I have quite a few to choose from and asking for 3 favourites is liking asking someone to name their favourite child. While most of what I own has now been around for a long time, and I've owned for a long time, I haven't used too many eyepieces that I like better, apart from a couple mentioned below. I'm happy with what I have and have no intention to change eyepieces, or telescopes.
31mm Nagler T5
27mm Televue Panoptic
25mm UO HD orthoscopic
22mm Nagler T4
20mm Pentax XW
18mm UO HD orthoscopic
17mm Nagler T4
14mm Pentax XW
13mm Televue ETHOS
12mm UO HD orthoscopic
12mm Nagler T4
10mm Pentax XW
9mm UO UO HD orthoscopic
8.5mm Pentax XF
8mm Televue Radian
7mm Pentax XW
7mm UO HD orthoscopic
6mm Televue DELOS
6mm Televue Radian
6mm UO HD orthoscopic
5mm Pentax XW
5mm UO HD orthoscopic
4mm UO HD orthoscopic
3.5mm Pentax XW
As part of our 3RF eyepiece kit, I also have access to all of the ETHOS focal lengths, but I rarely use an ETHOS eyepiece, because I prefer long eye relief and to observe with my glasses on. Pre COVID we had a lot of overseas people attending OZSKY. They always bring a collection of high class eyepieces with them, which I also get to try out.
Of the eyepieces I own my 3 favourites and most used eyepieces are:-
17mm Nagler T4 (critical to use a paracorr with this one)
10mm Pentax XW
7mm Pentax XW
Of the eyepieces I have used but don't own, the best eyepiece I have used is without question the 17mm Nikon NAV HW. It gets no better. The 2nd best would be the 12.5mm Docter Optics. The Leica Zoom is also very nice but zoom eyepieces just aren't for me.
Cheers
John B
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