Skywatcher Ultra Wide Angle 6mm
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. 68°.
Very good contrast for an eyepiece of 6mm focal length.
Slight cushion distortion.
Comfortable at all. You have to keep the right distance to the eyepiece, otherwise you will see blackouts.
Good quality with foldable rubber eye cup.
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.