The angle of video of a Canon 600mm f4 EF Lens with a 2X converter on a RED Epic, is roughly one degree. (1 Degree, 45 arcminutes horizontally to be exact.)
To read more about this go to my blog: http://tinyurl.com/4yvx3th
The focal length in terms of 35mm is more than 3400mm - not too shabby when you consider this was shot at 4K, 120fps in full RAW on the Epic.
This was shot with the yet-to-be-released RED Canon mount - which has full support of Autofocus, Image Stabilization, digital aperture control, touch to focus, touch to rack focus, and distance readout. These are pretty amazing times to be behind the lens.
While long lenses are nothing new in the motion picture world - this type of resolution combined with Canon's Image Stabilization technology is utterly impressive and should be a huge hit with wildlife and sports photographers around the world.
This is once again an example of technology allowing us to pull things off we once thought impossible (or could be done with a lot of additional technology)
This was shot in Mono Lake on afternoon over 45 minutes after the sun had set behind the Sierra Mountain range until everything went dark. ISO ranges from 800 ASA to 2000 ASA. This was shot on an O'Connor 1030HD head on sticks with one operator (in this case that was me) doing the focus pulling.