Re: [APML] Tech Pan Development question

["Jim Ives" <flyboy9990@earthlink.net>]

Hi Kent,
    I plan on trying it with a 135mm f/2.8 telephoto. I also have a 70-300
f/4 zoom that I thought I could tape the zoom down. It's kind of tight
anyway.
    I've been shooting Hyped RG200 lately. I thought I would try hypering it
for 90hrs in a Lumicon 300 tank with a hand pump.

Jim
----- Original Message -----
From: <KGKIRKLEY@aol.com>
To: <astro-photo@seds.org>
Sent: Monday, January 21, 2002 10:01 PM
Subject: Re: [APML] Tech Pan Development question


>
> In a message dated 1/21/02 4:40:14 PM, flyboy9990@earthlink.net writes:
>
> >Hi Kent,
> >
> >    I do have some Hypo Clearing Agent too. I'm glad I bought it! I'm
going
> >
> >to start out shooting prime focus with a SCT @ f/10 without a filter. I
> >
> >thought later once I get useto it I might try a Ha filter. I don't want
> >to
> >
> >get into the filtered shots yet. I would like to but want to practice
with
> >
> >it first. I guess it would help to extend the rinse times ah?
> >
> >Jim
>
> Jim:
> Are you using Hypered Tech Pan (I hope?).
> Tech Pan is an incredible film. It is very red sensitive, which is why it
> works so well for emission nebulae. This is where the Ha filter comes in.
For
> objects that aren't red emitters, like most galaxies, don't use a filter.
>
> I don't intend to sound negative, but an f/10 optical system will mean
long,
> long exposures. Depending on object, easily an hour or much more, even if
> it's hypered.
>
> Kent Kirkley
>
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