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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

    Have scopes nowadays Porro or Roof prisms?

    In relation to Swarovski's offerings . . . Draw Tube Telescopes As Henry indicates, the first series of AZF draw tube telescopes used Abbe-Koenig prisms. The 30x75 version was introduced in 1967, and the 25-40x75 followed in 1983. They remained in production until 1992. There were both...
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