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

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  1. B

    Moon through Kowa Prominar 883 + APM 12.5mm + 1.6x extender

    Juhani, The albedo of a full Moon is 0.12. But the albedo of a half Moon is only 0.02. The Earth is much higher. So generally photos of the full Moon need approx. the same exposure for a photo as the Earth allowing for losses depending on Earth location. But a half Moon is dimmer. It seems...
  2. B

    Moon through Kowa Prominar 883 + APM 12.5mm + 1.6x extender

    Juhani, That is good performance shown on the video. I watched it on the T.V. Only slight turbulence. The Seeing is quite good. Does the focus change slightly as the eyepiece zooms? It was minus 20C and windy yesterday in Helsinki, so that would affect the Seeing. It is difficult to...
  3. B

    Moon through Kowa Prominar 883 + APM 12.5mm + 1.6x extender

    The ETs live in the Moon's subway system. Regards, B.
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