Re: [APML] Medium format cameras

["Steve Walters" <s-walters@comcast.net>]

Dean,

I've not done any widefields with the Pentax lenses myself but there are
plenty of excellent results using them. Besides John's work, two others come
to mind:

Matt BenDaniel at http://starmatt.com/
Kirk Rogers at http://www.kiroastro.com/

Between these sites, I think you can see photos taken with every 67 lens
available. As I mentioned earlier, the 67 lenses do not vignette due to
their optical design.

Clear skies!

Steve...

----- Original Message ----- 
From: "Dean Jacobsen" <deanjacobsen@earthlink.net>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Saturday, November 08, 2003 11:20 PM
Subject: Re: [APML] Medium format cameras


> Steve, do you have any experience with the Pentax 67 and the Pentax
> lenses?  What started me down this road was some of John Gleason's wide
> field photos of the Milky Way with the 105mm and 165mm lenses.
>
> Dean Jacobsen
> www.astrophoto.met
>
> At 09:48 PM 11/8/2003 -0500, you wrote:
> >The Pentax 6x7 vignettes all by itself. It is meant to use with camera
lens
> >designs in which the final lens elements are enlarging the light cone
much
> >as a barlow does. The 6x7 lens mount does not allow full illumination of
the
> >film when most telescopes such as refractors or refractors are used.
> >
> >This was one reason I abandoned the 6x7 for the Mitsuboshi system.
> >
> >Steve...
> >
> >----- Original Message -----
> >From: "Phillip Jones" <starfest@comcast.net>
> >To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> >Sent: Saturday, November 08, 2003 8:25 PM
> >Subject: Re: [APML] Medium format cameras (was:Tak. FSQ-106 for
> >mediumformatfilm?)
> >
> >
> > > Alan,
> > >
> > > I should probably add that the focuser on the FS-102 is a 2.7"
focuser,
> > > which was designed for 6x4.5 medium format. My understanding is the
Pentax
> > > 6x7 is too large for the 2.7" focuser, which is why there is not a
Pentax
> > > 6x7 adapter available for the .2.7" focuser sized FS series
refractors.
> > >
> > > However, you might consider getting the 6x7 for piggyback photography
for
> > > now, and hang onto it in the event you get a 4" focuser refractor in
the
> > > future.
> > >
> > > -Phil
> > >
> > > ----- Original Message -----
> > > From: "Alan Voetsch" <critter12952@yahoo.com>
> > > To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> > > Sent: Saturday, November 08, 2003 2:25 PM
> > > Subject: [APML] Medium format cameras (was:Tak. FSQ-106 for medium
> > > formatfilm?)
> > >
> > >
> > > > Hey all,
> > > >
> > > > The discussion between Dean and Kirk has gotten me thinking about
> > > > moving up to a medium format camera. Actually I've thought about it
> > > > many times, but I only now have an instrument that can utilize MF.
The
> > > > Tak FS-102 will be able to handle that format and once I'm
comfortable
> > > > with it and the new G-11 with Gemini, I would consider trying a
bigger
> > > > format camera.
> > > >
> > > > What I would like to know is if anyone has a tutorial, or such on
their
> > > > website regarding this. Or barring that, can anyone give any
pointers
> > > > on what to look for in such a camera. The reason I ask is that I saw
> > > > one advertised on astromart last week that had a purge system
already
> > > > installed. This camera had been used on a 102 and I assume that the
> > > > user knew what he was doing. My assumption has always been that a
> > > > camera body is basically just a film holder. I'll qualify that by
> > > > saying that I would probably also use it for piggyback shots.
> > > >
> > > > All things being equal, is the camera manufacturer important here?
Are
> > > > there certain things to look for? To avoid? Is a Pentax 67 the wise
> > > > choice in the long run?
> > > >
> > > > What I really want is to be pushed in the right direction so when I
do
> > > > have the cash for such a purchase, I hace done my homework and can
jump
> > > > on it then without screwing up. At that point, I would like to know
of
> > > > any adapters, etc... that would be necessary. Any guidance would be
> > > > much appreciated.
> > > >
> > > > Thanks,
> > > > Alan
> > > >
> > > >
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