ditto the above...
for the most part i'd say the eyerelief on a 3.5mm would be very tight too (execptions are there of course $$$). i have a 200mm f/6. most of teh time even on planets i dont go higher than 160X, on one very rare occassion of exceptional seeing i went up to 184X on jupiter. If i want to split tight doubles (the only reason to go higher) i just throw a barlow in.
