> Hmm. ISO 200. Streaking in Red and Blue channels.
>
> Possible solutions:
> - add exposure

A *longer* exposure time?  Wouldn't that make it worse?

> - drop to ISO 100 and see whether you get the same

I'll give that a shot if I get to retake these shots tonight.

> - mask the red and blue channels, do some noise reduction processing

How would I do this?  All I have right now for processing PIFs is the Pentax 
software, which I know you said you don't like.  That software is so slow on 
my machine that using it is painful.  I suppose I could convert to a DNG and 
process in ACR, too.  Those are my two options.  How would you recommend I 
go about this ?

Thanks,
John

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