Finally I manage to bring my newly acquire Sigma 10-20mm for landscape shot, I decided to go back to Empire Hotel for another tried up.
While looking at the photo you can’t really tell is it using an ultra wide or not, but for me 10mm is really a deal breaker. The coverage is so wide that it is just impossible to do it before, all my shoot in here wouldn’t be possible if I am using my 18-55mm. If I want to use 18mm to cover the same coverage, I would need to take 4~8 shoot and stitch them together for the same effect.
But the convenient also came with a cost, it is much more difficult to make a good composition and level the photo nicely due to distortion of the coverage, so have to be quite careful when composing. But it also make sell portrait so much easier >w<