Re: [APML] Another one from New Mexico

["John C. Mirtle" <spampit@shaw.ca>]

Nice one Jon!
    I have this same region shot on Provia 400F using my Schmidt, and I also
found it difficult to nail colour balance on this field. It looks to me like
there may be differences in the rate of reciprocity failure between the 3
colour layers with 400F. The darker bits always seem to need a different
balance than the brighter bits. I don't plan to continue using 400F. Your
shot came out much nicer, probably due to the longer FL and large format. No
tinkering required! I have a "close-up" version of B86 at
http://members.shaw.ca/astrophoto/n6520.htm which shows a bit more detail
taken with an 8" f6 - no colour balance problems with this shot. :-)  Tough
to shoot, as I live so close to the north pole!

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: "Jon Kolb" <jkolb@datawest.net>
To: "'Discussion of Film Astrophotography'" <astro-photo@seds.org>
Sent: Friday, June 27, 2003 8:28 PM
Subject: [APML] Another one from New Mexico


Between work commitments and a boatbuilding project that I'm determined
will get wet before Fall, I've been remiss in my image processing.  This
is another shot from the recent New Mexico adventure that I've been
staring at for several weeks, barely tweaking a thing the whole time.
<-snip ->
image processing folks on the list will have a better recipe in mind for
processing this one, and I look forward to hearing your suggestions -
including those from inveterate tinkerers.

http://home.datawest.net/jkolb/b86-b90.htm

Sincerely,
Jon Kolb
Adventures in Astrophotography
http://home.datawest.net/jkolb/
jkolb@datawest.net



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