RE: [APML] E200 star image size.

["Jon Kolb" <jkolb@datawest.net>]

Hi Jason,

> I have scanned E200 for people and recently tried
> it myself. It records nebulosity well but the star
> image sizes appear to larger than most films. In
> my Schmidt Camera the larger stars  were
> as much as 2x larger than that of Tech Pan. 
> 
> Has anyone measured star image sizes of E200 compared
> to other films of similar speed? (chromes or negatives).

I haven't measured them myself, but they definitely do blow out on long
exposures, and it seems to happen with faster slide films as well.  I
noticed it a lot more when I was shooting at f/3.3 with the Epsilon, but
it still happens at f/7.9 with the faster Provia 400F film.  That's one
reason to push process the film instead of exposing longer.

Sincerely,
Jon Kolb
Adventures in Astrophotography
http://home.datawest.net/jkolb/
Life Member, International Dark-Sky Association
jkolb@datawest.net



_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo