Refractor Lens Assembly Collimation

Does anyone know of a service that will align the lenses for a refractor within the lens cell? I am sure over the life of the scope, the lens assembly has been taken apart.

Thanks,

Tim Hornbeck

Tim
Is the refractor objective a doublet or a triplet? Are you able to identify set screws that change the position of one lens element relative to another? Is there coma present when you observe through the objective?
One person that might be of help is Art at Texas Nautical Repair. They are now known as Land, Sea, and Sky and can be found with a search engine.
I have experience with adjusting the position of the posterior element of a triplet in one objective only. In that instance it was done by observing a star of magnitude +1 at high power through a green filter and making very minute changes on three set screws in a fashion that would move the posterior element and eliminate coma. It took a while to get the hang of it but like all collimation is very satisfying when you achieve a nice image. I found that a night of steady seeing was helpful in doing this adjustment--sometimes I was frustrated by the time I was spending doing this adjustment on a rare night of excellent seeing when I would have rather been observing planets at high magnification.
Adjusting the position of the entire lens cell to align the optical axis of the objective with the optical axis of the tube is easier. A Cheshire eyepiece in sunlight with the objective covered allows one to see "dots" of reflected light at each interface in the objective. The lens mounting screws are then adjusted in push/pull fashion to line up the dots.