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Comparing Collimators

Reflector Collimation
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#1 StarDancerFL

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Posted 04 December 2021 - 06:50 PM

I want to replace my original Zhumell collimator because I am frustrated with it moving around inside the focuser of my Z12.

 

Any opinions regarding the Farpoint 1.25/2" Laser Collimator vs the Hotech 2" Laser Collimator? 

 Also, can either of these collimators be used on an SCT  (CPC 9.25 HD) ?   I have never collimated an SCT yet, so I don't know if I need a special or different tool.


Edited by StarDancerFL, 04 December 2021 - 06:51 PM.


#2 TelescopeGreg

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Posted 04 December 2021 - 06:56 PM

I have the Hotech.  Worked very well, though the advertised "perfect centering" function isn't foolproof. 


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#3 Vic Menard

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Posted 04 December 2021 - 09:16 PM

I want to replace my original Zhumell collimator because I am frustrated with it moving around inside the focuser of my Z12.

Have you considered this: https://www.eyepiece...r_p/6404000.htm

 

...Any opinions regarding the Farpoint 1.25/2" Laser Collimator vs the Hotech 2" Laser Collimator? 

 Also, can either of these collimators be used on an SCT  (CPC 9.25 HD) ?   I have never collimated an SCT yet, so I don't know if I need a special or different tool.

The FarPoint 1.25/2-inch laser will work (with your Z12) without having to use your current 2- to 1.25-inch adapter. Or you might consider the 1.25-inch FarPoint with a Parallizer (if you use a variety of 1.25-inch eyepieces). Generally speaking, lasers (and most other Newtonian collimating tools) don't work well with SCTs, while star alignment will get the job done...



#4 StarDancerFL

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Posted 04 December 2021 - 10:21 PM

Have you considered this: https://www.eyepiece...r_p/6404000.htm

 

The FarPoint 1.25/2-inch laser will work (with your Z12) without having to use your current 2- to 1.25-inch adapter. Or you might consider the 1.25-inch FarPoint with a Parallizer (if you use a variety of 1.25-inch eyepieces). Generally speaking, lasers (and most other Newtonian collimating tools) don't work well with SCTs, while star alignment will get the job done...

I was trying to get away from using the 1.25" adapter to hold the collimator. However, I hadn't heard about the Parallizer.



#5 merill

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Posted 04 December 2021 - 10:34 PM

I want to replace my original Zhumell collimator because I am frustrated with it moving around inside the focuser of my Z12.

 

Any opinions regarding the Farpoint 1.25/2" Laser Collimator vs the Hotech 2" Laser Collimator? 

 Also, can either of these collimators be used on an SCT  (CPC 9.25 HD) ?   I have never collimated an SCT yet, so I don't know if I need a special or different tool.

If you already have a laser collimator keep it and use it to get you close, then get a auto collimator and/or cheshire they are beyond the accuracy of any laser hands down..


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#6 SteveG

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Posted 05 December 2021 - 01:53 PM

The Farpoint kit - which includes their 1.25/2" laser and the calibrated Cheshire, is fantastic for collimating your dob. The laser fits like OJ's glove, very snug. The Cheshire allows for perfect primary alignment. You have to use their triangle center spot to use the Cheshire. Highly Recommended.

 

Do not get the Hotech. Centering in the eyepiece holder is not the objective - the tool needs to be parallel.

 

The Glatter Parallizer is the tool to have if you want to stay with 1.25".




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