Quote:Yes we have heard of the metre swedish scope usual, but what we are trying to do is introduce new ideas into ATM, and our experience is that new ideas are rejected on a knee jerk regularity, Why?, I find this fascinating this resistance to change.
20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .
Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schiefspiegler,60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4" f/12, 4.5" f/16 & 6" f/12 Schupmann Medial refractors, 4" Celestar, 19 Stellafane awards 9 in optics Engineering = Taking what you have and making what you need.
Quote:. In a similar vein, the Schiefspeigler design has also not been commercialised - I made a 4 1/4 inch Schief back in 1976, and made much use of it, showing dozens of schoolchildren at my son's school the wonders of the night sky. Even a party of nuns! It was 'tea and stars' and was a resounding success - and provided free. All under the wonderful South African skies.
Quote:David is right of course, the retro is a scope for those who like forbidden fruit,it is a challenge to build by the amateur, perhaps his scope should be aired on a different forum. The Idea of these postings is to introduce a new and exciting system.
Quote:I have been researching simple telescopes for some time, one being the dreaded Hypo, but we have said enough on that already. This scope is very basic, it uses a singlex OG, and another singlex reduction lens.