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Re: [APML] A Fresh Lens Recommendation Thread
Brian take a look at John Mirtle's page if you like Ha work. he has some of
the best Ha/Tech Pan shots I've seen!
http://members.shaw.ca/jmirtle/
Jim Ives
----- Original Message -----
From: "Brian Larmay" <astrobri@ameritech.net>
To: <astro-photo@seds.org>
Sent: Tuesday, December 17, 2002 10:26 PM
Subject: Re: [APML] A Fresh Lens Recommendation Thread
> O wow mike...
>
> I remember looking for this page a few times but I had lost it....Those
wide
> field H-a images by Steve are awesome...its the whole H-a thing that gets
> me!
>
> http://www.galaxyimages.com/gallery.html
>
> This might be my only alternate due to me moving to a light polluted area
in
> a few months
> I know its ccd but hey.
>
> Brian
>
> Freeze this moment
> A little bit longer
> Make each sensation
> A little bit stronger
>
> Make each impression
> A little bit stronger
> Freeze this moment
> A little bit longer
>
> My photography:
> http://www.astrobri.com
>
>
> ----- Original Message -----
> From: "Mike Cook, AF9Y" <mwcook@concentric.net>
> To: <astro-photo@seds.org>
> Sent: Tuesday, December 17, 2002 9:03 PM
> Subject: Re: [APML] A Fresh Lens Recommendation Thread
>
>
> > You might be interested in this approach if you haven't already seen it:
> >
> > http://www.galaxyimages.com/focus.html
> >
> > Of course with a CCD, only the center FOV of the lens would be used so
> > the performance would be even more impressive.
> >
> >
> > Mike
> >
> >
> > >From: stephen pitt <lthuedk@pe.net>
> > >
> > > > This might be an ideal lens for use with an ABG CCD like the
ST-2000.
> I wonder
> > > > if RoboFocus could be adapted to drive it.
> > >
> > > I don't know. The focus ring is ~2.5" in dia, located in the center
of
> > > the lens, which is 9.5" long. I too would like very much to attach a
> > > CCD camera to this optic. You probably noticed slightly elongated
stars
> > > at the top of the corner shots, but the degree is rediculously small.
> > >
> > > While no correction in a camera lens can be perfect, this SD has very
> > > low chromatic aberration-about what one would expect in a very good
ED.
> > >
> > > I shoot at Joshua Tree, where the skies are fairly dark. As I said
> > > elsewhere, the lens will vignette with other films of less contrast
and
> > > broader value range, especially when clarity is down. But its never
> > > objectionably bad. On a bad night, I'm sure there would be some
> > > vignetting with the EII at f2.8. Unfortunately, I made no notation to
> > > that effect on the sample night. Clearly, it was a good night.
> > >
> > > Stephen
> > >
> > >
> > > >
> > > > Mike Cook
> > > > AF9Y
> > > >
> > > > Date sent: Tue, 17 Dec 2002 14:42:17 -0800
> > > > From: stephen pitt <lthuedk@pe.net>
> > > > To: astro-photo@seds.org
> > > > Subject: Re: [APML] A Fresh Lens Recommendation
Thread
> > > > Send reply to: astro-photo@seds.org
> > > >
> > > > > Hi Mike, sure:
> > > > >
> > > > > http://www.light-to-dark.com/corners
> > > > >
> > > > > >From the 2700 dpi image. Stephen
> > > > >
> > > > > "Mike Cook, AF9Y" wrote:
> > > > > >
> > > > > > Stephen,
> > > > > >
> > > > > > That looks quite impressive, especially if it was taken at
> F/2.8.
> > > > > > Could you show a 1:1 crop of the corners to give us an idea of
> > > > > > how good it really is?
> > > > > >
> > > > > > Mike Cook
> > > > > > AF9Y
> > > > > >
> > > > > > Date sent: Tue, 17 Dec 2002 10:26:13 -0800
> > > > > > From: Stephen Pitt <lthuedk@pe.net>
> > > > > > To: apml <astro-photo@seds.org>
> > > > > > Subject: [APML] A Fresh Lens Recommendation
Thread
> > > > > > Send reply to: astro-photo@seds.org
> > > > > >
> > > > > > > In my previous post, I recommended the Tokina 2.8 SD. Here is
a
> > > > > > > positive taken with it:
> > > > > > >
> > > > > > > http://www.light-to-dark.com/EII
> > > > > > >
> > > > > > > When viewed over a lightbox, the stars are perfectly pin
> pointed.
> > > > > > >
> > > > > > > Stephen
> > > > > > >
> > > > > > >
> > > > > > > -- APML Archives at <http://astro.umsystem.edu/apml/> ---
> > > > > > > Unsubscribe at <majordomo@seds.org>
> > > > > > >
> > > > > >
> > > > > > Mike Cook, AF9Y
> > > > > > http://www.af9y.com
> > > > > > mwcook@cris.com
> > > > > >
> > > > > > -- APML Archives at <http://astro.umsystem.edu/apml/> ---
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> > > > >
> > > >
> > > > Mike Cook, AF9Y
> > > > http://www.af9y.com
> > > > mwcook@cris.com
> > > >
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> > >
> >
> >
> > Mike Cook, AF9Y
> > http://www.af9y.com
> > mwcook@cris.com
> >
> >
> >
> >
> >
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