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Achromatic Refractor Telescope
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Assembled OTA
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I recently had first light with this bare-metal OTA on February 21, 2009. My autoguider came to focus at about two thirds travel, a bit further than I'd planned but not an issue at all. Stars came to a nice points in the PHD viewer. That'll work!
Collimation is....well, imperfect. I attribute some of my problems to the hastings pipe being less than perfectly round. The cross-section is actually a very slight oval with some excentricity that various about the circumference. Andy at HPO tells me that their piping, while very popular among ATMers, is not manufactured to be perfectly round because it's not necessary to perform perfectly well as irrigation pipe. Makes sense.
At some point in the future I may seek out a better tube for this scope. In the meantime it does it's job exceptionally.
The final appearance of this OTA will be black powder coating for the hasting tube and dew shield. The focuser adapter will be anodized red for a subtle color accent that matches those found on the astrograph. The lens cell will be anodized black.
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All projects on Shareaproject.com are user-submitted and should be used for reference information only. The projects are not intended to be complete "How-To" articles. Use the information contained in these projects at your own risk. Projects are not checked for completion, accuracy, or safety and therefore cannot be guaranteed in any way.
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