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

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  1. W

    Older alpha vs newer mid-range scopes

    Have to play about to check, rather grey weather so might take a bit. I normally “tune” the SDL to get the best compromise of brightness and field for the conditions and only occasionally dial up the magnification, though the contrast drops if you go too far. I don’t like the low power narrow...
  2. W

    Older alpha vs newer mid-range scopes

    I get some CA with the sdl3, swapped to using the 23x fixed focal length on my 60MM4 recently. Wide enough and bright and harder to spot any CA. Peter
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