----- Original Message ----- 
From: "Godfrey DiGiorgi"
Subject: Re: Pentax SMC 15mm f/3.5 on digital


>
> As I said, not "none" but insignificant. You're looking at image
> examples with nothing other than default conversion to JPEG direct
> from RAW at 1:1 pixel size. You would likely not see any in an A3 print.

I haven't gone looking for problems with either the 14 or 12-24, and the 
only time I have seem CA from these two lenses is in torture test scene 
types.
I don't think it is possible to completely eliminate it in the extreme 
retrofocal designs that the flange to focal plane distances/ focal length 
ratios have forced into the lens designs.
At some point, you have to decide if you want to take pictures and learn to 
compromise a bit, or take up ice fishing.

William Robb 


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