Pentax 67 and astrophotography, multiple exposures

Does anyone have info or experience with the Pentax67 system

and astrophotography? I would like to do multiple exposures,

prime focus and piggyback shots. Would also like any info on

focusing screens, meter prisms & magnifiers for this application.

 

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I currently use a Nikon F3 but would like to move up to MF.

Planning on P67, 55mm/4, 90/2.8, and maybe 200/4.

Can get t-ring adapter for telescope-P67 through Lumicon.

 

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Thanks for any info,

 

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Phil Lau (starshot@ix.netcom.com)

 

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http://www.geocities.com/CapeCanaveral/2217

Pentax 67 can not do multiple exposure unless modified by Pentax facility in Colorado. From What I read on the net, it cost a couple of hundred an a few weeks for the modification.

I have "upgraded" my P67 at Pentax-Germany with multiple exposure, mechanical bulb exposure and the grid screen. All together was about 600 German Marks (equals 350$).

I use the normal TTL-Prism (works with full moon shots!) and the waist level finder. For critical work, I use no finder and a 10x magnifier directly on the screen.