DRT Posted January 18, 2017 Share Posted January 18, 2017 (edited) This post is long overdue as the error I made happened about a year ago and the Pronto has sat doing nothing ever since. I bought this scope second hand about two to three years ago. After a while I noticed that there was some fungus stuck to the inside face of the objective. Not wanting to mess around with the sealed collimation screws I released the retaining ring from the front of the lens cell and carefully removed the two lens elements. This is where things started to go wrong. Firstly, I very carefully washed the lens elements in warm soapy water to remove the fungus. I also managed to remove most of the blackening around the edges of the lenses Then I tried to re-assemble the lens cell but had forgotten to mark the edge of the two elements to ensure I put them back in the same alignment. The washing had removed any trace of helpful marks that could have been used to work this out so there is a 359 out of 360 degree chance that they are now in a different place to where they were when Tele Vue put the scope together I have checked the collimation of the re-assembled scope and that is fine but the views just don't seem to be as sharp as they were previously and CA is definitely more apparent than it once was. This could be either the lack of blackened edges or the misalignment of the objective elements - or possibly both I thought about calling TV to see if I can send it to them to fix but that's going to cost £100+ just for the postage and would no doubt have a repair bill to pay. So I have decided to post this question in the hope that the collective knowledge of SGL can perhaps advise me on how to go about sorting the alignment of the lens elements. Any suggestions? Edited January 18, 2017 by DRT Link to comment Share on other sites More sharing options...
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