I'm looking to "upgrade" from my Canon 70D to a 6D for multiple reasons. But my primary income generation from the camera will be real estate photos. So that brings up what lens is the most ideal?
Currently with my 70D I use a Sigma 10-20mm f/4-5.6, this lens is really not a good lens and I would never recommend it to anybody. However, it's what I had and nobody but me seems to complain. Ideally for a crop sensor I gather that Canon's EF-S 10-18mm and 10-22mm lenses are the ideal lenses. Perhaps with the 10-22mm being a bit sharper?
I see that a lot of people here use either a Canon 17-40L f/4L, or 16-35 f/4L or f/2.8L. The 17-40 is undoubtedly the most cost-effective, but I wonder how much difference that extra 1mm on the wide end makes? I find that I already shoot most photos at 10mm with my crop sensor. I'm not really considering a non-zoom (like a TS-E or a Rokinon prime) as I'd almost definitely have to buy more than one lens (I do interior and exterior and don't need/want the wide end for exterior) and this would also increase the amount of time I spend on site. However, I really like the sharpness of some of the wide-angle Rokinons and, of course, that low price.
I see that Tamron has come out with a 15-30mm f/2.8 VC. It has some good reviews and it is right around the same price as a 16-35mm f/4. I don't care so much about the extra speed or IS, but that's yet another millimeter wider of focal length... Anybody have any experience with it?
Anybody else have any other lenses they'd consider for such tasks? And what's your dream lens and what's the lens you actually use day-to-day?