LaCroix Optical part #18305. Negative Meniscus, 121.975mm (4.802") diameter by -1303.64mm focal length. Center thickness is 15.00mm. Glass is N-BK-7. Has Broadband coating with less than 0.5% reflection in the 450nm to 650nm range. Complete spec sheet will be included with your order. Unused. Only have a few.
