Lensbabies Control Freak

Control Freak for Nikon F The Control Freak is an ideal selective focus lens for tabletop and macro photography. You can compress and bend the lens to find your desired Sweet Spot, and then lock it in place with the push of a button. Once locked, you can fine focus using the barrel focusing ring and fine tune the tilt with the Control Freak's three metal posts.

Double Glass (multi-coated optical glass doublet) Optic installed
Focal Length: about 50 mm
Focus Type: Manual/Fingertip
Aperture Type: Interchangeable, levitating aperture disks
Apertures: f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22
Minimum Focus: about 9" / 23cm (Allows for extremely close focus - zero inches in front of the lens - when used with the Fisheye Optic. A special adapter is required to use the Fisheye Optic with the Control Freak).
Maximum Focus: infinity
Size: 2.25"(5.7cm) h x 2.5"(6.35cm) w / Weight: 3.7 oz (104.9g)
No electronic communication between the lens and the camera body
Automatic light metering is possible by shooting in aperture priority mode for almost all digital and film SLR camera bodies except certain Nikon bodies including the D40, D50, D60, D70, D70S, D80, D90, D100, N50, N65, N70, N75, N80, Kodak 14N and ProN, & Fuji S1, S2, and S3.