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w665gc

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About w665gc

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  1. You're out with two APO refractors 65/420 and 70/478. Which one you would use DSO imaging and which of them left for visual observing meanwhile you're shooting? Why?
  2. https://www.astroshop.eu/telescopes/tecnosky-apochromatic-refractor-ap-70-478-quadruplet-flat-field-ota/p,57327 How to know this? I have read that with 65/420 scopes you cannot use 2" diagonals because there isn't enough backfocus.
  3. I sent mail to them and asked about it. They said it is Quadruplet (4 element).
  4. Is this really quadruplet? Really cheap scope, is it OK?
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