Re: [APML] Usable films in 4x5?

["John Boudreau" <jeboud@comcast.net>]

> The sample Jerry pointed me to looked grainy .... and I'd be shooting at 
> f/7, thus doubling the times quoted on the web-page ....

Hi Dave,

That shot _isn't_ really a good indication of the fine grain of 100F, which until recently was widely considered the finest-grained color film out there. That M42's main exposure was only 60 minutes, cut short because M42 was getting well into a light pollution dome--- an earlier 90 minute shot was ruined by an ST-4 glitch, and had originally been planned for 2 hours. The result you see was stretched pretty hard, resulting in the grainy appearence--- it's also a tight crop as it was only imaged at 480mm f.l.

Stephen Pitt has a few 100F images on his website that do the film more justice:
http://www.light-to-dark.com/nebula_index.html

And while the images at the links below have some grain reduction done, there aren't many films around fined-grained enough to capture these subjects well, even at 3300mm:
http://home.comcast.net/~jeboud/m57.htm
http://home.comcast.net/~jeboud/ngc2392.htm
http://home.comcast.net/~jeboud/ngc6543.htm

The Cat's Eye was actually *just* less than 1 mm wide on the film !

I would expect the Kodak E100S to be nearly as fine-grained, and probably will have better H-a response than 100F though.


John Boudreau
http://home.comcast.net/~jeboud/astro.htm


----- Original Message ----- 
From: "David B. Toth" <ve3gyq@amsat.org>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, January 20, 2004 11:28 AM
Subject: Re: [APML] Usable films in 4x5?


> At 04:22 PM 1/20/2004 +0800, Wei-Hao Wang wrote:
> >Hi Dave,
> >
> >As Jerry suggested, Provia 100F is a good one.
> >Another one worth trying is E100S.  It may not
> >be as fast as E200, but has much better color
> >balance, satuation, and resolution (comparing
> >to E200).  It's discontinued but still available
> >in B&H.
> >
> >clear sky.
> >
> >Wei-Hao
> 
> Thanks Jerry and Wei-Hao ...
> The sample Jerry pointed me to looked grainy .... and I'd be shooting at 
> f/7, thus doubling the times quoted on the web-page ....
> 
> Maybe I'll look at the E100S ...
> 
> 
> Dave
> 
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
> 


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