TS Super Wide Angle 15mm
Very good sharpness within 50° apparent field of view. Turns worse close to the edge.
x-axis: distance from optical axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
The apparent field of view is approx. 60° - less than given by the manufacturer data.
Very good contrast.
Very slight cushion distortion.
Good quality with foldable rubber eye cup.
A nice wide angle eyepiece. At F/5 you will see some aberration close to the edge, but you can use it for this focal ratio or slower.