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.