Quote:
Originally Posted by Satchmo
Rod
These large mirror blanks are made with low cost technology so the normal commercial mirror blank prices wouldn't apply . The plate glass blanks have very thin face sheets with an array of rectangular stalks in between that give the blanks their 'thickness'. I haven't seen this kind of design ( where the internal ribs are just stalks ) . I guess it remains to be seen how they perform both practically and in the market place. It will be interesting to see some sort of credible independent optical testing of the large mirrors. Testing such a mirror would be a major feat in itself.
Have a look at this link and down the bottom for photos of the blanks, and the pricing structure.
http://www.normandfullumtelescope.com/mirror_en.html
Mark |
Thanks for that info Mark. Very interesting. Some of those beautiful hand crafted scopes look incredible (if somewhat impractical for transportation etc).
Just out of interest, what is the biggest mirror you have figured, and what is the biggest you would be prepared to try??!! (one can always dream of that future project....an f/3 40" mirror would suit me!!!)
