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Sigma 28mm f 1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras

Sigma 28mm f 1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras by Sigma $449.00 At Amazon on 12-11-2011.

Macro focusing capability with fast F1.8 maximum aperture Minimum shooting distance of 20cm 7.8 inch Dual-Focus DF mechanism Features minimum focusing, down to 20cm/7.9inches (reproduction ratio 1:2.9). The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus image. It incorporates the floating focus system and the use of two aspherical lens elements to minimize distortion, spherical aberration and astigmatism. The lens incorporates minimum vignetting optical construction in order to obtain adequate peripheral brightness with open aperture. Internal focus system of the lens eliminates front lens rotation, thus allowing the use of a Perfect Hood and easy use of polarizing filters. The lens also incorporates a dual-focus mechanism. It is easy to hold the lens, since focusing ring does not rotate during auto-focus, and yet provides adequate torque of the focusing ring during manual focusing of the lens. The lens materials used in this lens are lead and arsenic free ecological glass. From precise macro to wide-angle shots, this lens performs very, very well. The images it produces are tack-sharp. I have all but abandoned my 50mm f/1.8 on my 50D...this lens is closer to "normal" on the crop sensor. The bokeh is marvelous: creamy, smooth, and dreamy. The colors are typically Sigma: that is to say a little warm and not overly saturated but not exactly subdued. The build quality is far better than most Canon lenses in this price range, which is also typical of Sigma. The auto-focus performs well, occasionally seeking at very close macro distances, but that is normal for the small DOF of macro lenses, plus I do not have a ring- or macro-light. As I said, I use this lens as "normal" on my crop bodies but on the 5D (I have the original not the Mark ii) it really shines as a wide angle lens. 28mm is the perfect indoor angle offering enough field of view to capture everyone in your scene but still allowing use of flash to fill the dark spots using my 580 EX II. I have essentially stopped using the 24-105 f/4L for wide angle work because this lens is so sharp. Now, the obvious strong point of this lens is the f/1.8 aperture which is sharp, sharp, sharp even wide open with virtually no falloff and almost no CA. I never hesitate to just leave it wide and shoot in TV mode to stop action or to create action trails. Using it indoors at 400 ISO I get perfect images every time without the harshness of flash. I have used this lens on these bodies with excellent results: 50D 5D Rebel XTi (400D) Elan 7 (35mm film) Elan IIe (35mm film) EOS 3 (35mm film) So for crop or full frame, this is a great walk around, macro, and wide angle lens. Back To Top Sigma 28mm f 1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras Available from Amazon Price: $449.00 Updated on 12-11-2011.

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