The DAM Forum
Welcome, Guest. Please login or register.
April 19, 2014, 11:10:54 PM

Login with username, password and session length
Search:     Advanced search
28003 Posts in 5130 Topics by 2912 Members
Latest Member: kbroch
* Home Help Search Login Register
+  The DAM Forum
|-+  DAM Stuff
| |-+  Scans and Camera Scans
| | |-+  What Lens?
« previous next »
Pages: [1] Print
Author Topic: What Lens?  (Read 1784 times)
jcbenner
Newbie
*
Posts: 12


View Profile
« on: December 08, 2009, 07:42:38 AM »

What are the relative merits of using a 50mm focal length vs. a 100mm focal length for the purposes of camera scans? The set-up length will be shorter and more convenient with the 50mm, but what about the image quality?  Any differences?

Thanks,

John
Logged
peterkrogh
Administrator
Hero Member
*****
Posts: 5682


View Profile Email
« Reply #1 on: December 13, 2009, 09:41:02 AM »

John,
Several good reasons to use shorter lenses:

1. Better ergonomics - shorter distance from camera to film stage
2. More depth of field at same aperture - should help with edge-to-edge focus
3. Easier to shade the lens - whatever is backlighting the film needs to be protected from hitting the lens elements directly.

Peter
Logged
Pages: [1] Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!