The Lensbaby Wide Angle/Telephoto Kit consists of the 0.6X wide angle and 1.6X telephoto conversion lenses. The Wide Angle lens converts your Lensbaby's 50mm focal length to 30mm, while keeping the "sweet spot" the same size as a Lensbaby photo taken without a wide angle conversion lens (other wide angle conversion lenses shrink the sweet spot).
The 1.6X converts the Lensbaby to 80mm and slightly increases the size of the sweet spot.
These conversion lenses are fully compatible with all 37mm front threaded Lensbaby optics. They are not compatible with the Edge 80, Sweet 50, Sweet 35, or Fisheye Optics.
Note: Slight horizon line distortions (fish eye effect) sometimes occur when the sweet spot is pushed far off center.
37 mm threads, screws on the front of your Lensbaby