It says it's a triplet, with two ED glass elements.
These are faster than their current ED 80mm that is an f/7.5, same as the scope I have the C80ED, a doublet. I'm guessing the shorter FL needs more attention to CA and SA. Probably a wider corrected field for imaging.
Sounds good, looks great, but way out of my league. (I'd rather have the Tak 102 if given the choice.)
Maybe one of the optics boys can give a comment on the two ED glass elements.
They are on the web page under 'New Products.'
I'd bought (and very briefly owned) the 104mm - paid full price $2800 about a month ago. That included rings and dovetail. (The EON 85 is $1800.) So I don't know where the $3500 comes from.
I didn't get a chance to use it at night, but observed the sun with objective filter (of course), a few sunspots visible in shimmering poor seeing, and terrestrially from my balcony, using the Pan 35. The optics seemed razor sharp, especially in viewing buildings and such a block or two away - not that that's an ultimately suitable test. (Btw, love that Pan 35 - the most comfortable EP I've used.)
I returned the 104mm, not because of anything wrong with optics or fit and finish, but I thought it too heavy and clunky for its aperture - 14.6# + 2" diag, EP, 9x50 RACI all add up quickly to about 18#, and with mount - total = 32-33#. More than I wanted for a quick grab n go. Not easy for me to slip it on and off the mount (Orion StarSeeker goto). This is not to knock the product, just wasn't for me. And while the black and red seems so cool, that also ended up being not to my taste, as the fully mounted scope will be a permanent resident in my living room, right next to the balcony sliding glass door.
So I went in an entirely different direction and ordered the TV 85mm, with Vixen Porta Mount II Tall+ - total weight with all accessories about 24-25#. I realize, of course, that the 85 won't show quite as much as an 104mm, but the extra portability for my purposes wins the day. My observing is in Grey, city/suburban very LPd skies. And, from all reports, pro and users here, the TV 85 gets great reviews. So I'm looking forward to getting it in the next week or two, so Company Seven says, where I ordered it (and all stuff).