RE: [APML] Opinions: Best 28mm Lens for Pentax or Olympus?

["Koebel, Alen" <Alen.Koebel@christiedigital.com>]

> Most wide angle lenses are not that good astrophotography-
> wise until they get stopped down a couple of stops.

Very true. I'm not expecting a 28mm lens to do pinpoints (or
reasonable facsimiles thereof) in the corners at f/2.8. But I 
*am* expecting that if I stop down to f/4 (which is, I realize,
only one stop). I'm hoping someone can recommend a lens that 
can do that. 

> If you decide to go with the Olympus, I have a 28mm-f/2.8
> for $80. Condition is like new.

You can predict my next question (g): Is it sharp in the 
corners at f/4? 

Maybe there isn't a 28mm lens out there that can do this. But, 
IIRC, I have seen 28mm photos that show this kind of performance
at f/4. I just don't know exactly which lenses were used. Maybe 
not Olympus (Zuiko) or Pentax lenses. But I'm not going to buy 
yet another camera body just to use a certain lens or two (g).

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