Jagho

Jim or @Paul Gerlach, could you show the link I can download this plugin from, please? Edit: OK. I've found it.

Lukas, maybe you could offer these accessories in your Astrojolo shop.

Thanks Ken. I've got the same result, so if Simspec V4.3 says the truth for 600 l/mm and less the telescope could be f/6.3, even with 25 x 25mm grating, I guess. It is needed to increase collimator diameter, of course.

Paul, what is the "Collimator/Camera -Total angle" ? -> 56° ?

You are right. He was doing it at very bright stars and wanted to achieve high resolution (dispersion less than 1A/pix as I know) so lose of light was acceptable. I'm building lowspec for a completely different purpose - using grating 150 l/mm, 80mm camera lens and 26um camera pixel (dispersion 20A/pixel, R~130) - I want to make spectra of 15-17mag supernovae in long time exposures (10" SCT).

Thank you Paul, nothing happened. Maybe I will build Lowspec 3 someday and I already have one part As far as I know there are 3 people in Poland who are building Lowspec. @drjolo and me are still building or testing, but one of our colleagues (Bajastro) already has reached very good results at high resolution (Almach, Aldebaran, Capella stars): https://astropolis.pl/topic/69283-widma-gwiazd-ze-spektrografu-low-spec-2/

Hi Paul (and other astro friends ). I thought that It'll be good to print "16_ovio_guide_platform" also, because It has a bit larger (longer) opening. Unfortunately, this was not a good idea. The new "16_ovio_guide_platform" can't be fitted to LowSpec2, right?