eyepiece brand??

[raymo]

I recently bought a BST 8mm " flat 60 degree" eyepiece which I haven't
had the chance to try out yet. It is painted gloss black all over.
Two questions; the viewing end of the eyepiece screws in and out
through 90 degrees. What is the purpose of this. Maybe it will become obvious when I eventually get to use it.
Secondly, does anyone know if this is a new product, or another brand rebadged, or simply a brand I'm not familiar with?
raymo

[dannat (Daniel)]

BST been around for a little while, same as astrotech paradigm
when you say viewing end do you mean the eyecup, it helps with glasses/no glasses -to get your eye in right spot?

[raymo]

Thanks Daniel, the whole eye lens end of the eyepiece turns, so that the
eye lens moves relative to the field lens, so I'm guessing that it is a
dioptre adjustment like you get on the viewfinder of a DSLR.
raymo

[raymo]

Whoops, made a mistake; it is just the eyecup that adjusts.
raymo