Archived posting to the Leica Users Group, 2005/01/25

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Subject: [Leica] Phat
From: neal at (Neal Friedenthal)
Date: Tue Jan 25 20:24:46 2005


>What happens when you put an 8mm fisheye lens for a standard 35mm film
>camera on a 1.5 ratio digital camera? What happens to the depth of
>field...and is it still a fisheye? Late night musing minds want to know....


Depth of field remains the same no mater what size the "targett" is, be it 
full frame 35mm or 1.5 ratio or as in this case 1.6 ratio.  When this lens 
is mounted on a full frame 35mm it produces an almost 
circular image, slight flat area on top and bottom of a horizontal 35mm 
frame.  In the Canon 20D with its 1.6 ratio only the corners of the frame 
are cut, I usually crop this out. As far as it being a fisheye, 
fisheye lenses are designed to distort and the distortion is still there.