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  1. janvangastel

    Newtonian scopes

    I have made lots of Newtonian mirrors and teach mirror making classes. You'll learn with practice. Making a good mirror seems difficult in the beginning, but is not too difficult once you know how to do it.
  2. janvangastel

    Newtonian scopes

    These images confirm my former message. Take the car sign example for instance.Images taken with a camera behind my 80 mm Swarovski - so less then half the aperture - over the same distances, are not less good, maybe even better. Attached is a photograph taken at a distance of 2000 meters, with...
  3. janvangastel

    Newtonian scopes

    I think a Cassegrain-type telescope would be easier to use for birding then a Newtonian, because the eyepiece is at the back of the telescope. I have been trying with a C8 (8"SCT) and was not too pleased with it. The images were soft (possibly caused by the large obstruction) and a heavy and...
  4. janvangastel

    Newtonian scopes

    OK, in that case, I agree with you.
  5. janvangastel

    Newtonian scopes

    If you mean you could see less detail on planets, moon or other celestial objects, the optical quality of the 12 incher must have been bad. I make telescopes and mirrors for Newtonian telescopes and I am very sure that a good 12 inch telescope shows much more detail then a 4 inch refractor. The...
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