Quote:
Originally Posted by David Fitz-Henr
Thanks Allan.
It is a conical mirror that I purchased from R.F. Royce to replace the original conical mirror that developed a crack and ruined the figure. It is f/5.05 natively, but I am using a 3" Paracorr that changes it to an effective f/5.8. I have pictures of its construction here: https://pbase.com/david_fitz_henry/317_5mm_astrograph |
Thanks David,
that's an impressive setup -
no wonder your pictures are so good.
f5.8 is giving you a nice image scale to zoom in on galaxies.
Did you measure the FWHM for the pic in this thread?
cheers
Allan