Technical Questions on Photography and Optics

Subject	Started by	Replies	Views	Last post
Constant Aperture Zooms	KeithB	3	2097	June 24, 2010, 11:47:28 AM by Bob Atkins
Tamron, Sigma Lens	Beachduffer	1	2139	January 18, 2010, 04:07:08 PM by Bob Atkins
DOF: comparing TS-E lenses for Product Photography (1" - 10" sized jewelry)	mr.peacock	2	2151	July 13, 2010, 09:22:07 AM by mr.peacock
flashing lights when viewing my pics on my canon 40d	gap5758	1	2162	September 12, 2010, 05:48:08 PM by KeithB
Focusing long lens camera	beardown911	3	2187	June 11, 2010, 12:02:07 PM by beardown911
"L" Lens Mount Issue	Tallyther	2	2236	January 23, 2010, 12:41:14 PM by Tallyther
Will changing lens focal length by TC corrupt image stabilizer?	dentheman	4	2262	February 12, 2010, 02:22:58 PM by dentheman
reflective cameras?	emanresu	4	2277	April 07, 2010, 10:17:13 AM by klindup
Canon 40D picture quality issue!	Tallyther	1	2350	March 07, 2010, 07:21:51 PM by Bob Atkins
White Balance Menu Settings	bmpress	3	2385	May 12, 2010, 10:35:41 AM by bmpress
1600mm lens for less than $180??	emanresu	0	2467	December 07, 2009, 09:55:02 PM by emanresu
question on IS motor	emanresu	4	2496	April 06, 2010, 01:03:28 PM by emanresu
Limitations on editing scanned slides	bmpress	2	2511	December 12, 2009, 05:36:15 PM by bmpress
EF kit lense Auto Focus	stixstudios	4	2514	January 30, 2010, 07:59:55 PM by emanresu
Adapting Jupiter - 9 85mm/T2 for Canon 7D EF body	henry temp	1	2519	December 10, 2010, 11:23:53 AM by Bob Atkins
I'm looking at buying a refurbished Canon EF 300mm f/2.8L IS USM. Please advise	Tallyther	2	2610	January 13, 2010, 07:48:12 PM by Tallyther
Canon PowerShot A720 IS	j cowan	1	2705	May 16, 2010, 11:11:01 AM by Bob Atkins
Canon 5DII and 500L/4.5 still has focus problem « 1 2 »	Frank Kolwicz	19	2810	August 10, 2012, 06:14:55 PM by Frank Kolwicz
EF-S 17-85mm IS USM and the Err99 of Doom	ESP2008	6	2813	April 14, 2010, 11:32:33 PM by ESP2008
Lens camouflage?	Frank Kolwicz	14	2817	March 21, 2012, 02:45:59 AM by klindup