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03-11-2009, 01:08 AM   #1
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manual lens focal length


I have a couple of manual lenses that I use but I jst want to check: when you start the camera (k20d but I think its the same as I had the same thing with K100) it asks you to set the focal length ... so do you:

- set the focal length as is ie 50mm is 50mm or
- set the focal length as multiplied by 1.5 ie 75mm

I assume its the latter but I just wanted to check.


03-11-2009, 01:16 AM   #2
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I enter the the FL of the lens itself.

FYI - I think this is only for SR, because when my SR is off, it doesn't ask that.

03-11-2009, 01:24 AM   #3
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ok, thanks. I always have SR on so I never noticed that.
03-11-2009, 04:16 AM - 1 Like   #4
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You enter the focal length of the 50mm.

A 50mm lens, whether a manual one made in 1980, or one made now specifically for the crop-sensor DSLR is still a 50 mm lens. Its focal length cannot change no matter what camera you mount it on.


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