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

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    Observing Jupiter with a spotting scope

    Thanks! Would that explain also why there is different colours than the CA I see in daylight with my scope (orange and blue vs magenta and yellow)? I didn't notice same colours with Saturn that evening allthough it was equally low, does it depend how bright the object is? Regards, Juhani
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    Observing Jupiter with a spotting scope

    Hi Joachim, So Kowa 833 (or at least some samples) have lateral CA at the image center? Is lateral CA dependent on the scope body or only the eyepiece? Why some samples of 883 seem to have it and others not (referring to Jan Meijerink's test images which clearly shows some samples have quite...
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    Observing Jupiter with a spotting scope

    I'm afraid it is from the scope. See here: ATX95 chromatic aberration etc. I have been in the impression that longitudinal chromatic aberration is not a sample dependent aberration and that Kowa 883 doesn't suffer from it, but for me it seems that this is not completely true. It's nothing new...
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    Observing Jupiter with a spotting scope

    There were 4 moons showing, even with 10x binocular. Because the planet was so bright I had to underexpose the picture so much that the dimmer moons are not visible in the picture. Your description sounds like Jupiter; it's showing on the right side of the moon at east-southeast direction...
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    Observing Jupiter with a spotting scope

    Yesterday evening I tried to observe Jupiter here in central part of Finland. Weather was clear but some air currents were deteriorating the seeing. Nevertheless I had maybe the best views of Jupiter so far using my Kowa Tsn-883 spotting scope with the 1.6x extender. Two dark bands were showing...
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