Does anybody have some good ideas for how to make a focuser for small, very, very, short, focal length spotting scopes? I'd be particularly interested in how to make a helical focuser where you could place a diagonal and eyepiece in it and then screw it in or our to adjust the distance from the objective lense. When I try to re-use a focuser from an old department store scope, the focuser tube is almost longer than the overall scope focal length.
The little objectives that I've been playing with are in this category:
http://www.surplusshed.com/pages/item/l1436.html
http://www.surplusshed.com/pages/item/l3610.html
http://www.surplusshed.com/pages/item/l3035.html
http://www.surplusshed.com/pages/item/b1013.html
The little objectives that I've been playing with are in this category:
http://www.surplusshed.com/pages/item/l1436.html
http://www.surplusshed.com/pages/item/l3610.html
http://www.surplusshed.com/pages/item/l3035.html
http://www.surplusshed.com/pages/item/b1013.html
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I have several telescopes, but none are semi-APO, APO, or in anyway valuable.
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