E-87-188 C-Mount Achromat Pair 1:1 with 50 and 50mm Focal Lengths product-series_pretium-edge-housings Tested in accordance to TR-NWT-000251
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E 87 188 C Mount Achromat Pair 1:1 with 50 and 50mm Focal Lengths product series_pretium edge housings Tested in accordance to TR NWT 000251 Tested in accordance to TR NWT 000251 by an independent outside lab Top or Bottom: Bottom