coma corrector

suma126 (Shane) · #1 01-04-2009, 01:16 PM

HI were can i buy a cheap 2" INCH coma corrector for a newtiona telescope.

MarkN · #2 01-04-2009, 07:01 PM

G'day Shane,

If you're thinking of the Baader unit you should know that they require adapters for different applications. The Televue Paracorr is the goods but costs. Try for a used one if you can't manage a newie.

In my opinion, they are worth every cent particularly for focal ratios of 4.5 and faster. Definite improvements even at F5.

Mark.

Gama · #3 01-04-2009, 08:20 PM

Makes no difference where you use the Baader MPCC, its alwas 55mm from last optical surface.
Even still, if out by a bit, viewing, its still makes points of light to stars on the edge. I had it on my 22" f4.5 with great results.
Both good choices, but the Parracor adds to the f ratio, wheras the Baader is at x1.

Theo

Archy (George) · #4 14-04-2009, 11:26 PM

Quote:

Originally Posted by suma126

HI were can i buy a cheap 2" INCH coma corrector for a newtiona telescope.

Andrews