Make a Telescope
A low-cost Small Refracting Telescope
This telescope has some few custom made items and some off the shelf picked up plastic tube material used mostly by irrigation industries.
The telescope itself, that is, the optical tube assembly of the telescope is made of the above parts and one tube. And the stand of the telescope is made mostly of plastic tubing material.
|1||Achromatic lens||diameter 45 mm /
focal length 45 cm
|3||45 degree mirror||one|
|4||Eyepiece||focal length 25 mm||one|
|5||PVC tube for the telescope|| 50mm outer diameter /
35 cm long
|6||Reducer||50 to 40 mm||one|
|7||Cradle||for PVC tube (item no 1)||one|
|8||Threaded coupler||32 mm||two|
|9||Elbow (threaded)||to fit threaded coupler (item 4)||one|
|10||Elbow to Cradle coupler||one|
|11||End flange||for reducers (not essential)||one|
|12||Stand pipe||32mm outer diameter / 35 cm long||one|
|13||Wooden board||25 cm x 25 cm
(thickness about 2 cm)
The assembly of the telescope is rather very simple and can be easily carried
out from the pictures given below.
The parts 1 to 4 were purchased from Tejraj and Co in Mumbai, India and rest from local suppliers of irrigations material.
Point to be noted here is that that the end flange is
not absolutely essential. One can always drill hole in the wooden plank and
fix threaded coupler into it. What is important is the PVC tube for the
telescope. It's outer diameter should 50 mm and
the reducer should be 50-40 mm so that 45 degree mirror assembly can go
into it. The cradle should clamp the telescope tube.
For rest of the mount one can be flexible.