I am looking at these 2 eyepiece for a possible purchase of one.The specific use will be for the North American neb using an OIII filter.My views have been great,but I want more TFOV and exit pupil for the f7,f7.5 fracs and it will work well in the f4.8 dob.
Has anyone compared these 2 EP's on the Veil,NA neb for contrast?My 18mm ES at least equals my 16mm Nagler on contrast,so I was wondering how the 30mmES 82 and 31mm Nagler compare in this regard.
I am also in Ontario and observe in a 20 SQM sky. A bunch of us used an O-III filter, and a 30mm eyepiece on this same target and were underwhelmed. The skies need to be better than that to REALLY see it in all it's glory.
The rest of the gang there didn't even confirm seeing it, but I saw it and all I saw was a hazy mist barely brighter than the background sky.
Good luck, you're really gonna need it!
Markus,I agree that SQM 20 mag skies make the North American neb difficult,but up here I have easy access to 21.5 mag skies.Last trip out it cracked 21.6 and the NA neb,Veil were easily seen no filter in my 10" dob.With my Astronomik OIII the Veil was bright,with nice twisted structure and the NA neb,esp the "Gulf" was very contrasted,with a little detatched patch showing next to it ("Gulf).You did very well to see it in mag 20 skies,good observing.
I use my 21mm Ethos for my OIII viewing,but want to try a bit bigger TFOV on the NA neb.Long story but I have tried my widefield frac on it and the 10" dob is much better...I know about the debate about "exit pupil is all that matters,not aperture"LOL!I am still playing with that one.
I have an 18mmES 82 and other 16mm-18mm quality EP's,the only one that actually out contrasts the 18mm ES is my 17mm Ethos.I love this 18ES,doesn't frost up much...So I'm just wondering if the big 30mm ES would offer similar performance to the 18mmES in terms of image contrast with an OIII.ES does have a competeing set of coatings to Naglers,but Ethos,Delos are a step up IMHO.
Edited by jetstream, 08 August 2014 - 07:35 AM.