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Author Topic: What Lens?  (Read 3678 times)
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« 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?


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

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.

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