Digital Differential Pressure Switch

Digital Differential Pressure Switch

Digital Differential Pressure Switch

Though lacking the cachet of "original" lenses, third-party lenses can get high marks from reviewers. The Digital Photography Review website rates the Sigma 50mm f1.4 as better than the Canon 50mm f1.4 for image quality and build quality (8.5/10 versus 8/10).

This article describes the factors to look out for when considering a third-party lens.

Specialized Zoom and Prime Lenses

Back in the pre-digital 35mm film camera days, Tamron was the first, and for a while the only, manufacturer offering 28-200mm super zooms with a high zoom ratio. For anyone wanting a super zoom, Tamron was the only game in town.

It is still possible for third-party manufacturers to stake out pioneering positions in some niches. 50mm f1.4 prime lens with aspherical element for superior image quality? Sigma. The Sigma actually costs more than the Canon and Nikon 50mm f1.4 lenses.



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