Re: [APML] Monday's Astro Photo of the Day

[Matt BenDaniel <matt@exceloncorp.com>]

Roger,

That's one of the best fixed tripod Milky Way shots I've seen.  IMO it could be made even better with a little anti-vignetting and a bit of curving.

The CTIO shot has spherical aberration, too:
http://www.noao.edu/image_gallery/images/d2/02221x.jpg


At 04:05 PM 5/14/01 +0100, Roger Wesson wrote:
>The only film I've tried from really dark skies for this sort of shot
>was Fuji super HG1600, when I was at Ayer's Rock .  I think the HG
>stands for 'Huge Grain', but it recorded a lot in 20s.  You can see it
>here:
>
>http://www.worldtraveller.f9.co.uk/astro/photos/southern/milkyway1.jpg
>
>It was taken with an Olympus OM-1, 50mm lens at f/1.8.  Not the most
>spherical of stars, but at least there are a lot of them.  And I can see
>M6, M7, M8, M16, M17, M23, M24 and the Pipe Nebula.  I didn't know what
>to expect, and when I got this back I was absolutely delighted.  I
>BGSmoothed it, by the way.
>
>As I have no means of guiding my camera, I thought I'd have a go at
>stacking lots and lots of short exposures of the milky way.  I took a
>whole roll of the northern milky way, on Superia 800, but all my
>exposures were a little bit too long so all the stars trailed.  I'm far
>too busy to set about processing and registering 36 images 

Actually, that is a piece of cake with RegiStar scripts.
The hard part is scanning the film.

>for probably
>mediocre results right now, but I might have a go at some point.
>
>Roger
>
>
>Chuck Vaughn wrote:
> > 
> > Matt,
> > 
> > In this sort of test I'll bet that Konica 3200 (is it still made?) would
> > out perform all the other films. When it first came out there were a
> > number of 30 second unguided Milky Way shots that recorded a lot. These
> > days one could shoot 32 twenty second exposures and stack them to reduce
> > the grain. It would only take 20 minutes to do it. The color of nebulas
> > is closer to tricolor than any color film I've seen.
> > 
> > Chuck <aa6g@aa6g.org>
> > 
> > ---------------------------------
> > 
> > > This brings up a question.  What emulsion (hypered or unhypered, color or
> > > black&white, any developing process) gathers the most light in 20 seconds?
> > > Let's say all we are trying to produce is a web-resolution black & and white
> > > image like this one.
> > >
> > > T-MAX 3200?
> > >
> > > How would a 20 second exposure compare with this one?
> > >
> > > In Astrophotography for the Amateur I recall seeing a 30 second color exposure
> > > of the milky way on a fixed tripod by Akira Fujii.  We should be able to do
> > > even better today, because films have progressed, right?
> > >
> > > Matt
> > 
> > --  APML Archives at <http://www.system.missouri.edu/apml/>  ---
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--
Matt BenDaniel
matt@starmatt.com
http://starmatt.com

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