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

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    EF 300/f2.8 L IS USM II + 2x II + 2x III extenders

    I'm afraid that daylight won't help as you anyway have to find the sharpest point by manually turning the focusing wheel (remember that my combination has 1920 mm focal length when using 1.6x crop sensor) and you still need to magnify the backscreen view by 5x or 10x to see the precise focus...
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    EF 300/f2.8 L IS USM II + 2x II + 2x III extenders

    Here is another try a couple of nights ago with less stopped down aperture and lower ISO. ISO100, 1/160, f9. Quite low temperature (about -15 C degree) so it took some time for the objective to cool down when brought outside, before that, image quality was terrible. It's very difficult to...
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    EF 300/f2.8 L IS USM II + 2x II + 2x III extenders

    Experimenting stacking two 2x extenders (II and III version) and trying to photograph the moon using 7D MkII. ISO1000, 1/125, f11. Camera doesn't recognize the other extender and autofocus doesn't work. Regards, Juhani
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