Until recently, most photographers considered a 19mm or 20mm focal length as the ultimate in ultra-wide, but this is rapidly changing. Thanks to the new technologies for making more affordable aspherical elements, much shorter lenses are becoming readily...
Aside from the intricacies of exposure and light metering, photo enthusiasts generally find depth of field the most difficult concept to master. That's understandable particularly since this is a hypothetical factor based on subjective judgment.
Is there a serious photo enthusiast out there who doesn't harbor a desire to see his or her work published? Well, the vast majority I know would love to market their images to books, magazines, and advertising agencies. In fact, the most commonly...
Although many of Sigma's new lenses incorporate the latest technology and/or premium grade optics, this manufacturer continues to compete aggressively in the market for affordable zoom lenses. In addition to its APO, Aspherical, and HSM series, Sigma...