Re: [APML] Provia concensus roundup

["Bert Katzung" <katzung1@attbi.com>]

Hi Herm:
Probably not relevant to your question (you're interested in long exposures,
right?), but my experience with Provia 400F and the Leonids certainly raised
my opinion of it in relation to Centuria 800 and (ugh) Supra 800.
http://www.astronomy-images.com/images/Solarsystem/leonid-meteor2002.htm
I shot mostly Kodak Supra 800 (unfortunately) thinking that for 20 and 30
sec meteor shots, its lousy reciprocity characteristics wouldn't matter.
Turned out that it was very underexposed at f/3.3 for 30 seconds. The Konica
Centuria did a little better, but not nearly as good as the Provia --- with
no push processing. I got better stars and a much better meteor on the
Provia than on either of the print films. Having given up on Supra 800 for
deep sky stuff a long time ago, I will now expunge it from my mind for any
purposes whatsoever! I plan on using Provia 400F for all my astro-emulsion
imaging after my supply of E200 runs out, and I will try the 1 and 2 stop
push that people are recommending.
Bert

Bert Katzung
katzung1@attbi.com
www.astronomy-images.com

----- Original Message -----
From: "Herm" <hermperez@worldnet.att.net>
To: <astro-photo@seds.org>
Sent: Tuesday, November 26, 2002 4:29 PM
Subject: [APML] Provia concensus roundup


> There are many of you experimenting with Provia film.. a quick reply with
> your opinions would be appreciated. I'm looking for a fine grain film with
> decent performance in the blue (good for galaxies) and decent red
response.
> Please state the speed of your system and general exposure times for the
> Provia family of films.
>
> No film will ever match E200 for red sensitivity but it does suffer in the
> faint blue stuff (galaxies).. strangely enough I have found E200 to have
> good response to bright blue sources such as the Running Man and Trifid
> nebulas.. but it really does not do a good job on galaxies like hypered
> print film.
>
>
> Herm
> Astropics http://home.att.net/~hermperez
>
>
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