Test Results

               

Art.–Nr. TS-SP-04

TS Super Ploessl 4mm

 

Sharpness:

Not convincing, especially in the center. Even at 4mm there are better ones. Our measurement system is diffraction limited at this focal length to about 1.4 arc minutes.

 

x-axis: distance from optical axis in °, y-axis: resolution in arc minutes

 

Apparent Field of View:

The apparent field of view is approx. 48°

 

Contrast:

Just good contrast.

 

Aberration:

Very slight cushion distortion.

 

Eye Relief:

Very short eye relief because of the short focal length. Viewing the complete field of view is not possible without looking into the eyepiece under different angles.

 

Mechanical Quality:

Nice. You do not need more to use it for a long time.

 

Summary:

Not too bad for a 4mm eyepiece – but I have seen better ones.

 

back