Request InfoWestech Optical CorporationWestech now offers eight-element board lenses for demanding high-MTF applications. Focal lengths are from 2.1 mm with f/2 apertures. Most have M12 x 0.5P threads and are available with or without IR cutoff. Other HR lenses are available with four- or six-element designs. Apertures start at f/0.8. Don’t pay catalog prices for OEM optics. 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