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10 lis 2014 · A 6" f/8 is easily manageable and cools quickly, while a 10" will require more planning and cooldown time (unless used for low power deep-sky). (As note: a 31mm Nagler in a 6 inch F/8 with a 1.5 inch secondary will show more than 1 magnitude drop off in illumination at the edge of the field.)
For these scopes collimation is less critical and can be done much less frequently. Our step-by-step guide below describes a relatively easy way to re-collimate your Newtonian telescope with simple tools, by making small adjustments to the secondary mirror assembly and to the primary mirror cell.
Carol Sabo - Bresser 6" f/8 Newtonian reflector on a Celestron CG-4 German Equatorial Mount. Video 1 of 2. Demonstrated at the Superstition Mountain Astronomical League® meeting of 17-Aug-2018 ...
Here is what a classic 6 inch F8 Newtonian reflector telescope looks like. It is on an equatorial mount (although today many such scopes are on Dobsonian mounts). This view shows a close up of the finderscope and the focuser.
The Sky-Watcher StarQuest 130P Newtonian reflector is an easy-to-assemble ‘grab and go’ telescope that gives rewarding views.
11 maj 2015 · As a part of the process, I wish to present to the amateur telescope making community my 6” f/8 Newtonian used at f/16 that will seek to address every one of the Newtonian’s faults—a telescope that I call the Definitive Newtonian Reflector, or DNR.
26 kwi 2014 · As others have said, it's the f/5 that matters, so both scopes will be equally bright, but the 8" will be much heavier (harder for the rest of your family to use) and will give greater magnification - depends what you want to image really.
