Request InfoUniverse Kogaku (America) Inc.Universe Kogaku (America) Inc. has developed a line of ruggedized lens assemblies for use in applications requiring extreme durability, high resolution and field flatness. The Model P/N EL-50 is a 50-mm, f /2.8-16 lens assembly with a six-leaf adjustable iris. The Model P/N EL-50S is a 50-mm f /2.8 fixed-iris lens assembly with a selection of alternative fixed apertures. Both models feature a compact, all-aluminum barrel construction; six-element, all-glass lens design; and 43.3-mm sensor coverage.See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra September 2022 IssueLight-Dependent Resistor PhotocellsCadmium Sulfide (CdS) Light-Dependent Resistors (LDRs) from Advanced Photonix Inc. are designed for visible light measurement from 400 to 700 nm. 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