Hello to all,
After a lot of time I returned here, I apologize to you for that.
Sure you know the Tim Lester echelle spectrograph, you can see it here.
http://www.spectro-aras.com/forum/viewt ... 4a287fbbdc
It is a really nice and elegant and very effective design solution, without optical fiber, it pleased me and I made one with very good results.
Then I told Tim the possibility to make some of them for possible observers that can't afford commercial echelles. Tim answered me " OK, but with the most possible cheaper price ".
I have made a little series of these echelle which one cost € 3000 without the optical parts ones which cost around € 1000. Obviously they have Relco and tungsten lights.
I show here some photos about this echelle, the NOU_T. NOU is NEW or NINE or NUT in Catalan language and the T is for Tim.
If you want more information, please let me know. I will try to show more results in the future here.
Best regards, J. Guarro.