G-4 Four-Mirror Gonio High Mag - No Flange, Large Ring
Standard Gonio Lens for Static and Dynamic Gonioscopy. No flange and a large ring. Lens is G-4 Hi Mag with a field of view of 4x64 degrees, an image magnification of 1.5x, a laser spot of 0.67x and a contact diamter of 8.4mm. Manufactured by Volk.