Consists of black anodized aluminum mounting, 4 glass lenses, spacers, stops and a retaining ring. The lenses are: 12 mm diameter meniscus, FL= -33 mm; 10.5 mm diameter achromat, FL= 250 mm; 12 mm diameter achromat, FL= -36 mm; and 10.5 mm diameter plano-convex, FL= 25 mm. Focal lengths are estimated.
