-Compatible with all Arri PL compatible video cameras.
-The lens tubing is the part of the Lensbaby that allows you to control the effect that it gives. It can be compressed or extended by pulling or pushing the focusing collar at the end of the Lensbaby. This in turn controls what is in focus, with fully compressed focusing on infinity and full extended focusing about 1 foot ahead. To focus on subjects that are between these
distances, you have to partly compress the Lensbaby.
-The lens aperture can be changed by inserting different size magnetic aperture discs, with a choice of f/2, 2.8, 4, 5.6, 8, 11, 16, and 22.