I do ORTHO! although I came to Orthos rather late in my observing life.
Currently I have 4, 6, 9, 12.5 and 18mm Fujiyamas (which I find quite excellent BTW) and I came to have them via a rather odd and twisted path. Today - I am an eyepiece-a-holic, but it wasn't allways like that.
First, some history. I got my first scope at about age 12 - a 60mm vari-power refractor that I modified by removing the internal erecting lenses, shortening the tube, and attaching a zoom microscope eyepiece. I lusted after the various scopes in S&T that I would read at the local library. Dreamed of having a Unitron or a Cave or - well any "real" scope - and have a set of Orthos as they were supposed to be the best. Obviously my world was a lot simpler back then and I didn't know of or understand "eye-relief" or things like that. Needless to say - I didn't get any other scope besides my tube-shortened, microscope zoom eyepiece alt-az 60mm refractor, and I didn't buy any other eyepieces either. (BTW that little scope did launch a passion that continues to this day).
My first serious (adult) scope was a 10" Eq-mounted newtonian and I had a 25mm Kellner, and 32 & 13mm TV Smoothie Plossls (I still have and use the Plossls). Those where my only eyepieces for many years. I bought the TV Plossls in 1982.
When I got one of the Altair 102mm F11 ED scopes last year I started doing more lunar and double star observing. Used the TV Plossls (I also have 20, 15, 11, and 8mm modern TV Plossls) but I wanted a little higher power than the 8mm TV - so I bought a 6mm Fujiyama. Really liked the view.
Then I got the itch for a zoom eyepiece as it seemed I was switching eyepieces a lot, especially doing Lunar observing. But I needed something around 6mm and the TV 3-6 zoom seemed to be too high a magnification, and things like the Baader 8-24 too low (and I don't get along with Barlows). So - instead of a zoom eyepiece I bought an old Celestron/Vixen 1.25 turret and used the 6mm Fuji, with the 8, 11, & 15 TV Plossls as a surrogate for a zoom eyepiece. Gotta say - I really liked the result.
BUT - the 6mm Fuji is far from parfocal with the TV Plossls. I could have used parfocal rings on the TVs in the turret but I use the Plossls with other scopes occasionally and didn't want to do that, besides.......as I said: I'm an eyepiece-a-holic. So - I decided to buy more Orthos (as I really liked the 6mm and the set would be parfocal). First added the 4, 9, and 12.5 - then later the 18. I'll switch out the 4 for 18 if I use the turret on one of the Maks but the 4 - 12mm set works great for lunar, planetary, and double stars with the 102mm ED. The eye relief has not been a problem for me. In retrospect, I could have bought the TV 3-6 zoom and used it with the Plossls in the turret for about the same $$$$. Oh well.
With other scopes, I have other eyepieces to use - so the Orthos are used mainly in the 80mm and 102mm refractors, or the 90 or 125mm Maks - which are the scopes I most often use for lunar, planetary, and double stars from the light polluted back yard. When I take the 16" to a dark(er) site I'll usually take the Naglers or ES 82's - although it sounds like I should try the Orthos with the Dob when doing galaxies. I need to try that.
In summary - a long twisted path to eventually obtain eyepieces like those I dreamed about when in my early teens.
So, a long story, but YES! I DO ORTHO!
Edited by Don Taylor, 11 April 2020 - 08:13 PM.