Re: [APML] Poor Blue in 400F?

[Alen Koebel <akoebel@rogers.com>]

Nice shot. 

I can see I have my work cut out for me. I wasn't
really expecting much at 30 minutes, I was just
expecting *something* (anything! <g>).

I have tried taking two images back-to-back for the
purpose of stacking before. On this same roll in fact,
of M31. I won't bother stacking them because they're
BOTH out of focus! Even using a knife-edge focuser,
which usually never fails me, I managed to screw
something up. <g>

Thankfully, I do have one good M31 shot, perfectly
focused, and taken on a night of superb transparency.
At only 30 minutes it's undeniably thin, but I know
the Photoshop wizards here could do something
wonderful with it. Whether *I* will be able to do so
is another story! <g>
 
--- jmize <jmize@svic.net> wrote:

> Alen, try stacking images.  Stacking helps greatly,
> more than you'd expect, no matter whether it's film
> or DSLR.  Take the extra time and make that second
> exposure.  Save the setup effort and composing the
> second image.  It pays off in the long run, so much
> so that I always took double shots before I went
> over to the dark side.  The extra image and stacking
> practice paid off with better images and more
> experience when I entered the realm of CCD's.
> 
> This M45 was on one of my last out dated rolls of
> Kodak Royal Gold 200 Select, hypered 12hrs.  Even
> with 2x45min exposures I also worked hard to get
> decent blues.  Shudda taken that extra third
> shot...joe  :)
> 
> http://www.cav-sfo.com/M45.html
> 
> 
> "May You Go Among The Imperishable Stars"
> 
> Joe Mize:     jmize@svic.net
> StarFields Observatory   http://www.cav-sfo.com
> Chiefland, FL    29:24'33.4"N    82:51'37.7"W
> Moon Phase:    
> http://tycho.usno.navy.mil/cgi-bin/phase.gif
> ----- Original Message ----- 
> From: "Lane, Jason R" <jason.lane@navy.mil>
> To: "Discussion of Film Astrophotography"
> <astro-photo@seds.org>
> Sent: Monday, August 22, 2005 10:44 AM
> Subject: RE: [APML] Poor Blue in 400F?
> 
> 
> 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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