RE: [APML] Another beginner

["RJS" <bseabold@mn.rr.com>]

I was using Corel photo...not nearly as thorough as Photoshop but a good
beginning tool(ie less expensive) as it includes similar tools...I played
around with the curves of brightness, contrast...Covington gives a good
discussion of digital manipulation in the new edition of his book, also
there is a recent Sky and Telescope article by Matt BenDaniel in the april
2002 issue about curves with a good discussion on histograms.

Incidentally, I use an OM-1 with a 28mm...tonight I'm going to try a
recently purchased 135mm...but I am using a friends tracking mount.

Also, besides bracketing for time, bracket for stops...its informative to
see how time and fstop change.  Don't forget to take notes...

Bob Seabold



-----Original Message-----
From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
Behalf Of Lewis V. Bishop
Sent: Saturday, June 15, 2002 5:28 PM
To: astro-photo@seds.org
Subject: RE: [APML] Another beginner


All,

>Firstly, what sort of SLR are you using. You should be able to get some
good
>results even with a fixed tripod setup.

The first roll of film was taken with a Yashica AF230 SLR and a 35-70mm f4
lens. Varied shots were taken (f numbers + exposure time) and there are a
few that are okay. The second roll was taken with a Olympus OM-1 (borrowed
to see the difference between a low f-stop and my Yashica f4 lens) with a
Zuiko 500 lens at f1.4 with various exposure times. I have read Michael
Covingtons book and he states more than once that you should not take shots
at less than a certain stop - it was higher than 1.4 and i can't find the
reference now.

It was encouraging to see the 2 images posted by Bob Seabold. My pictures
have a similar look to the unprocessed one and it is remarkable what can be
done to improve them - unfortunately i have not had as good a result when
trying to adjust them - what procedures did you run the picture through Bob?

Many thanks for the comments so far - my next tries will be a variation on
stopping the lens down and using a faster film (i was using 400) as well as
bracketing... i guess as well it's all trial and error.

Thanks,

Lewis.





--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>