Reviews and Problems with Sigma AF 18-50 mm f/3.5-5.6 DC
Showing 1-7 of 7
Used for IR photography
10 October 2010
Summary: Bought this lens because it was less than $100 and works in the IR spectrum without hotspot. As with any lens in IR, you may need to use live view to focus given the focus shift of the given wavelength. At 18mm, focusing without the live view, it is spot on. At 50mm however, live view is required. It isn't as sharp compared to my other $400 sigma lenses, but for IR work, it imparts a certain feeling to the picture that i rather like. Otherwise, great lens for the price.
Summary: I purchased this lens because of is low price. I recently purchased a Canon 7D and wanted a wide angle lens but really couldnt afford good glass. This lens gets the wide shots but it's not the sharpest.(nor is it close.) I am happy witht he lens based on my current need for a wide angle and it's super low price. As soon as I get the funds I will be upgrading. Good for now.
Summary: What can you say? I bought this as a cheap back up lens. This is a basic, no-frills, inexpensive lens. It is well-made, but picture sharpness is hit or miss, it seems. I am an amateur, so I can't tell if there is any distortion at either end of the zoom range, or in the middle. I haven't seen any significant chromatic aberration yet, but I expect there to be some considering how cheap this is. The auto-focus has difficulty in dim light and bright (sun) light.
Summary: This lens is a must if you are replacing a bad lens. I currently use the E-500 and this is a gem. I love it more so, since it has a fairly wide angle for pictures but more so since I can engage a manual switch on the lens and not rely on power manual focus. It focuses quickly and pictures are clear with little noise.
Summary: I am enjoying the lens. At least to my eye the pic are as good as the kit lens that I got with the Olymps E-500 camera. The macro capabilities are good if you are not taking pics of a pinhead. Service from BH was excellent.