Very Rare Vintage Wide Angle Large Format brass lens F8 Cover 8×10. Measured focal distance is about 170-180. Arrived within a large bunch of english cameras and lenses. No scratches, no fungus, no chips. Front Barrel diameter =. Diameter = 45 mm. Rear barrel diameter = 40 mm. Diameter = 35 mm. Very hard to find. Comes with a mounting flange. Buyers with a feedback of less than 10 points should contact me first!