The Essential Lensbaby experience, Pro Effects Kit for Canon EF. Take high-quality photos for creative effects with these products. There is no electronic communication between the lens and the camera body. Composer Pro Specifications: Refined metal ball design offers ultra-smooth focus and tilt control. Supplied with the Sweet 35 Optic installed COMPATIBLE WITH THE Lensbaby Optic Swap SYSTEM. Focus Type: Manual Size/Weight: 2.25" (5.71 cm) high x 2.5" (6.35 cm) wide / 4 oz (113.4g) Tilts, from zero to 17.5 degrees. Sweet 35 Optic Specifications: Length Range: 35mm 12-blade internal aperture dial, controlled by on the front of the fiber optic. Aperture range from f/2.5 through f/22 Selective Focus Optic (focus creates a sweet spot surrounded by gradual blur). Centers from approximately 7.5" to infinity from the front of the fiber optic when used with Composer, 6.5" with Scout, and 3" glass elements with Muse coating and Control Freak 4 optically, in three groups of 46mm thread Front (only works with the Lensbaby Macro Converter and not the 37mm Lensbaby Edge 80 Optics accessories). f/2.8 aperture through f/22 flat-field focusing optics (when tilted, creates a slice of shart focus, bordered by blur). Minimum focusing distance: approx. 17" when fiber optics extended forward. macro mode and is fully tiltable. Maximum focusing distance: INFINITY 5 multi-coated glass elements, in groups of four 46mm front thread (only works with the Lensbaby Macro converter and not the 37mm Lensbaby accessories). Macro Converter Specifications: The Lensbaby Macro Converters includes an 8mm converter and a 16mm converter. Stacked together they become a 24mm converter. Compatible with all Lensbaby lens bodies and optics. Ba