Phrased differently, those full-frame lenses on a crop body are happy projecting lots of photons (light) onto areas of black plastic at the back of the mirror box, and the camera/sensor is powerless (dimensionless?) to do anything with them. Imagine looking at life through one of those white plastic slide holders (you know, the mounts you'd put your slide film into so you could then load them into a carousel slide projector). Imagine that the outer boundary of the holder is what your lens can see, but the inner opening is what the sensor is capturing.
We're a Canon/Profoto family: five cameras, sixteen lenses, fifteen Profoto lights, too many modifiers.
Sean, there is magic, I think. I've been led to believe that there is a noticeable improvement in the latest 3 bodies, compared to the previous full frame sensors (I don't have the bodies on hand, feel free to send me a few!) For instance, I don't like to push my 1Ds2 beyond ISO1600, yet I see images from these new bodies at ISO25600 that are very usable. Some black-magic enabled a big jump in high-ISO usability, and that jump hasn't been done on crop sensors.
On Flickr - Namethatnobodyelsetook on Flickr
R8 | R7 | 7DII | 10-18mm STM | 28-70mm f/2.8 | Sigma 35mm f/1.4 | 50mm f/1.8 | 85mm f/1.8 | Laowa 100mm 2X Macro | 70-300mm f/4-5.6L | RF 100-500mm f/4-5-7.1L