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Old 02-09-2005, 10:39 AM
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avandonk
avandonk

avandonk is offline
 
Join Date: Aug 2005
Location: Melbourne
Posts: 4,786
Novel ? Guidescope design.

Hi all,here are a few pictures of a guidescope I built thet holds the webcam magnetically.This is to allow a simple way to adjust the lateral position of the webcam to find a suitable guidestar.We all know how annoying this can be for dim objects in not so bright star fields.

It also fits onto any telescope with 1 1/4" fitting.This 1 1/4" adapter has a 130mm lens inside to act as a focal reducer,giving a wider choice of stars.The metal discs are out of old floppy drives.The magnets from Jaycar.
The PVC tube guidescope has a relatively cheap achromat 340mm 103mm dia.
The on screen picture (Guidedog)of the jewel box gives some idea of the system ability to see even dim stars.Even at a focal length of only 340mm it is accurate enough to guide the Tal200k.
The best thing about it is there is no drift due to flexure as none of the mounting hardware is disturbed.
Attached Thumbnails
Click for full-size image (Phillips ToUcam_.jpg)
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Click for full-size image (Picture 117s.jpg)
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Click for full-size image (Picture 120s.jpg)
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Click for full-size image (Picture 123s.jpg)
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Click for full-size image (Picture 124s.jpg)
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