Re: [APML] The frustrations of a half-exposed film

["Eddie Guscott" <eddie.guscott@blueyonder.co.uk>]

Chris

Hope you get some keepers.

How did the dew prevention go??

Eddie Guscott

----- Original Message ----- 
From: "Chris Heapy" <chrish@easynet.co.uk>
To: "'Discussion of Film Astrophotography'" <astro-photo@seds.org>
Sent: Friday, October 03, 2003 11:02 PM
Subject: RE: [APML] The frustrations of a half-exposed film


> All who responded....
> 
> OK., thanks, you're right - it's off to the developers tomorrow! I'll
> shoot the rest of the film on anything I can find around the house
> first. 
> 
> The f-stop is governed by the Genesis SDF, and I've varied the exposures
> between 30min and 60min. For focus I use a magnifying eyepiece onto the
> focussing screen. I watched the ST4 most of the time, and I recorded a
> log of the corrections so I can check on the mount. The vast majority of
> the corrections were <1" (guiding at 1250mm, imaging at 540mm). My
> concern is whether there's any differential flexure from using a
> separate guidescope. I'll let you know... :-)
> 
> ChrisH
> 
> -----Original Message-----
> From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org]
> On Behalf Of Roland Roberts
> Sent: 03 October 2003 22:09
> To: astro-photo@seds.org
> Subject: Re: [APML] The frustrations of a half-exposed film
> 
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> 
> >>>>> "Chris" == Chris Heapy <chrish@easynet.co.uk> writes:
> 
>     Chris> My first film (a 36exp) is sitting in the camera half used
>     Chris> up. Nothing but clouds on the horizon for the next week,
>     Chris> and then a full moon. It's awfully tempting to get it
>     Chris> developed! It's not knowing whether the mount is guiding OK
>     Chris> that's bugging me. I've got a significant investment
>     Chris> (exposure time) in that one film already. I wish I could
>     Chris> cut my other 36exp films up and load into 12exp canisters,
>     Chris> but I suppose I would lose a lot doing that?
> 
> Develop it!
> 
> Seriously, you've already hit the nail on the head with the comments
> about what you don't know all because you haven't developed the film.
> In fact, you may not know a lot of other things that developing the
> film would reveal: do you know if you got the f/stops and exposure
> times correct for your location (sky fog limit)? do you you know if
> you got the focus right?
> 
> Covington has a few remarks about this kind of false-economy in his
> book.  It was the best thing I ever read.  Yeah, the people behind the
> counter thought it was odd when I told them the roll only had one
> exposure on it.  I got over the embarrassment and they know me now.
> 
> roland
> - -- 
>        PGP Key ID: 66 BC 3B CD
> Roland B. Roberts, PhD                             RL Enterprises
> roland@rlenter.com                            6818 Madeline Court
> roland@astrofoto.org                           Brooklyn, NY 11220
> 
> -----BEGIN PGP SIGNATURE-----
> Version: 2.6.3i
> Charset: noconv
> Comment: Processed by Mailcrypt 3.5.4, an Emacs/PGP interface
> 
> iQCVAwUBP33leeoW38lmvDvNAQFfiAP/RPwIPnqKQWrUkyh3nNIPCROWLiMs3lIq
> Gg/Dzzeo6w7Ou0A5fvTRf1dZV1d3iEdnuqmIeBGxfsXNYJwp3Kq0bfxgAmhUwzO4
> UsfcHjC81MO6VM87PfKbNF0zJUD89rA+Dea5r0cahaMt/iHXkX0FArYcxBIPtYsI
> RFkSYOF/GuM=
> =bnJy
> -----END PGP SIGNATURE-----
> _______________________________________________
> 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
> 

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