I did try that as well as used other EPs but nothing changed.

Dan

"Brian Tung" wrote in message
...
Dan wrote:
The oval patterns I mention are also present at the center of field but
not
as pronounced. The problem completely disappears at moderate to high
power.

Hunh. Interesting. Just for a lark, try observing the problem at low
power, and then rotating the eyepiece. See if the pattern rotates with
the eyepiece, or stays in place.

--
Brian Tung
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