Zeiss Negative Meniscus CVCX lens Ø41mm FL -4000mm Dpt. -0.25 MultiCoated

Description

Zeiss Negative Barlow (meniscus) CVCX lens Ø44 FL -4000 MultiCoated
These authentic and original optical parts come directly from a surplus (close-down business in Germany).
Great for DIY and research projects.
Purpose:
Carl Zeiss manufacturing process (several sources involved, including Schneider).
Diameter Ø:
45
mm (max. diameter)
Focal Length:
-4000mm
Diopters:
-0.25
Coating:
multicoated
Optical standard:
unknown (most probably
BK-7 substrat).
Brand:
Zeiss.
Class A:
no known issues.
Sent in anti-acid organic paper which avoids harm to optics in the long term.