British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community

9.5 inch reflecting telescope 1968 update


Expand image

About this observation
Peter Anderson
Time of observation
13/10/2018 - 15:00
9.5 inch reflecting telescope 1968 update
Observing location
Brisbane, Australia
Standard camera
Not relevant

Image taken 1968.

In 1968 the telescope was updated lining the tube with cork sheeting, adding an extension to the tube in the hope of reducing thermals near the eyepiece end, and mounting it on a wheeled cart to facilitate transport outside for observing sessions. (The tube is affixed to the handle during moving.)

This is the configuration in which it remains today.

The mirror (in late 1961), was one of the first to be aluminised AND OVERCOATED here in Australia .  The overcoating today is probably at least 80 percent as good as it was in 1961.  I had my 16" Cave Observatory telescope re-aluminised and overcoated within months of starting observing in 1980 because it was deteriorating badly. (It had not been overcoated).  When I sold it in August 2016, the overcoating meant that the mirror was still in very good condition, with just careful washing every couple of years. I can thoroughly recommend overcoating!

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.