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

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  1. John A Roberts

    Sticky Focus Wheels

    Hi Ignatius, Also from the 2007 catalogue: another image showing the main body of the focuser more clearly; along with accompanying text referring to 'almost no lubrication': John
  2. John A Roberts

    Sticky Focus Wheels

    . . . and on occasion there's also been problems with the NL e.g. see: NL Focus Wheel Problems After Washing Perhaps aggravated by the unusually enclosed focus wheel? Images from Roger’s review at: Swarovski 8x42 NL Pure Review John
  3. John A Roberts

    Sticky Focus Wheels

    Typically with centre focus binoculars . . . Due to mechanical needs, external focus designs require heavy grease on the focuser shaft * But in contrast, internal focus designs are able to largely dispense with lubrication. By way of comparison: a) Zeiss Jena 8x30 Deltrintem from a 2016...
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