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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. B

    Out with ED spotting scope, in with 5" Maksutov telescope

    Because the focal length of the eyepiece will not be exactly 9mm and the focal length of the scope not exactly 1650mm, I would round the magnification to 180x. This is probably the sweet spot for best terrestrial conditions. It is possible that on a good night for high elevation astro objects...
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    Out with ED spotting scope, in with 5" Maksutov telescope

    Hi DunninLA, Good to read your report. You seem to have a good example of the 127mm Maksutov. I am not surprised at all that you can use 160x on a sunny morning with good Seeing. Is the magnification actually nearer 180x if you are using a 45 degree prism? This is with the large central...
  3. B

    Out with ED spotting scope, in with 5" Maksutov telescope

    DunninLA. Enjoy. Regards, B.
  4. B

    Out with ED spotting scope, in with 5" Maksutov telescope

    The view of a crow on the chimney pot 124 metres away looking through the Skywatcher 90mm Maksutov and using the Televue 45 degree prism at 125 times was bloody marvellous. But I had to wait for a 20 degree elevation bright sun almost behind me to get this view and fine detail. This is looking...
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    Out with ED spotting scope, in with 5" Maksutov telescope

    I also suggested a 120mm or at a minimum a 100mm good quality refractor for this application of long distance viewing. Indeed, a 6 inch long focus observatory refractor would do well. The 150mm Skywatcher ED refractor may also be good. But the choice was a 5 inch Maksutov, and it has proved to...
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    Out with ED spotting scope, in with 5" Maksutov telescope

    I have the Televue Chester NY 45 degree Image Erecting Prism AM1-0011 Televue Visionary here in my hand. It is uncoated, but it is the one I use. 1.25 inch barrel. I trust Televue. But if I use a scope I typically go to 100x or more. I probably have a 2 inch diagonal and prism also. Not...
  7. B

    Out with ED spotting scope, in with 5" Maksutov telescope

    Hi DunninLA. I have used Maksutovs terrestrially for well over 40 years. Particularly the Custom 150mm f/10 at 95x. From one to five miles typically. I have written about these scopes for years also. Points to watch. My 127mm Skywatcher optics are not great and have some temperature problems...
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