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Old 29-04-2012, 01:33 PM
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The Mekon (John Briggs)
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Join Date: Jul 2007
Location: Bowral NSW
Posts: 826
Modern refractors are too short!

Tried to do some photography last night using an eyepiece projector. Found I had to have the camera adaptor, projector extension + 35mm extension just to reach focus. The whole affair was 230mm long! These new refractors are just made too short in the tube. The astro-tech 106 that I am using has 80mm of focus, and will not reach focus with a 1 1/4' prism. It is about 15mm too short. Last night it was about the same short of working without the 35mm extension. Why cannot the builders of these scopes give us a decent length tube? An extra 20mm on the tube would not make the case any bigger, and make using the scope so much easier.
I am sure Astro-tech are not the only makers guilty of this, but they must be one of the worst offenders looking at some of their other scopes which hardly have much main tube at all.
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