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.
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.