Quote:
Originally Posted by TrevorW
HI Stefan
Great work on the scope, can I ask where did you get your glass from and how much did the primary and secondary mirrors cost - thanks  |
Thanks Trevor,
For the prototype primary I used a Pyrex blank that I thinned down and for SN001 I used Borofloat from Schott. Both secondaries were Borofloat.
I'm not very happy with Borofloat, so I've gone back to Pyrex for primaries and borosilicate glass for the secondaries.
I have to slice the old school blanks that I acquire from various sources as they tend to be over 40mm thick.