I believe the internal barrel diameter is around 28 mm for a 1.25 inch
eyepiece. This is the maximum field stop diameter which determines the
maximum
possible Fielf of view.

The focal length of the scope in question is something like
8.75*80mm=700mm

The field of view will be 28mm/700mm = 0.04 radians x 57.3 deg/rad = 2.3
degrees.

2 inch focuser will be significantly greater..



Thanks for the answer. It is 1.25". If I upgraded to a 2" focuser with a
1.25" adapter,
would I still get the increase in FOV? According to that formula, I would.
Is that the case?
Do I need 2" EP's to get the increase in FOV? Even if I don't, 2.3 degrees
isn't too bad.