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  1. W

    Telescope light transmission figures

    Hi Gijs. Yes I noticed that - thanks for all your work! I'm just curious as to why this may be.
  2. W

    Telescope light transmission figures

    Good point on the glass though, focal length of spotters is way lower than there equivalent aperture astro refractors in general.
  3. W

    Telescope light transmission figures

    I know what you mean, transmission is less of a thing with astro, most makes don't even quote it, want more light - get a bigger scope! I'd suppose in theory straight scopes would have a slightly higher transmission than an angled one as they don't need the additional prism to turn the light up...
  4. W

    Telescope light transmission figures

    I've noticed again that even the latest and greatest scopes have much less transmission than binoculars of a similar quality. As a case in point the new ATC scope from Swarovski has a transmission figure around the 85% range according to the recent review on house of outdoor where as their...
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