VERY RARE DARLOT PARIS HEMISPHERIQUE RAPIDE? 2. According to measurements it has a focal distance of about 10 inches. And a nice aperture about F4.5 or similar. That is fine for portraits. According to measurements it covers 5 x7 camera. Lens has been professionally rehoused into Eastman Kodak Ball Bearing shutter. OPTICAL CONDITION IS EXCELLENT. Glass is nice without any scratches, fungus, separation etc. The brass barrel is in good condition. Height = 7 cm. Front barrel diameter = 4.8 cm. Front and rear glass diameter = 3.2 cm. Rear barrel diameter = 3.8 cm. Aperture blades work nice! This is a fantastic lens for usage or. Comes with original mounting flange and a bonus wooden board 4×4 (about 101×101 mm). Buyers with a feedback of less than 10 points should contact me first!