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Biconcave lens, N-BK7, Ø 22.4 mm, f = -40 mm, RAL
€ 49,00
Biconcave singlet in N-BK7, Ø 22.4 mm, focal length -40 mm. RAL coating. Negative focal length: diverges the beam, for beam expanders and to shorten system length.
On request
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