Archived posting to the Leica Users Group, 2009/02/06

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Subject: [Leica] Is the DOF using a digital sensor any different than that of film?
From: henningw at archiphoto.com (Henning Wulff)
Date: Fri Feb 6 15:53:40 2009
References: <BLU0-SMTP504288C23B0AA68D8D767D8CC00@phx.gbl> <9b678e0902051925v4dd7d486pd58bff41a6434fae@mail.gmail.com> <BLU0-SMTP472FC431CEE402999C8AAB8CC10@phx.gbl>

>Bingo!
>
>That's it - the 50mm with a cropped frame is a different perspective 
>than a true 100mm lens !!!!
>
>Or to truly exaggerate the phenomena, use a very wide angle lens, 
>and crop the image to equivalent to the longer focal length (e.g 
>18mm cropped to what a 75mm will show).  I'm thinking the image will 
>have the perspective of the 18mm lens (i.e. large nose if image is a 
>face), but image size might be equivalent to the 75mm.



The image will have the perspective that you associate with a 75mm 
lens, but the image size will be smaller (cropped)



>DOF is whatever the 18mm lens aperture was set at.
>
>Right?
>

If you enlarge it the same (it will be smaller)





>Vick
>
>
>Don Dory wrote:
>>  Vick,
>....; you will however get a different perspective as the crop 
>sensor will not include as much of the scene.
>>
>
>
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-- 

    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com

In reply to: Message from vick.ko at sympatico.ca (Vick Ko) ([Leica] Is the DOF using a digital sensor any different than that of film?)
Message from don.dory at gmail.com (Don Dory) ([Leica] Is the DOF using a digital sensor any different than that of film?)
Message from vick.ko at sympatico.ca (Vick Ko) ([Leica] Is the DOF using a digital sensor any different than that of film?)