G'day there Paddy,
If you are looking at EPs around 10 mm then you might also be interested in the 9 mm TMB/Burgess. 60 deg. AFOV, reasonable ER and very respectable performance to boot! Around $140 from Frontier Optics.
On the other side of 10 mm is the 12 mm Pentax XF. A bit dearer at $215, again 60 deg. AFOV and a generally accepted good performer.
I have an 18 mm TV Radian and like it but if you don't want to pay that much for one EP you can have the 32 mm TV Plossl and a 9 TMB/Burgess for less than a Radian.
Decisions, dedicisions.
Mark.
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