Image of the day

Captured by
Erwin Forbragd

Horsehead Nebula

My Account

New to Astromart?

Register an account...

Need Help?

Collimation Devices

Started by raolson, 09/07/2005 04:44PM
Posted 09/07/2005 04:44PM Opening Post
Need some opinions. I have a 12" Antares Dob and I collimate it per the information in 'The Backyard Astonomer's Guide'. Based on my night time observations when I use my Televues I get some slight coma at the edges but all other optics tests suggest I am accurately collimated. A friend of mine used his laser collimator on my scope and the beam did not even show up on the collimators target and was about 1.5 inches from the mirrors center spot. We checked the calibration of the collimator and it was accurate. Have my eyes been decieving me? or are the laser collimators just a marketing gimick?
Posted 09/07/2005 04:51PM #1
not sure but my first guess is that you secondary is out of line. Maybe not but I would guess that from here.

Real men play Golf
Posted 09/07/2005 06:46PM #2
Are there any collimation devices on the market that users prefer over another? That has been one point that has puzzled me the last while. I too am looking to purchase a collimation device, but with all the choices on the laser versions, it leaves me confused. I will be using one on a F6 Dob.

Keith