[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [ATM] Harmer-Wynne Design



Jens Moser wrote:
 > 350mm- 400mm Backfocus would be fine. Also a f/4-Primary.
 >
 > Best,
 > Jens
 >

Using final f/8, secondary diameter 190 mm, primary f/4,
and BFL 375 mm as goals, I came up with:

	http://users.rcn.com/rflrs/Harmer-Wynne1-05x.len

Of the goals, it is worst at meeting the f/4 primary goal,
ending up at f/3.83.  It seemed quite resilient to change.
Perhaps it could be brought closer if the field diameter
could be reduced from 90 mm.  I suspect, though, that the
field flatness would be a stronger constraint to remove.


-- 

Rick S.

http://users.rcn.com/rflrs


_______________________________________________
ATM mailing list http://www.atmlist.net/