Soligor Ploessl 15mm
Very good sharpness for the whole 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. 46°.
Like the Skywatcher and TS Super Ploessls.
Without any reservations: recommendable. That is what I call a perfect Ploessl.