crop factor on older lenses

Started Jun 6, 2014 | Questions thread
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mbower
mbower Regular Member • Posts: 167
crop factor on older lenses

Ok, my next question -

I understand crop factor and that my 45mm lens is equivalent to a 90mm lens in the 35mm world.

But how do I calculate the crop factor for an older lens?  I have the adaptor that lets me attach my Nikon 35mm prime to my M43s body.

What is the general crop factor that should be applied when one uses older lenses?

TIA

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Michael Bower
Ashburn, VA

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