Hi Alexander,
The scope is a 127mm ED APO refractor, and the collimation tool is 1 made by rodger from Bintel.
Its about 5" long, fits in the 1.25" barrel, has a large hole on the side with a mirror on a diagonal and a pin hole in the end you look thru. Light comes in thru the hole on the side, hits the mirror then goes down the ota tube.(see attached diagram).
Hope my pic helps.
John
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