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BadgerD

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About BadgerD

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    Vacuum
  1. Hi all. I'm writing an article about swapping eyepieces between telescopes. Of course I need to cover the topic of barrel lengths. I thought it would be good to show a picture of a .965, a 1.25 and a 2 inch eyepiece next to each other. Unfortunately, I don't own a .965. So, if someone had a snapshot of that or could easily take one, I would be much obliged if you wouldn't mind sharing. Also, I have a technical question. I know (in large part from reading this forum!) that for smaller focal ratio telescopes, higher quality eyepieces may be necessary. But is this more true with short focal length eyepieces or long focal length eyepieces? Or does that matter? Thanks in advance.
  2. So, a faster focal ratio doesn't provide a brighter image visually, but it does provide a brighter photographic image at the same shutter speed? Is this right? Why not a brighter image visually?
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