Art. –Nr. BA-OR-09
Baader Planetarium Genuine Ortho 9mm
Sharpness:
Very good sharpness nearly over the whole field of view. Especially to
the edges better than our Plossl- and Super Plossl eyepieces.
x-axis: distance from optical
axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
The apparent field of view is about 41°.
Contrast:
Really good contrast.
Aberration:
Very small pincushion distortion.
Eye Relief:
Eye relief is a bit short, as expected. If you do not worry about that,
the look into the eyepiece is fine.
Mechanical Quality:
The very good quality is described on the main ortho page.
Summary:
In comparison to the Super Plossl eyepieces on the cheaper side the
advantage is better edge sharpness, better contrast and lower sensitivity to
reflexes. Its called a fine eyepiece all around, and that is correct.