I have to admit to being less enthused about this focal length. I rushed out & bought the 13mm Ethos & have been delighted with it, but at these shorter FLs I am basically wedded to Pentaxes.
Mark's idea of getting a brace of 13mm Ethoi is more compelling to me, since these are unmatched as immersive binoviewing/binoscoping eyepieces (assuming your head isn't too narrow
).
btw here is the earlier report I posted about binewting them:
http://www.iceinspace.com.au/forum/s...497#post279497