Quote:
Originally Posted by bojan
I also included two files here, optic is optical path simulator (very general ray tracing program), very simple and easy to use and other one is html with optical formulas... All very useful stuff  |
Thanks bojan. If I dig out my old lecture notes on optics, I should be able to work it out myself anyway.
Quote:
Originally Posted by 74tuc
Hi Steve,
What you tried should work BUT!!!
The possible reason for the lack of success here is, by putting the Barlow before the diagonal, that the Barlow lens itself is further into the light cone than where it was designed to be and as a result the focuser travel (out) is not enough to focus - an extension tube to move the Barlow further out will help.
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Ah of course. Thanks
