Re: [APML] Coma corrector needed ?

[Chris1011@aol.com]

In a message dated 2/15/2002 7:54:05 AM Pacific Standard Time, wrmattil@ix.netcom.com writes:


> Having ordered a new Optical Tube Assembly to augment my existing 10"
> f/6 Newtonian I have decided upon either a 12.5" or 10" f/4. Not ever
> having owned a "faster" scope I am curious if I will need a coma
> corrector for this.


My associate, Wally Piorkowski has both a 10" F3.9 and 16" F4. Even with an ST10 chip size, both scopes show horrendous coma over the outer 50% of the format. I would think that 35mm format would be even worse. I think you will want a coma corrector of some kind.

Roland Christen