Art. –Nr. RE-UWA-30
Ultra Wide Angle 30mm
Sharpness:
Very good at the center, somewhat worse to the edge.
x-axis: distance from optical
axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
Our measurement gives 72° - somewhat less than the manufacturer data.
Contrast:
Very good contrast.
Aberration:
Noticeable cushion distortion and field curvature.
Eye Relief:
Not even huge, but comfortable viewing distance.
Mechanical Quality:
Simple, but good quality with rubber eye guard, grip coated body. Fully
multicoated and blackened inside.
Summary:
This is a very low-priced 80° panoramic eyepiece. At F/5 you will find
50 to 60% of the field in very good image quality, up to the edges “comet tails”
become prominent. The field curvature is obviously contrary to that of a
Schmidt-Cassegrain, which makes this eyepiece especially recommendable for
these type of telescopes. This eyepiece is known as “BW30” or “Moonfish” also.