Technical Questions on Photography and Optics

Subject	Started by	Replies	Views	Last post
Lens testing	KeithB	2	1357	June 16, 2010, 11:54:12 AM by Bob Atkins
Focusing long lens camera	beardown911	3	1505	June 11, 2010, 12:02:07 PM by beardown911
Canon PowerShot A720 IS	j cowan	1	1708	May 16, 2010, 11:11:01 AM by Bob Atkins
White Balance Menu Settings	bmpress	3	1547	May 12, 2010, 10:35:41 AM by bmpress
EF-S 17-85mm IS USM and the Err99 of Doom	ESP2008	6	1982	April 14, 2010, 11:32:33 PM by ESP2008
reflective cameras?	emanresu	4	1562	April 07, 2010, 10:17:13 AM by klindup
does crop factor affect the actual f-stop?	emanresu	8	3519	April 07, 2010, 09:32:50 AM by KeithB
question on IS motor	emanresu	4	1759	April 06, 2010, 01:03:28 PM by emanresu
checkerboard chart	avi	2	2160	March 15, 2010, 11:41:13 AM by avi
Las Vegas Nights and Grand Canyon - Best Lens under $400 for site	blazer	3	4321	March 08, 2010, 07:36:50 AM by ClaireJeffries
Canon 40D picture quality issue!	Tallyther	1	1614	March 07, 2010, 07:21:51 PM by Bob Atkins
newbie lens question	126andy	2	1288	March 07, 2010, 02:08:51 PM by 126andy
DOF optimization	pesa	10	2613	February 20, 2010, 02:39:40 PM by Bob Atkins
Will changing lens focal length by TC corrupt image stabilizer?	dentheman	4	1585	February 12, 2010, 02:22:58 PM by dentheman
The Age Old Question - Lenses	Rikster71	14	3605	February 11, 2010, 10:30:55 AM by Bob Atkins
EF kit lense Auto Focus	stixstudios	4	1798	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	3035	January 29, 2010, 08:08:22 PM by emanresu
"L" Lens Mount Issue	Tallyther	2	1603	January 23, 2010, 12:41:14 PM by Tallyther
Questionable Damage Effects Due to Dented End of Lens	Tallyther	2	1408	January 23, 2010, 12:40:15 PM by Tallyther
The old 20D	Paula	1	1194	January 22, 2010, 10:52:04 AM by Bob Atkins