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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
Sigma VS Canon Telephot Comparison Question Tallyther 1 2369 Last post January 10, 2010, 10:19:43 PM
by Bob Atkins
Solved: all those problems with the 500/4.5 and 5dII Frank Kolwicz 0 1598 Last post August 10, 2012, 06:24:30 PM
by Frank Kolwicz
Spherical aberration and focusing mike_tee_vee 2 5839 Last post February 27, 2009, 12:47:58 PM
by klindup
sRAW and how it is implemented? 509 2 9249 Last post August 28, 2008, 10:07:33 AM
by 509
Statement in Luminous Landscape KeithB 1 1670 Last post August 09, 2013, 04:16:09 PM
by Bob Atkins
Tamron 18-250, not really 250. Really not 250. winniv 2 4573 Last post September 16, 2009, 10:50:27 PM
by winniv
Tamron, Sigma Lens Beachduffer 1 2898 Last post January 18, 2010, 04:07:08 PM
by Bob Atkins
Telescope Mounts for Cameras klindup 1 1476 Last post June 13, 2013, 01:39:39 PM
by Bob Atkins
Telextenders versus cropping and quality Frank Kolwicz 3 3054 Last post June 28, 2011, 10:38:42 AM
by KeithB
test chart; inches or centimetres? jpmfc46 1 5661 Last post August 26, 2008, 11:19:32 AM
by Bob Atkins
Testing an old flash for voltage KeithB 9 9429 Last post December 02, 2009, 01:27:22 AM
by nikonian
Testing Old FD Lenses SidSP 2 4586 Last post July 28, 2009, 03:12:39 PM
by SidSP
The Age Old Question - Lenses Rikster71 14 6331 Last post February 11, 2010, 10:30:55 AM
by Bob Atkins
The Cost vs. Performance Dilemma of Choosing a Circular Polarizing Filter dppollet 3 11009 Last post May 12, 2009, 12:38:44 PM
by KeithB
The old 20D Paula 1 2387 Last post January 22, 2010, 10:52:04 AM
by Bob Atkins
Too much fill flash olyduck 1 5133 Last post May 02, 2009, 05:21:13 PM
by Bob Atkins
Viewfinder brightness limit KeithB 3 3133 Last post April 21, 2011, 07:37:21 AM
by KeithB
What physical/optical attributes determine the max aperture of a lens? emanresu 10 8672 Last post November 04, 2009, 08:54:38 PM
by emanresu
Whisch lens to choose? Mickw 2 4894 Last post June 07, 2009, 10:50:58 PM
by Bob Atkins
White Balance Menu Settings bmpress 3 3169 Last post May 12, 2010, 10:35:41 AM
by bmpress
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