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Old May 30th 18, 06:50 PM posted to sci.astro.amateur
Chris.B[_3_]
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Default Questar 5 specifications released, mounting specs later?

On Wednesday, 30 May 2018 11:23:59 UTC+2, Quadibloc wrote:
On Tuesday, May 29, 2018 at 10:35:06 PM UTC-6, RichA wrote:

Just like Brandons, some cameras had screw-mount lenses. Back in the 1960's...


For 35 mm cameras, screw mount was the standard, and the various bayonet mounts
were developed later to allow additional features and be quicker to change lenses.

For telescopes, a plain tube is the standard.

John Savard


When I were a lad.. [ca 1960] my first [simple] eyepieces were solid brass, RAS threaded, in a hefty brass push-pull focusing mount [sic] for my first aerial ATM telescope. A 0.5 dioptre spectacle lens of 2 meters focus served as my objective. I [fleetingly] saw a huge and colourful Saturn thanks to a clothes drying post in the back garden through my 1/2" eyepiece. There were very few, British, astronomical equipment dealers at that time. It was another few years until a school friend allowed me to look through his cast-iron, altazimuth mounted 6" Newtonian reflector. Talk about luxury! The lunar image was spectacular!