Siebert 67mm 40deg eyepiece for afocal

[Second Time Around]

I spoke to Harry Siebert yesterday and asked whether he could make a 67mm 40 deg eyepiece at a reasonable cost.  His answer was yes.  He could also make even longer focal length eyepieces for 2.5" and 3" drawtubes.

As a newcomer to night vision I don't want to miss anything.  Aside from having a screw thread on the eyecup is there anything else that would need to be considered?  Eye relief perhaps?

[Highburymark]

TeleVue is now offering a conversion lens for its 55mm plossl which turns it into a 67mm ep. Don’t know how much the Siebert option would be, but if you’re using the TNVC adapter with the 55mm plossl, then the conversion lens makes more sense

[Second Time Around]

Harry Siebert estimates the cost at $200-300. That's tempting having just spent over £6000 this week!

Luckily with the OVNI-M I can use it at prime focus as well as afocally.

Edited July 20, 2020 by Second Time Around