B Starr wrote in message ...
(Richard) wrote in
om:

I have not had the opportunity to use either of these products, and
can't
wait long enough until I do to choose. So if my goal is detail on
planets,
which do I use?
Astro-Physics Super Planetary Eyepieces or the TMB Super Monocentric
eypieces?
I've got a decent compliment of orthos, Brandons, Taks, have used
Pentax orthos, etc, etc, and really
want to see if either of these offer an improvement. Maybe both will.
Thanks.

Check the Aug issue of Sky and Telescope for a review of the TMB Super
Monocentrics.

The reviewer noted astigmatism in the TMB's. Strange for such a narrow
field of view. Is this a problem with other monocentrics?

Not really, AFAIK, for a 30deg AFOV. The designer says it only has
field curvature (which is bad enough in a 30deg AFOV EP!). Apparently
the issue is about quality control, of four randomly selected EPs
three had noticeable astigmatism (!!!!) and the fourth (the shortest
one) was little used.

Andrea T.