Hi,
off the top of my head, Pentax and Celestron without adapters. Probably forgot some lesser known brands.
If the eyepiece mount is wide enough, adapters are possible. Kowa big body line and Zeiss Diascope come to mind.
In general, the main question for all adaptions is whether the eyepiece will come to infinity focus (or at least far enough for birdwatching if astro is not of interest).
As for wide angle EPs, the usual criterion is 60 deg apparent field of view or more. Only the long focal length and thus low magnification ones might vignette due to prism size. You can use a short focal length Nagler or Ethos in a spotter just fine w/o vigneting... if they come to infinity focus in your instrument.
Joachim
Can only comment on products I have tested with UWA eyepieces. So the Pentax would be guess workAnd the Pentax 65?
I couldn't find anything on the APM site but bought one of these Swarovski Astroadapter many years ago. They only had a limited number made, patterned on the original adapter when Swarovski offered a rebadged 6 mm Vixen LV for 77x on the AT80/ST80.APM sell a swaro 1.25” bayonet adapter, very little info on using wide angle eyepieces with it.
Peter
Yes, but Ethos are on other league!!! Besides having much wider AFOVs, Ethos are also much more comfortable to use. The 5mm 1.25" Ethos clones need less infocus than TV so reach focus on more spotting scopes... If money is no problem and 1.25" Ethos reach focus, I would go for the Ethos - these are the originals, not the copies... Unfortunately Ethos don't have eye-relief enough for most eye-glass users like me...... Type6 naglers are good, cheaper than Ethos! ...
I remember an old publication by Zeiss about very wide eyepieces. They found that anything over 90 degrees made most observers very uncomfortable in terrestrial viewing.I fear I might fall into the eyepiece with a 110def field - if I could see all of it in one go, I have found I can’t see the field stop with some very wide eyepieces.
Don't test a 100º AFOV ep if you don't want to buy one...Stop giving me thoughts to get a XWA 13mm! (13mm being my general working eyepiece for moderate magnification - I have a 5mm Nagler for high power.
I fear I might fall into the eyepiece with a 110def field - if I could see all of it in one go, I have found I can’t see the field stop with some very wide eyepieces.
Peter
It depends on the observer and the eyepiece...I remember an old publication by Zeiss about very wide eyepieces. They found that anything over 90 degrees made most observers very uncomfortable in terrestrial viewing.
Hermann
Hi David,Don't test a 100º AFOV ep if you don't want to buy one...
I tested an Ethos and had to get an Ethos 17... Than, other 92º, 102º and 110º "came" to me...