unfocused said:
Lots of third-party manufacturers make EF mount lenses. Yet, I've often wondered why there aren't some third-party camera manufacturers making EF mount bodies. For example, if Sigma made their bodies with Canon EF Mounts, it seems like they could compete a lot more effectively.
Here's the short/business answer, I'd imagine. Lets say a photographer buys a $2k camera body and 3 lenses, each at $1k. Canon makes 20% profit on each. So $5k spent, $1k profit for Canon.
Now, Blackmagic does the same thing (BMCC), they sell the camera for $2k and make 20%. They've made $400. Canon selling the 3 lenses makes $600. Canon still comes out ahead and that 3rd-party company has to sell 2.5 times as many cameras to turn the same profit. Since R&D comes with fixed costs (not relative ones), its a lot harder to innovate using someone else's money making tech unless the profit margins are massive.
The longer answer is you do see the EF mount all over, but, its usually targeted in markets where they think pros and hobbyists have lots of EF glass already and want a new body (see the Panasonic AU-EVA1). In the cheaper models, they'll put a MFT mount on for its versatility.
Another piece; I think if you are future looking, the E-mount is far more interesting than EF. I can adapt any EF lens to E-mount, but cant go the other way. Its why the guys from Magic Lantern, when they are building their cine camera, are
now using the E-mount