Test
Results
Art. –Nr. SKY-LE-20
Skywatcher Long Eye Relief 20mm
Sharpness:
Very good in principle, but the sharpness is only achieved when looking
into the eyepiece under a certain angle. If you look straight, only about 25°
field of view are really sharp.
x-axis: distance from optical
axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
Field of view is approx. 47°.
Contrast:
Very good.
Aberration:
Very slight cushion distortion, minor chromatic errors (colored fringes)
towards the edge.
Eye Relief:
Very comfortable, if neglecting the turning of the head, if you would
like to see the edge as sharp as the center.
Mechanical Quality:
Good quality with rubber eye guard, grip coated body.
Summary:
Also: take other eyepieces, if you do not need this long eye relief.