astro1965
07-10-2017, 06:00 PM
Hi all,just after one of these old style correct image, straight through
prisms,that no longer seem to be around.I have a 45 degree one,but would like to try straight thru terrestrial observing.These were the circular thick
prisms(usually black in colour).cheers,Nick.
prisms,that no longer seem to be around.I have a 45 degree one,but would like to try straight thru terrestrial observing.These were the circular thick
prisms(usually black in colour).cheers,Nick.