More troublesome is the off axis ghost images of nearby bright stars which sweep through the field diagonally in the reverse direction of the sweep.
Not a dealbreaker in itself but plenty annoying, especially given the cost of these.
Just poor design...strange nobody else mentioned this.
Hi Mr. Bill... I certainly WOULD have mentioned it - but I'm not seeing it!
(Same setup w/ Docter eyepieces).
Might this be isolated to your sample, or to a limited number of examples?
I HAVE, however, noticed the "finernail" effect from time to time. It seems to be related to eye placement. If I stay right on axis I've never noticed it.
Only seen it a few times when I'm moving my eye around the eyepiece and there is a fairly bright object being observed or right at the edge of the field.