Art.–Nr. SKY-UWA-09
Skywatcher Ultra Wide Angle 9mm
Sharpness:
Very good sharpness within 60° apparent field of view, just a little bit
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. 66°.
Contrast:
Very good contrast.
Aberration:
Slight cushion distortion.
Eye Relief:
Comfortable.
Mechanical Quality:
Good quality with foldable rubber eye cup.
Summary:
Large apparent field of view for little money combined with good optical
performance. The eyepiece is recommended for use with F/5 or slower optics.