[APML] Pentax 6X7

[Dean Ketelsen <ketelsen@as.arizona.edu>]

Hello All-
	I am in the process of constructing a telescope for astrophotography
that is capable of providing a large flat field and am interested in 
feedback concerning a camera to design it around.  The Pentax 6X7 seems
to be in popular use amoung many of you and the use of a medium format
camera one can use for non-astronomy applications is a draw over a devoted
system for this telescope.  I see many of you use yours at F/5 to F/6 -
is there vignetting at these speeds caused by adaptors or the mounting
flange?  There would certainly be some at the F/3.6 to F/4 of the system
I'm envisioning.  I'd be interested in hearing any comments regarding
the Pentax camera or if you would have other recommendations, either on
list or off.  Thanks in advance.

					-Dean

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