Test Results


Art.–Nr. TS-SW-20

TS Super Wide Angle 20mm



Very good sharpness within the complete apparent 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. 62° - a little bit less than given by the manufacturer data.



Very good contrast.



Slight cushion distortion.


Eye Relief:

Not too easy. You will need some practice in finding the correct distance where the center as well as the edge provide a sharp image at the same time.


Mechanical Quality:

Good quality with foldable rubber eye cup.



A nice wide angle eyepiece. At F/5 you will see noticeable aberration close to the edge. Recommended for F/6 or slower.