I needed a wide lens for some real estate work I have coming up. I've invested heavily in the telephoto end but I'm not quite ready to plop down a ton of cash on the 8-15L, or even the 16-35L. Instead, I bought the 10-18 EFS for $350 (with the new 50 1.8 stm to boot). Turns out, ML 3k cropped on the 5d 3 fits just inside the image circle even at 10mm. The lens is also usable for stills from 14-18 on the FF 5D.
You'll have to hack (literally, hacksaw) off the plastic bit that prevents you from mounting it, but it's so worth it. It appears that most EF-S lenses can be converted easily. The 17-55 2.8 literally requires no tools, the plastic just pops off.
You'll have to hack (literally, hacksaw) off the plastic bit that prevents you from mounting it, but it's so worth it. It appears that most EF-S lenses can be converted easily. The 17-55 2.8 literally requires no tools, the plastic just pops off.