Lensbaby 2.0 Canon EF Mount SLR Camera Lens (LB2C) High refractive index, low dispersion, coated glass doublet allows tack sharp sweet spot Magnetically suspended disc aperture system allows f/2.0, f/2.8, f/4, f/5.6, f/8.0 aperture settings. All aperture settings included. 37 mm threads allow you to attach Lensbaby Macro Kit lenses, wide angle and telephoto conversion lenses, and other filters and accessories Anodized aluminum components provide an extremely durable design Note: Lensbaby does not communicate electronically with your camera body