Zeiss 15mm f2.8
One of Zeiss’s sharpest and most contrasty lenses is also one of the best for shooting architecture. It’s quite pricey though and only available for DSLR cameras. However, you’ll be very happy with the results that it’s capable of delivering.
In our review, we state:
“You also most likely won’t be shooting photos of people all the time with this lens. However, if you’re an architecture fiend, this may be the one that you’ll always want in your camera bag. The distortion control is insanely good but when photographing a subject wide open, you’ll experience vignetting (but that’s easily corrected in software.) It’s often best to photograph a subject stopped down due to just how insanely sharp this lens becomes. However, like the 25mm f2, you’ll get the best colors when shooting wide open.
For interiors though, this is an excellent lens. Real estate photographers, party photographers, and wedding photographers will make great use out of it. It is once again a specialized lens, but it will help you to create some awesome images.”