[APML] Determining camera FOV on starchart??

["Gerry Cichocki" <gcichocki@hotmail.com>]

Hello group, cloudy on the east coast, praying for clear skies for the Black 
Forest Star party this week!
I'm trying to make a clear overlay for my  uranometria starcharts that would 
be the approximate FOV that my 35mm camera sees when using a 10"  SCT/F10 
(2500mm FL) running prime focus.
I understand 35mm film is 24mm X 36mm. The FOV of the scope at F10 is 33 arc 
min x 49.5 arc min.
How do I translate this to the starchart for an overlay?

Then what would the camera FOV be at F6.5 using a focal reducer?

Thank you, in advance, Gerry


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