Test Results

 

Art. –Nr. SKY-LE-09

Skywatcher Long Eye Relief 9mm

 

Sharpness:

Poor for a 9mm eyepiece.

 

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

 

Apparent Field of View:

Field of view is approx. 48°.

 

Contrast:

Between good and very good.

 

Aberration:

Noticeable cushion distortion. Chromatic errors (colored fringes) towards the edge.

 

Eye Relief:

Very comfortable.

 

Mechanical Quality:

Good quality with rubber eye guard, grip coated body.

 

Summary:

The long eye relief lens combination is clearly an optical drawback. Take other eyepieces, if you do not need this long eye relief.

 

 

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