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Phoenix Astronomical Society

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-   Astrophotography and Sketching (http://www.pasaz.org/forums/forumdisplay.php?f=7)
-   -   Prime Focus Question (http://www.pasaz.org/forums/showthread.php?t=496)

Dan Evander 12-01-2010 02:23 PM

Prime Focus Question
 
Now that I have a working powered German EQ mount I am ready to do the deed with prime focus. I've been told that I need to move the mirror up the tube and need some guidance.

I have an 8" newtonian and I think an f8 at 1200mm or 48". I have all of the connections for my two dslr's.

Any idea how far up I need to move the mirror assembly? Thanks.:confused:

Dan Evander

Sam Insana 12-03-2010 11:47 PM

Prime focus
 
I have an 8 inch newtonian reflector, an F6, with a focal length of 1200 mm, and there are two sets of screws to move the mirror. It is a 4 cm move on my scope to get to prime focus. Take care, Sam Insana


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