2 inch GSO Barlow
Posted 14 January 2013 - 08:59 PM
Posted 14 January 2013 - 09:14 PM
It seems to me, just off the top of my head, that to use that barlow with those hybrid eyepieces in 1.25 mode would require something like a "high hat" adapter; the GSO-supplied low-profile adapter would not securely hold the Ethos, I think, because the 2-inch barrel would get in the way. Using the high-hat adapter, a.) you would need significantly more in-travel than otherwise and b.) you'll wind up with noticeably greater than 2X magnification, since you've moved the focal plane of the eyepiece out from the barlow element. OTOH, if you use the eyepiece as-is in 2-inch mode, you might indeed get less than 2x mag--perhaps someone with direct experience can speak to this. But an alternative might be to get the 2-inch barrel extension and use the eyepiece in 2-inch mode in the barlow--but I'm not sure how that compares in height to the high-hat adapter.
Posted 15 January 2013 - 07:47 PM
Posted 16 January 2013 - 10:20 PM
Posted 17 January 2013 - 07:45 PM