A couple weeks ago after I got back from Japan I bought an anamorphic lens off eBay for my 7D. It finally arrived yesterday and now I have to try and find a way to attach it. Since nearly all anamorphic lenses that are adapted to DSLRs are from projectors they require special clamps and adapters to attach to DLSR lenses. I spent a lot of time today researching different methods from using lens clamps to getting a custom machined device. The lens I bought is from a 35mm projector so it is quite large – 70mm for the back barrel and 110mm for the front. I was unable to find any clamps big enough to fit around my lens since all the clamps I found were for 16mm projector lenses which are around 52mm for the back barrel. So I have to come up with my own way of attaching. I ended up with the following – using adapter rings to convert from 58mm to 77mm, then use a 77mm spacer tube which should fit around the 70mm rear barrel. I should then be able to drill three holes around the spacer tube and insert thumb screws which I can tighten to clamp the lens. See the diagram below. So I have bought all the various parts off eBay and now I will have to wait a week or so to see if this plan works. I hope so. Another thing a will probably have to do is get some rail supports since the lens weighs about 1.5kg!

Click to enlarge.