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The Telescope |
| I would have
liked to use a 6-inch, but I remembered giving my father-in-law a Coulter CT-100 rich
field reflector as a Christmas present several years back.
The scope was ideal! It consists of two 5-inch diameter cylinders about
three inches long. One of these holds the 4-1/4 inch mirror mount and
the other holds the diagonal and eyepiece. During operation the two
cylinders are held in place by a small aluminum extrusion. All I needed
to do as to convince him to let me "borrow" it for an unspecified
length of time. I might even let him borrow it back from
time-to-time.
You can't buy a Coulter CT-100 any more, but check out Sky and Telescope, Dec 2003 on building something very similar. |
| The scope is held to the mount with a 1/4 in screw. Each optical end is held to the separator bar with threaded knobs. The critical alignment is to have the optical axis of the scope aligned with the axis of the elevation box. The elevation box is sized to do this and it is easy to keep the mirror end of the scope aligned with the sides of the elevation box. |
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