RE: [APML] 'Astrophoto Program'

["Mike Matassa" <mjmatassa@hotmail.com>]

Eyepiece projection is really only useful for bright objects, such as the 
moon, Jupiter, Saturn, and Venus.  Dim objects would require VERY excessive 
exposure times.


>From: Saint Machiavelli <saint@manetheren.net>
>Reply-To: astro-photo@seds.org
>To: astro-photo@seds.org
>Subject: RE: [APML] 'Astrophoto Program'
>Date: Mon, 19 Feb 2001 08:01:39 -0800
>
>I sent a copy to you, including the vbrun300.dll that Scott Barbee sent me
>last night.
>I do have one question about it though. This is for anyone who has played
>with eyepiece projection photography.
>According to this program using a Meade 8" SCT in eyepiece projection mode
>with a TeleVue Plossl 21mm, the film plane 5' I have an f/stop of f/50.5 
>and
>an exposure time of 60 hours to photograph the M1 Crab Nebula on Kodak 400
>PPF with the milky way slightly visible.
>I think I've drastically missed something in my research on eyepiece
>projection photography, as I have never had any indication that it would
>require such an f/stop or take so long.
>
>On the other hand the program has already cleared up some of my 
>calculations
>on Prime Focus, which helps to explain why my first set of deep sky photo's
>Triangulum galaxy (M33) came out like they did, all faded and dark.
>
>   -----Original Message-----
>   From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
>Behalf Of warren and amy keller
>   Sent: Monday, February 19, 2001 4:58 AM
>   To: apml
>   Subject: [APML] 'Astrophoto Program'
>
>
>   Does someone have the website with the downloadable program- you plug 
>your
>optical system in and it gives size of Messier objects on film and exposure
>hints? I lost it in a system crash. I think it''s at a New England Club's
>site.
>
>   Anyone have an extra F2 cable release or 400mm/5.6 that is compatible
>they'd like to sell?
>
>   Thanks, Warren!

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