Up until a couple of weeks ago I made do with my wide angle kit lens, an 18-55mm to work on landscapes. However, on many occasions I found myself struggling to get a proper composition with enough foreground interest and sky.
I haven't yet made a leap to a full frame camera yet, so the actually readings on the lens, i.e. 18mm would have to be multiplied by the crop factor of my camera (x1.6 for Canon's). So 18mm is actually 28.8mm. Full frame sensor camera's are simply cameras in which the digital sensor that record the image are the same size as frame on a 35mm film camera.
I won't go into a technical review here as you can find plenty of those online. The particular lens I bought is a Sigma 10-20mm f/4-5.6 EX DC HSM. I did quite a bit of research before I chose this, and generally it came out top for price V performance, you'd be paying a couple of hundred more for something that's marginally better; for me this was more than fine.
So I've attached two photos below to compare the angle of view with my kit lens. I setup the shot using a tripod and camera set to manual mode, all I did between shots was simply change the lens:
18mm kit lens:
10-20mm Sigma @ 10mm:
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