What 35mm Adapter would you choose?

The 7d is an amazing camera and it along with the GH 1 will mean serious trouble for any 1/3 or 1/2 inch cameras. 2/3 inch chips and the DVC Pro HD codec makes the comparison with an HPX a little more fuzzy.

Granted the image size is bigger but the compression used kind of nullifies the advantage. However, if price is an issue the 7d is a clear winner. I just think my clients would freak out if I showed up to shoot a high end video on a DSLR. I know this is a perception thing. But in this business, often, perception is reality.
 
I'm new to 35mm adapters as well. I looked at the Letus relay system, but what is academy framing? I undertand it doesn't give the full field of view the 35mm lens provides.
It seems Brevis (Cinevate) also has a 2/3" relay lens that gives full 35mm viewing. Doesn't the Brevis adapter not need the support rails? Does anyone have experience with the Brevis relay lens?
 
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Academy is the frame used for 35mm motion picture cameras. Full frame 35mm is for film 35mm SLR cameras and many DSLR cameras.

The Letus B4 Compact and Pro 2/3" relays are Academy framing because many users prefer 35mm PL-Mount lenses, such as Zeiss Super Speeds. Of course, you can always use full frame 35mm SLR lenses as well.

The Letus B4 Compact and Pro relays have 17% less cropping than the P+S Pro35 adapter, offering a true Academy frame. The depth of field for full frame 35mm is really too shallow for narrative work--most professional AC's would run away if told they are pulling focus for full frame 35mm cameras like the Canon 5D.

Regarding the Cinevate variable relay--nobody really knows much about it because it's missing in action, no deliveries to date. Meanwhile, Letus, as promised, offers two 2/3" relays, as well as a 1/2" and 1/3" relay. I've been using the Letus B4 Pro since March.

Rods should be used with any 35mm DOF adapter/relay/taking lens setup for support of the glass as well as matte box and follow focus.

Final word: Academy framing has worked for decades with motion picture cameras, not sure why full frame 35mm would be seen as necessary and indeed makes focus more of a challenge.
 
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