Re: [APML] 2 More ST-4 questions

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

Stuart, I was using Elitechrome 200.

Yes it was at F9 through my newly aquired AP152 F9 refractor.

Unless my slides came back from the developer in the wrong order (they are
unfortunately not numbered), this one was 3 minutes.

The longer exposures were better on M44 but I am not that adept with
Photoshop yet to transpose the 3 minute Jupiter onto a 15 minute M44.

I did try a little star shaping per Matt Ben Daniel's wonderful web site

Eddie Guscott


----- Original Message -----
From: "Stuart Heggie" <stuart.j.heggie@sympatico.ca>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Sunday, April 27, 2003 3:29 PM
Subject: Re: [APML] 2 More ST-4 questions


> Eddie, that is a nice shot!
> What film were you using and what were you shooting through that is f/9?
> Three minutes at f/9 is not a lot of time no matter how fast your film!
>
> Stuart
>
> Eddie Guscott wrote:
>
> > Stuart
> >
> > I think your 20 min exposure may have overexposed Jupiter sufficiently
for
> > you not to see it's moons.
> >
> > I tried several shots a few weeks ago, ranging from 1 min thru 15
minutes.
> >
> > The 3 minute was best. At 7, 10, 20 minutes the overexposed glare around
> > Jupiter overwhelmed the moons (at F9)
> >
> > You can see my 3 minute attempt here:
> >
> > http://www.astropics.co.uk/jupiter_m44.jpg
> >
> > Eddie Guscott
> >
> > ----- Original Message -----
> > From: "Stuart Heggie" <stuart.j.heggie@sympatico.ca>
> > To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> > Sent: Sunday, April 27, 2003 1:34 PM
> > Subject: Re: [APML] 2 More ST-4 questions
> >
> > > Oddly, it was clear as a bell here in Southern Ontario (but cold
still,
> > near 0C).
> > > Our club had an imaging workshop so I went with my portable SP mount
and
> > 4"
> > > refractor. I piggybacked my shorter lenses for some constellation
shots.
> > Took a
> > > 20min guided-by-eye shot of Jupiter in the Beehive with a 180mm ED
lens
> > (Supra 400
> > > at f2.8) - maybe too long given how bright Jupiter is. Will see. The
rest
> > were 10
> > > min tracked-not-guided 50mm and 24mm shots of constellations (Leo, Big
> > Dipper,
> > > Hercules, Scorpius).
> > >
> > > Stuart
> > >
> > > steve banbury wrote:
> > >
> > > > Hi John/Alan--
> > > >
> > > > "John C. Mirtle" wrote:
> > > >
> > > > >     Ha! Got you beat - we are in the middle of a full-blown
blizzard.
> > It's
> > > > > chest deep with snow in parts of my yard, and it is supposed to
keep
> > snowing
> > > > > until Monday. Looks like this new moon is a wipe-out as well.
> > > >
> > > > We have rain here in Calif, and Alan's weather in Oregon doesn't
sound
> > any
> > > > better.
> > > > Isn't anybody having decent weather?!!
> > > >
> > > > The way I look at it-- the rate of change in temperature on the CCD
must
> > be
> > > > greater when actively being pulled down from ambient
> > > > by a Peltier device compared with the rate of change when passively
> > drifting
> > > > back up.  Still it might not be a good idea to drag the CCD into a
70
> > degree
> > > > house from your snow laden back yard as soon as you're done imaging
or
> > guiding.
> > > >
> > > > Steve
> > > >
> > > > _______________________________________________
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