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08-11-2007, 02:01 AM   #1
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Is it 50mm or 75mm on digital?

Hi there.

I have a problem.
For some it may sound silly but I just don't know what to do.

While using my old lens (SMC Pentax-A 50mm 1:1.7) on K10D camera is asking me to set focal lenght of the lens.
Should I set it on 50mm as it is, or 75mm which is equivalent of it on digital?

Looking forward to any help.
Thanks a lot.

Flickr: Photos from jpmb76
Flickr: Just PENTAX!

Last edited by jambowl; 08-15-2007 at 01:36 PM.
08-11-2007, 02:12 AM   #2
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You should enter 50mm
08-11-2007, 10:12 AM   #3
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Thommo is correct. Enter ANY lens (old/new inbetween) as what it is, not it's FOV with the 1.5 crop. The SR works directly on the real distance, not on the perceived crop distance.

NaCl(and it's not a silly question)H2O
08-12-2007, 02:50 AM   #4
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Original Poster

Thank you guys.

Thommo I have looked at some of your pictures on flickr.
Great, the full moon is already on my desktop


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