TS Super Ploessl 20mm
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. 45°.
Very good contrast because of good multicoating and use of just four lenses.
Slight cushion distortion.
Comfortable. May be you fold the rubber eye cup to easier view the complete apparent field.
Nice. You do not need more to use it for a long time.
A very good one.