I plan on putting together a monocentric eyepiece... *someday* (a few other LONG-overdue projects will take first priority, over the next few months). Perhaps my timing will coincide with the "return" of Jupiter & Saturn.
Steinheil monocentric triplets are available from Edmund in a few focal lengths. They carry Hastings triplets, too.
Once I give it a try, I'll check back and relay my impressions.
The greatest advantage might be in the category of surface scatter. I recall one particular report in which an experienced stargazer, trying a monocentric for the first time, noted less scatter in it than in another "standard" eyepiece.
--I'll try and find the article. It may have been Jay Freeman.
I'll happily deal with a 30-degree apparent field, if the monocentric yields a discernible advantage in image fidelity.
Best wishes.
-Dan
Steinheil monocentric triplets are available from Edmund in a few focal lengths. They carry Hastings triplets, too.
Once I give it a try, I'll check back and relay my impressions.
The greatest advantage might be in the category of surface scatter. I recall one particular report in which an experienced stargazer, trying a monocentric for the first time, noted less scatter in it than in another "standard" eyepiece.
--I'll try and find the article. It may have been Jay Freeman.
I'll happily deal with a 30-degree apparent field, if the monocentric yields a discernible advantage in image fidelity.
Best wishes.
-Dan