Test
Results
Art. –Nr. SKY-LE-15
Skywatcher Long Eye Relief 15mm
Sharpness:
Sharpness is decreasing already near to the optical axis, therefore just
moderate.
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:
Chromatic errors (colored fringes) towards the edge.
Eye Relief:
Very comfortable.
Mechanical Quality:
Good quality with rubber eye guard, grip coated body.
Summary:
Better than the 9mm, but also here the long eye relief lens combination
is clearly an optical drawback. Take other eyepieces, if you do not need this
long eye relief.