|
I have some old Meade 4000 9.7mm and 26mm eyepieces. They are very sharp on axis and have good contrast but the AFOV is only 52 degrees. They are parfocal and that is nice, saves having to refocus.
I also have GSO superview 10, 15 and 30mm eyepieces. The contrast is not as good but the 68 degree AFOV is better. The 30mm is a 2" and has a 1.5 degree TFOV in my 12" scope.
The true field of view (TFOV) is aproximately equal to the apparent (AFOV) divided by the magnification.
|