Sigma B00005RKSS

Review for Sigma 28mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras. It incorporates the floating focus system and the use of two aspherical lens elements to minimize distortion, spherical Sigma B00005RKSS aberration and astigmatism 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 incorporates minimum vignetting optical construction in order to obtain adequate peripheral brightness with open aperture Minimum shooting distance of 20cm (7.8 inch) Dual-Focus (DF) mechanism ... Learn more »

Sigma B00005RKSS Review: Sigma 28mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras. Let me start by saying I'm not a hardcore fan of any particular brand. I like to gauge lenses by their individual merits, rather than discussing them as a brand.The Sigma 28mm f/1.8 EX is an excellent lens from an optical standpoint. On digital and film SLRs from Nikon, I was always quite impressed with the optical quality. Even wide-open at f/1.8, it is roughly as good as the Nikkor 50mm f/1.8, which is somewhat low in contrast, but still resolves quite a bit of detail on ... Read more »

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