Zeiss Negative meniscus lens Ø42mm FL -250mm MultiCoated HR optics #724-18

Description

Zeiss negative meniscus CXCV lens Ø42mm FL -250mm MultiCoated HR optics
(Projector image extension)
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:
42
mm
Focal Length:
-250
mm
Diopters:
-3.75
Thickness:
4.8
Radios:
R1=133.5mm R2=863.94
Coating:
yes
Optical standard:
unknown (most probably
BK-7 substrat).
Brand:
Zeiss.
Class A:
no issues known.
Sent in anti-acid organic paper which avoids harm to optics in the long term.