RE: [APML] Poor Blue in 400F?

["Lane, Jason R" <jason.lane@navy.mil>]

Hi Alen,

That sounds about right for 400F.  At f/5, shooting at Pleiades with 400F, 30 minutes is too short for the reflection nebula to show up well.  I've shot it at f/6 for 45 minutes and haven't gotten much.  What I did get required a lot of histogram stretching to be even half-decent.  I'd say don't bother with anything less than an hour exposure shooting Pleiades with 400F.

Unless they are actively trying to, developers at the automated photo labs can't screw up slide processing, and really can't screw up the negatives either.  What you see is what you got.  Heck I take mine to Wal-Mart to get developed and they turn out just fine.  Scan it and tinker, that gets you the good results.    :)

Hope this helps,
Jason



-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Alen Koebel
Sent: Friday, August 19, 2005 6:08 AM
To: APML
Subject: [APML] Poor Blue in 400F?


I just got some recent 400F slides developed and I am
very disappointed with the blue response. For
instance, a 30 minute f/5 shot of the Pleiades yielded
NO reflection nebula at all. What the..? I got decent
blue response from the last roll of 400F and certainly
more than this even from E200. Could the lab have
screwed up the processing? Tired chemicals? I tried
this supposedly very good lab for the first time on
the recommendation of a fellow APer, so I have to
wonder. The film itself was fresh (Dec 2006 expiry),
was kept refrigerated until the day I started using
it, didn't experience high heat and I had it developed
a couple weeks after I took the pictures. 

You know, even if this isn't a lab problem, I've had
myt fair share of them (which is why I tried a new one
this time). I'm tired of them compromising, and in
some cases ruining, my efforts. I think it's finally
time to take them out of the equation. I hate to say
it but next year it's goodbye to film for me and hello
DSLR. 
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