Concenter collimation tool

[Neil H]

Hi all after reading that a Concenter tool is better than a Cheshire for collimation  I want to get one but do I get the 1.25 to match the size of eyepieces I am using or go for the 2 inch to match the focuser ? 

[Jiggy 67]

A 2 inch otherwise you would need some sort of adapter, it’s the focuser that you’re aligning the secondary with

Edited August 30, 2021 by Jiggy 67

[Jiggy 67]

Thinking about it, Either would be ok as you must already be using a 1.25 adapter in your focuser to take 1.25 ep’s

[markse68]

be careful if you have presbyopia- i bought the regular 2” one and can’t get the rings in focus so it’s pretty useless. I use my asi120 with its wide angle lens and “mire de collimation” free app to align. There’s a longer version of the concentre though which should make it easier 

Mark

 

[Neil H]

Hi guys I do use a self centering eyepiece adapter in the 2 inch focuser both the 2 inch and 1.25 are the same price , just wonder if one is better 

[markse68]

Sorry for confusing you Neil- in a nutshell if you need reading glasses you may not be able to focus on the regular concentre rings (I can’t) and should look at the longer version- which looks like only available in 2”- called Visus

Mark

Edited August 31, 2021 by markse68