I have the universal (refractor + reflector) model and a set of the 21mm eps.
Only used in my 4" refractor so far, and I love it.
If the clouds dissipate tonight (not looking good ATM) and I get to have first light in my reflector, I will give it a try. However the truss poles have not been trimmed yet and it may not reach focus even with the OCS adapter.
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