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Coated Optical Glass Doublet (Sweeter sweet spot) Focal Length: right around 50 mm Focus Type: Manual... Fingertip, actually Aperture Type: Interchangeable levitating aperture disks Aperture: f2.0, f2.8, f4, f5.6, f8 Minimum Focus: about 12” Maximum Focus: infinity and beyond Size/Weight: 2.25" high x 2.5" wide / 3.7 oz. Note: a Lensbaby does not communicate electronically with your camera body