Image of the day

Captured by
Chanan Greenberg

M20 M21 and M8

My Account

New to Astromart?

Register an account...

Need Help?

Paracorr Questions:

Started by Gary Palmer, 06/08/2002 08:42PM
Posted 06/08/2002 08:42PM Opening Post
Would a Paracorr used in front of a non-barlowed TV Binoviewer still work to correct for coma and still increase magnification by 1.15? Would the paracorr used this way change the focal position by very much? Thank for the info. Gary Palmer
Posted 06/09/2002 02:18AM #1
Gary,

I believe the Paracorr will increase the focal length by 15% regardless of what it's placed in front of.

The use of a BinoVue without the barlow will require several inches (five as I recall) of in-travel to reach focus. Depending on what type of telescope you have, you may not be able to reach focus without the barlow.

Pat Rochford