I hear you Peter , in my friends 16 inch GSO dob his 9mm Delos runs rings around my 9mm Nagler ( sort off
) but it is sharper , true .
But in my 127mm Istar the 9mm Nagler is better than the Delos ?? .
Also in my 127mm Istar my 13mm T1 Nagler is un-distigushable from another friends 13mm Ethos ( except the FOV ) man a 1990's eyepiece against a 2013 baby , we tried these two 13mm's in lots of scopes saturday night and the only thing my 13mm T1 lost out on was weight , it hassled the Dobs some what
.
Love my 13mm T1 , a classic beauty .
Then we tried the 13mm Ethos in the 22 inch ( see my thread in 'star parties , club events etc. ) and it stayed there all night , what a combo !! , but just for a lark on a mag 15 galaxy we swapped the 13mm Ethos for my 17mm T4 Nagler and guess what ??
.
The Nagler showed the faint fuzzy better
. Same AFOV .
We all had a great night swapping and changing eyepieces in scopes , fun , and wish you all were there .
.
Yep Refractors rule when it comes to testing eyepieces , sorry to say .
Brian.