Explore Scientific is trying to prove that it can make perfect glasses for every pocket - better than others. The LER 52 series are argon-filled, waterproof glasses with a much greater exit pupil than Ploessle, with great layers and very good flatness of the field. • focal length: 40 mm
• AFOV (own field of view): 52 °
• construction: 4 elements in 2 groups
• layers: EMD
• exit pupil offset: 27.1 mm
• filter thread: yes, 2 "(M48 x 0.75)
• waterproof, filled with argon
• cast standard: 2 "
• weight: 390 g 10 years
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