TS Ploessl 12.5mm
Sharp within 30° apparent field of view, towards the edge a little bit worse.
x-axis: distance from optical axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
The apparent field of view is approx. 49°
Very good contrast because of good multicoating and use of just four lenses.
Simple, but not bad. Unfortunately no blackened filter thread.
Very good and inexpensive Ploessl. Astonishing large field of view, therefore the loss of sharpness towards the edge is acceptable. The real field of view is larger than for the 15mm Ploessl of this series!