It has a focal length of 250 mm, and uses a sensor whose size is 7.68mm x 4.32mm.
Thin lens approximation gives a projection of atan( 7.68/250 ) by atan( 4.32/250 ), or an FOV of about 0.03 radians by 0.017 radians (about 1.7º x 1º). Height that is just a shade under the size of 2 full moons.
Hint: neither M31 nor North America Nebula will fit in the frame without the use of mosaics.
Chen