E. Suter Aplanat B view angle

[SpringHo]

I read from this forum, saying that aplanat A (F6) view angle is 60 degree, what about Series B? larger? Does any one know it is 70 degree or 80 degree?

[SpringHo]

refer to Emil busch catalogue, aplanat F8 series, 75 degree. Can I consider Suter one will be similar?

[Steven Tribe]

yes.

The coverage of RRs/Aplanats is dependent on the selected F values.
So the 25x20" Suter Aplanat B (no. 9) sold a few days ago on ebay will cover more than this!