Here's a very quick and simple look at the SLR Magic 1.33x Anamorphic Lens Adapter that can add an Anamorphic aesthetic to just about any lens you can fit it on. Compared to other Anamorphic Vintage lenses out there that can get quite heavy and require additional supports and adjustments, the SLR Magic Anamorph is pretty simple and basically screws on like a filter.
I have yet to go out and shoot as it's been storming out here in California, but at least you get an idea of what it is and how you can attach it to any lens in your kit. It will work on anything from a Micro Four Thirds camera to a Full Frame Canon 5D Mark III. It really depends on the lens you are mounting the SLRMagic to.
The image seen by the camera are 'slightly skewed', but to make life easier you can use an external monitor to scale the image in real time. The MustHD Monitors are an affordable line that offers this ability so that you can better frame, compose, and focus your shots. If you want to see some real world examples, you guys can take a look at the many other samples over on Vimeo (found here).
For information about the SLR Magic and optional Diopters bundle check out the product listing over at B&H
SLR Magic Anamorphot Lens Adapter