>Thanks for the warning :) I have 15 rolls of old supra 400 in fridg. but one >day I'll have to buy other films for astrophoto.Well, i shoot right now only wide field too, and i use only E200 pushed two steps. That gives me 640 ISO equivalent. I don't care too much of the "bigger" grain (ideed this film has a very "thin" grain [i can't remember the appropiate word]), because i try to stack multiple exposures, and always make SGBNR or other noise reduction task.
>all the images on his gallery >http://www.ifa.hawaii.edu/~wang/gallery/gallery.html are beautiful !!!Yes, they are amazing. I saw an "all sky" pick that is really good. He taked it with a homemade camera and a Canon FishEye lens.>I shoot only wide field , I'm not sure that I'm concern about the >chromatic aberration.Yes, you have chromatic aberrations too (if you are shooting without apochromatic optics like the rest of us ;-) ). Perhaps not so severe as you can find in some achromatic wide field scopes like de celestron's (or synta's), but if you look carefully you'll see it. My Canon lens (50mm and 135mm) have a lot of chromatic aberrations, when seeing the images at full size when scanned at 2700 dpi.You can see some pics in my lens-testing page:
Regards,
Carlos Milovic F.
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