|CCD & Telescope
To use this
simple calculator, you need to check the specifications of the CCD chip for your camera
that comes with the manufacturers specifications. When entering the focal length you must
take in to account any focal length shortening (reducers) or barlow lenses etc that alter
the telescopes effective primary focal length.
For non-square CCD arrays you'll need need
to enter the values for pixel size and number of pixel for each axis of the array to get a
final "A" x "B" field of view result. For example, our GSTAR-EX camera
yields a view on a T.V monitor roughly 20 x 14 arc minutes with our 10-inch 254mm f/5 Sky-Watcher Newtonian.