Vid-Atlantic's clamp kits will work with a wider variety of Anamorphic lens to SLR lens combinations than other clamp brands, making it more ideal (and affordable) for experimenting with various setups.
These clamps give your Anamorphic lenses standard filter thread diameters sizes & allow you to lock in a proper horizontal alignment! Mount & properly align a wide variety of lenses to cameras like the Canon 5D, 7D, t2i, 550D, 600D, t3i, 60D, 70D, Nikon D90, D610, D800, GH3, Black Magic Cameras, Red Cameras, Digital Bolex, etc. and 35mm adapters.
Vid-Atlantic's Front Filter Clamps give your Anamorphic lens fronts standard sizes (77mm or 72mm) allowing you to mount filters like polarizers, Neutral Density, Fader ND, or other accessories like the Single-Focus Rangefinder from SLR Magic.
XL Clamp Kit: This Clamp is for large Anamorphic attachment lenses that have a back-end base larger than 57mm in diameter but smaller than 81mm in diameter. The mounting thread size of this Clamp is a standard 77mm and includes a 72mm step-up ring giving you 2 sizes in 1 kit. To use the XL Clamp on SLR lenses with front thread sizes other than 77mm or 72mm, you'll need simple step-up or step-down rings found for a few dollars on ebay or in most camera shops. (Pictured in photos 4, 5, & 6 above)