DA70 and 24x36 coverage

[Godfrey DiGiorgi]

On Oct 1, 2007, at 11:46 AM, Boris Liberman wrote:
> I am asking my question mainly because if it indeed covered full frame
> and there were no image deterioration past the APC frame, Pentax
> probably would have given it FDA designation instead of DA.

The D-FA mount includes an aperture ring control. DA lenses do not.

The DA70 has no aperture ring control, it was design for use with the  
digital SLR bodies. Whether it actually covers 24x36 mm format isn't  
really relevant to the mount designation.

Godfrey

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Not really relevant but interesting:

In the course of researching my latest lens acquisition, I saw an  
article about someone who took an M42 mount Pentax Fish-Eye-Takumar  
17mm lens and cobbled up a mount to fit it on a 6x6 rollfilm folder  
with behind-lens leaf shutter. His goal was to make circular fish eye  
images inexpensively ... it produced an image circle ~ 45mm in  
diameter on the 6x6 format film, which suited his needs perfectly.
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