Technical Questions on Photography and Optics

Subject	Started by	Replies	Views	Last post
pinhole camera	KeithB	3	7738	October 15, 2009, 01:27:29 PM by KeithB
Raw files and ISO THE QUESTION NO ONE SEEMS TO BE ABLE TO ANSWER	REGGIE	2	6875	October 06, 2009, 07:56:02 PM by REGGIE
Tamron 18-250, not really 250. Really not 250.	winniv	2	7683	September 16, 2009, 10:50:27 PM by winniv
I accidentally forcefully over-turned the lens barrel (rotating)	ashy	1	6962	August 11, 2009, 02:54:06 PM by Bob Atkins
!.4X Extender recommendations: Canon or Kenko or Sigma ?	nycandre	5	12446	August 11, 2009, 06:33:53 AM by SidSP
FF vs APS ( 5D vs 20D sensor) article	nycandre	2	6669	August 01, 2009, 01:54:45 PM by nycandre
Testing Old FD Lenses	SidSP	2	7096	July 28, 2009, 03:12:39 PM by SidSP
Resolution and High ISO use.	whizkid	7	11120	July 17, 2009, 08:50:22 AM by Bob Atkins
18-55 for macro use but what's a better choice?	EssEll	1	6605	July 08, 2009, 08:01:34 PM by Bob Atkins
Prime v Zoom	Mickw	3	7826	July 08, 2009, 07:06:05 PM by Bob Atkins
MOVED: banquet photos	Bob Atkins	0	6526	June 29, 2009, 12:43:35 PM by Bob Atkins
100% Crop	bmpress	4	9181	June 29, 2009, 09:30:52 AM by KeithB
Canon XTi flash	bgclight	5	10457	June 24, 2009, 08:34:49 AM by bgclight
Canon Macro Lens	Beachduffer	4	8364	June 20, 2009, 08:12:22 AM by Beachduffer
Canon 40D AF Issues - What are my options?	gkmusser	3	11871	June 17, 2009, 04:59:43 PM by Bob Atkins
Canon EF 100mm f2.8 marco usm VS Sigma 105mm f2.8 macro	Beachduffer	3	10657	June 17, 2009, 10:15:20 AM by Bob Atkins
Whisch lens to choose?	Mickw	2	7452	June 07, 2009, 10:50:58 PM by Bob Atkins
Position of the focal plane of a camera on a photo taken with it	Wimpels	5	9969	June 03, 2009, 11:11:16 AM by KeithB
My not-sharp 28-135 IS	mlmoody	2	7386	June 03, 2009, 10:53:48 AM by KeithB
Full frame lens use with DX sensor (Nikon)	johnhartman	2	7108	May 22, 2009, 09:15:16 AM by johnhartman