Quote:
Originally Posted by spaceboy0
well where do I find this magical telenegative lens? I already have a 2 x Barlow that I screw with the eyepiece..
I can't get a more low profile focuser; heck as it is now, the focusing knobs are almost flush with the tube!
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Then you move the mirror forward and add some weight to the back to put the center of gravity back where it belongs.
Also for Saturn you'll need a tracking platform when using film. Back in my film days I needed at least f/50 for fine grain film on Saturn, that took a 4 second exposure using the hat trick to avoid mirror flop vibration. In 4 seconds the earth's rotation will move saturn more than its own diameter so it will be a fuzzy streak. You'll need a tracking platform under it. They can be bought or made depending on your circumstances. Google the term <"tracking platform" telescope> without the brackets but with the quotes and you'll turn up info on building one as well as commercial units. Try "Poncet platform" as well Check the ads in the back of Astronomy and Sky and Telescope magazines as well. Lots of them out there in all price ranges. Simple single axis ones are all that's needed for planetary film photography.
Rick