58 PM
by poppy79424
!.4X Extender recommendations: Canon or Kenko or Sigma ? nycandre 5 8386 Last post August 11, 2009, 06:33:53 AM
by SidSP
What physical/optical attributes determine the max aperture of a lens? emanresu 10 8430 Last post November 04, 2009, 08:54:38 PM
by emanresu
1.6X crop versus full frame sensor diffraction limits with small apertures John Hanlon 2 8589 Last post July 01, 2008, 10:08:11 AM
by John Hanlon
Processing digital infrared photos jamisan 7 8887 Last post February 23, 2009, 07:24:59 PM
by jamisan
sRAW and how it is implemented? 509 2 8905 Last post August 28, 2008, 10:07:33 AM
by 509
Green Goblin effect Barrierislandgirl 9 9080 Last post February 09, 2009, 09:19:08 AM
by Barrierislandgirl
Testing an old flash for voltage KeithB 9 9122 Last post December 02, 2009, 01:27:22 AM
by nikonian
any recommendations on good GND filters? « 1 2 » emanresu 20 9239 Last post March 11, 2011, 04:04:03 PM
by Bob Atkins
The Cost vs. Performance Dilemma of Choosing a Circular Polarizing Filter dppollet 3 10639 Last post May 12, 2009, 12:38:44 PM
by KeithB
does crop factor affect the actual f-stop? emanresu 8 10869 Last post April 07, 2010, 09:32:50 AM
by KeithB
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