Replaceable objective lenses 2x and 3.5x are designed to be installed on night vision monoculars of the Challenger 2+ series. Compatible models are: Challenger G2+ 2x42 (74092), 3.5x56 (74093) and Challenger G2+ 2x42 B (74092B), 3.5x56B (74093B).
The lenses increase (or decrease) optical magnification and light gathering capacity of the night vision monocular depending on the replaceable lens.
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