Focal ratio = 816 mm, F/8.0
The center element is Super ED. Strehl ratio is 99.2% !!!
It works with the TOA reducer yielding F/6.0 with an image circle of 50 mm.
Priced at 252,000 Yen for TSA-102N (fixed dewshield)
and 273,000 Yen for TSA-102S (retractable dewshield)
I think it is a suggested retail price. The real price should be lower (maybe

Anat