Archived posting to the Leica Users Group, 2004/06/20

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Subject: [Leica] Erwin on the new M-50/1.4 ASPH/digital sensor size question
From: telyt at earthlink.net (Doug Herr)
Date: Sun Jun 20 17:35:52 2004
 
on 6/20/04 3:09 PM, animal at s.jessurun95@chello.nl wrote:

> When the sensor size changes so does the focal length doesn,t it?Why does
> the aperture stay constant ?Isn,t the f number a ratio of diameter divided
> by focal length?
> Simon
>

The focal length doesn't change.  What changes is how much of the image
circle is used.  It's a crop factor, not a focal length factor.

Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com
Replies: Reply from s.jessurun95 at chello.nl (animal) ([Leica] Erwin on the new M-50/1.4 ASPH/digital sensor sizequestion)
Reply from red735i at earthlink.net (Frank Filippone) ([Leica] Erwin on the new M-50/1.4 ASPH/digital sensor sizequestion)
 In reply to: Message from s.jessurun95 at chello.nl (animal) ([Leica] Erwin on the new M-50/1.4 ASPH/digital sensor size question)