TS Ploessl 10mm
Sharp within 30° apparent field of view, blurry towards the edge.
x-axis: distance from optical axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
The apparent field of view is approx. 45°
Very good contrast because of good multicoating and use of just four lenses.
Simple, but not bad. Unfortunately no blackened filter thread.
Good and inexpensive Ploessl. Just the blurry edges are bothering.