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Celestron / Vixen C100 User manual or collimation instructions

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#1 cambutton

cambutton

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Posted 06 April 2021 - 04:03 PM

Hello Cloudy Nights.

 

I ordered a cheshire eyepiece to check the collimation on my refractor.

 

I have no idea how to adjust the objective.

 

Would someone post a link to the user manual or good collimation instructions for this awesome refractor from the 80s?

 

Thank you for your help.

 

Cam

 

 


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#2 mfoose

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Posted 06 April 2021 - 04:59 PM

Hello Cloudy Nights.

 

I ordered a cheshire eyepiece to check the collimation on my refractor.

 

I have no idea how to adjust the objective.

 

Would someone post a link to the user manual or good collimation instructions for this awesome refractor from the 80s?

 

Thank you for your help.

 

Cam

Hey Cam,

 

I have one of these Vixen made 102mm f/9.8 achros. Some of these models have a collimatable front lens cell which makes collimation straight forward. Mine is one that does not have the collimatable lens cell. I have found two ways to collimate mine.

 

First is the 3 screws that hold the focuser in. If you loosen all of them the focuser has a little wiggle to it. While the screws are just slightly loose I grab the focuser and manually tilt it until I am collimated. The other way is to loosen the bolts in the focuser that apply pressure to the teflon pads and the focuser drawtube. I have found that tightening them back one at a time shifts collimation slightly. If you use trial and error you can slightly adjust the alignment, but more as a way of fine tuning. These ways are not ideal, but they do the job.

 

I do use different collimation tools though: a glatter laser collimator and a translucent collimation mask.

 

If you have the lens cell with collimation bolts then just use those. 

 

Below is a picture of my lens in its cell. No collimation bolts. The second picture is the collimation mask with glatter laser in operation.

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#3 cambutton

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Posted 06 April 2021 - 07:11 PM

Thanks mfoose.

 

I have the adjustment screws on the cell.

 

I didn't think about the focuser screws, glad that you mentioned them.

 

That is a high speed mask. I may try something like translucent paper with a laser for the focuser.

 

Cam




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