[Wavytone]

DSomeone suggested vixen copied Nagler. I doubt it - the idea of the Smythe lens predates both - which both Nagler and Vixen used (as well as ES, Pentax and Nikon not to mention Baader and the cheap Chinese clones). The Smythe lens idea is the basis of every UWA eyepiece design.

The other point is the LVW set spanned the range from 3.5mm which is as about as short as anyone could usefully want, right up to one that has a field stop as large as can be squeezed into a 2" barrel (the 42mm) - and all can be used with a 2" focusser and weigh close enough that there's no balancing needed. There still isn't another set that does this.

And as for focal lengths Vixen made the largest range of focal lengths bar none in the LV range (ceased manufacture years ago). Something for every one there - 2.5 - 50mm.

As for the SSW... an 82 degree field in a 2" barrel works out at roughly 30mm focal length, and between that and 14 mm there's a factor of two, so slotting one in at 21 mm would make a decent set.

The only snag is the SSW's are small and don't have a dual 2" barrel which rather suggests Vixen won't make a 21 or 30, or if they do they'll be oddballs. Pity.

TV created the same problem in that to span this range you need a clutch of Naglers and a couple of Panoptics.