NavList:

Dear Alex, you wrote:

“When you focus on wires (so that they look as sharp as possible), then you automatically

focus on any remote object (Sun, Moon, a star or horizon).”

 I think you wrote this according to your expierence with SNO-T sextant’s inverting scope. Yes, indeed, it allows to focus the scope to the infinity, looking at the wires. As I mentioned in my previous post, in my SNO-T I find that I still need to finetune the focus slightly, when looking at celestial bodies. But it is maybe because of myopia.

In SNO-T inverting scope crosswires are not conected to adjustable eypiece. They are fixed to the main tube of the scope. Historic sextants had typically crosswires conected to the eypiece stacionary (it means, crosswires are always in focus, because the wires moves with eypiece every time we change focus).

Maybe you or other NavList members know: is there any other sextant model (except SNO-T), that has these wires fixed to the main tube (not to the eypiece tube)?

Modris Fersters