Bonjour Christian,
Yes, we had several test with different drills before make the definitive hole on the flat mirror, fortunately Toni Jové has a milling machine, now he can do a hole and with different diameter in almost to all inclinations. The commercial metallic coating it's usually very hard, I did a lot of work to remove the aluminized and quartz coating from Meade newtonian mirrors to improve their parabola.
Really I'm the first surprised, the old version Nikon 85 mm. f/1.8 it has an aspherical lens and it correcte very well the chromatic aberration and coma, althought you need to a compomise focus situation if you want the most possible Orders because remains a bit residual aberration. However with a tungstene 3500K I think few sometimes it's possible one range from 3835 to 9390 Angs., ( Orders 57 to 24 ), in an ideal situation..The other hand, I unknow why Tim doesn't get this results, he has the same Nikon than me, is possible he has a bit collimation error or CCD inclination, really I don't know about it.
R. Walker, P.Berardi and M.Dubs helped me in infrared lines, in these Order hvae some emission lines the work it's a good identification of them, those are actually results. It's a job to do.
Blaze function correction...
Order #24 : RMS = .4100 - Nb. lines = 6 Order : 24 (Lambda1, Lambda2) = (8980, 9393)
Order #25 : RMS = .4694 - Nb. lines = 7 Order : 25 (Lambda1, Lambda2) = (8628, 9009)
Order #26 : RMS = .0938 - Nb. lines = 9 Order : 26 (Lambda1, Lambda2) = (8304, 8656)
Order #27 : RMS = .0100 - Nb. lines = 7 Order : 27 (Lambda1, Lambda2) = (8002, 8329)
Thanks, I will use this 15%
I have some questions too, Christian,
I use ISIS versions 5.9.0 and 5.9.2 but ISIS newer versions broken when I try to reduce my data. What am I doing wrong ?
I don't know why, ISIS don't save Orders 25 and 24 but they both are in files _*_ **_full.fit.
Of course, I always getting graphics of stars but always far of the balze zone, and the flat**_dat files are very asymetrical, if I try centered to blaze zone ISIS has breaking. I don't undestand why.
I left here for you and for all,
https://drive.google.com/file/d/1xROqUT ... sp=sharing , two VEGA observations and a CALIB folder it's day 20190809 is better than day 20190816.
Cordialement, Joan.