I so wish TV would have made a 5mm Ethos that was a match to the 6 and 8 Ethos. Meanig 100° same size shape and weight. Even the 4.7 Ethos would be ok if it were the same specification as the 6 and 8.
I would own one for sure but will never get either of their 110° eyepieces.
I recently compared the 4.7mm Ethos SX, the 5mm Delite, and the 5mm T6 Nagler in my 12.5" (with Paracorr) on Saturn and Mars.
Sharpness on axis--4.7 Ethos SX was sharpest.
Sharpness halfway to edge of field--4.7mm Ethos SX was the winner
Sharpness at the edge of the field (just in from it)--4.7mm Ethos SX was the winner.
Stuck a Baader Contrast Booster filter on the Paracorr and compared views of Mars: sharpest with most details seen--4.7mm Ethos SX.
None of the 3 had noticeable astigmatism at the edge.
None of the 3 had serious light scatter, though all 3 showed a trace of scatter in the immediate vicinity of the planetary disc.
All 3 showed 6 moons of Saturn (thanks to my phone program which identifies where each moon is)but they were easiest in the Ethos SX (probably due to having a magnification 23x higher).
The 7th visible moon was hiding.
I don't care about the 110° field because I typically let it drift from 75% on one side of center to 75% on the other when viewing, giving me 50 seconds between nudges of the scope.
But I'd miss the sharpness and field size. It's allowed me to see 5 moons at Uranus, too.
I use it as a 2" with the adapter on it.
Edited by Starman1, 13 August 2016 - 05:30 PM.