Art. –Nr. BA-OR-18
Baader Planetarium Genuine Ortho 18mm
Sharpness:
Perfect 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 40°.
Contrast:
Really good contrast.
Aberration:
Very small pincushion distortion, nearly not recognizable.
Eye Relief:
The look into the eyepiece is just 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, a little bit better contrast and lower
sensitivity to reflexes. Its called a fine eyepiece all around, and that is
correct.