Technical Questions on Photography and Optics

Subject	Started by	Replies	Views	Last post
Tamron, Sigma Lens	Beachduffer	1	2153	January 18, 2010, 04:07:08 PM by Bob Atkins
Sigma VS Canon Telephot Comparison Question	Tallyther	1	1701	January 10, 2010, 10:19:43 PM by Bob Atkins
I accidentally forcefully over-turned the lens barrel (rotating)	ashy	1	3516	August 11, 2009, 02:54:06 PM by Bob Atkins
Millennium UV Filters	dppollet	1	3907	January 20, 2009, 04:49:43 PM by Bob Atkins
flashing lights when viewing my pics on my canon 40d	gap5758	1	2182	September 12, 2010, 05:48:08 PM by KeithB
Exposure Time Limitations on a Canon 40D	Tallyther	1	1090	March 26, 2012, 09:59:31 PM by Bob Atkins
How does microfocus adjustment work?	Frank Kolwicz	1	1195	August 08, 2012, 02:36:36 PM by KeithB
A Prime to Better the Kit Lens ?	Flash	1	891	October 24, 2011, 05:05:23 PM by Bob Atkins
test chart; inches or centimetres?	jpmfc46	1	4674	August 26, 2008, 11:19:32 AM by Bob Atkins
canon 24mm f2.8	streetshooter	1	5105	September 04, 2008, 11:26:29 AM by Bob Atkins
Digital Dark Room skill	DNA	1	4378	June 26, 2008, 04:53:33 PM by KeithB
Image Resolution enhancement	KeithB	1	1171	February 01, 2011, 08:17:23 AM by emanresu
Remembering Velvia color	DNA	1	4775	June 22, 2008, 07:06:41 PM by Bob Atkins
Mining T-Stop Data from DxO	KeithB	1	1200	October 27, 2010, 10:45:17 AM by Bob Atkins
Lines per mm. in relation to magnification factors.	alanscape	1	3933	January 04, 2009, 10:48:20 AM by Bob Atkins
Adapting Jupiter - 9 85mm/T2 for Canon 7D EF body	henry temp	1	2550	December 10, 2010, 11:23:53 AM by Bob Atkins
photoshop elements 6	conbu19	1	5206	May 29, 2008, 11:44:19 AM by Bob Atkins
Canon 25mm Extension Tube.	Leong	1	5868	August 21, 2008, 11:36:30 AM by Bob Atkins
Checking out a new camera	duranash	1	3858	December 05, 2008, 05:13:15 PM by Bob Atkins
Telescope Mounts for Cameras	klindup	1	60	June 13, 2013, 01:39:39 PM by Bob Atkins