TS Super Ploessl 40mm
Very good over the complete field of view.
x-axis: distance from optical axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
The apparent field of view is approx. 36°.
Very good contrast because of good multicoating and use of just four lenses.
Slight cushion distortion, nearly not noticeable.
Comfortable at this long focal length.
Nice. You do not need more to use it for a long time.
Nice eyepiece. But not the right one, if you would like to have a large apparent field of view.