Sent: Tuesday, June 01, 2004 3:16
PM
Subject: Re: [APML] PENTAX 6X7 FOCUSING
PROCESS QUESTION
Hello John:
You need a camera where you can remove the focusing hood
(like the Pentax 6x7). Get a good small high power loupe (10 -
22X) from a camera store and make a mounting bracket (I used modelers
plywood) that will hold the loupe the correct distance from the focusing
screen so it will be in focus. This should be done in daylight.
For my Pentax 6x7 I used the connecting pins to hold my bracket in the correct
position. I drilled a hole in the bracket to hold the loupe over the
correct portion of the screen -- the small para-central ground glass ring
on the standard P67 screen. Now when you go out to do your
astrophotography, the bracket will hold the loupe over the correct area of the
screen and it will be at the correct distance from the screen. Now just
center a star and focus your telescope. Using this technique makes it
easy to focus and I have never had a failure.
----- Original Message -----
Sent: Tuesday, June 01, 2004 12:31
PM
Subject: [APML] PENTAX 6X7 FOCUSING
PROCESS QUESTION
Hi group,
Is there any way to focus
directly on the focusing screen, and if so, what is the best
way?
Thanks
John
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