Test Results

               

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.

 

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