The large angle of view (122 degrees super wide angle of view at 12mm along the diagonal axis) is ideal for shootings indoor as well as landscape photography. It has a variable angle of view from 122 degrees at 84.1 degrees. Four Special Low Dispersion (SLD) glass elements are provided for effective compensation of color aberration, which is a common problem with super-wide angle lenses. Two pieces of Glass Mold and one-piece hybrid aspherical lenses offer excellent correction for distortion as well as all types of aberration. By effective arrangement of lens elements and advanced technology this lens has Super Compact dimensions of 3.9 inches full-length, and 3.4 inches maximum diameter.List Price: $779.00
Amazon Price: Too low to display
Customer Review: Gorgeous lens
I love it. Considering the extreme wide angle of this lens, when used with my 1DS Mk III, the distortion in minimal and my RAW processing software corrects that anyway. Great price, great optics. I love my Sigma lenses so much I own two of my 18-200 lenses so I can have two cameras loaded with them at once. Canon is great, but you'd be hard pressed to tell the difference between Canon's equivalent to this lens. I own both. The only downside to this lens design is the lack of front-mount filters. You have to treat this lens very gently, as you cannot install a UV filter to protect the coated glass front element. In some ways, of course, this is better, as you have nothing between the lens and the subject but air - but you have to use rear-mount filters and that pretty much excludes polarizers, which I use a lot.
Customer Review: Impressive performance and value.
I bought this lens to service a new client that does virtual tours for hotels and resorts. Their lens requirements are 18mm for full frame digital cameras and 12mm for DX chip cameras, to shoot 360 degree VRs. I didn't want to invest the 1000.00 plus dollars for another Canon lens and Canon or anyone else for that matter doesn't make a lens with this range. The Sigma would allow me to use both my 1Ds Mk II and 20D to service this client and cost me half what anything Canon provides. Having bought the lens mainly for Internet content, I wasn't going to be too critical about image quality from it, but I've been very surpised and pleased by it's performance. This lens has the least amount of barrel distortion of any wide angle zoom lens I've ever used. Even less than some primary lenses. To the point where it is essentally undetectable to the naked eye. It has less barrel distortion than my 1000.00+ 24-70mm f2.8L Canon lens! Operation is smooth, fast and constructions is first rate. I haven't done any critical sharpness comparisons yet, but I haven't noticed any problems from the images I've taken so far. The lens has a very bulbous front element, so conventional filters and lens caps won't fit. But Sigma cleverly includes a high quality adapter ring with filter threads in one end that slides over the built in lens shade on the lens. A lens cap is also included that fits on the end of the ring to protect the front element while being stored. The ring vignettes at 12mm on a full frame camera, but does not on DX chip cameras. So on those cameras, conventional thread on filters can be used with by screwing them on to the end of the adapter ring. You could do also this on full frame cameras, at longer focal lengths. A gelatin filter holder is provided on the back of the lens, but I can only imagine this being useful with film cameras. Overall, I'm very impressed and satisfied with this lens. I highly recommend it.
No comments:
Post a Comment