DA70 and 24x36 coverage

[J. C. O'Connell]

If the comments below are true, it's bad. The lens designation
should convey if a lens wont cover 24x36mm IMHO. A APS-C only
lens is not the same thing as a 24x36 lens and there should be
an easy way to know by the lens designation IMHO.
jco

-----Original Message-----
From: pdml-bounces at pdml.net [mailto:pdml-bounces at pdml.net] On Behalf Of
Godfrey DiGiorgi
Sent: Monday, October 01, 2007 3:37 PM
To: Pentax-Discuss Mail List
Subject: Re: DA70 and 24x36 coverage


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

---
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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