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

Re: [ATM] coma

Depends upon what you mean by a focal reducer.  The Parracor does a very
mild change of focal length as it does its job.
If you don't take coma reduction into effect on a focal reducer, you still
get the same amount of coma as if the scope had the shorter FL in the
primary.  Field of view is field of view and the coma gets worse as the
field widens.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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