72mm

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Lens Exploration: Sigma 18-35mm F1.8 DC HSM | Art

Introduction: Sigma 18-35mm F1.8 DC HSM | Art The Sigma 18-35mm F1.8 DC HSM Art lens is revolutionary. Never before has a zoom of this range...

LENS EXPLORATION: 18-300mm F3.5-6.3 DC OS | Contemporary

Sigma Pro David FitzSimmons explores the possibilities with the 18-300mm | C lens.

Why Circular Polarizers Still Matter

A high quality circular polarizer is still one of the most important accessories for any photographer’s bag. And the new Sigma...

On Safari in Tanzania

© 2013 Roman Kurywczak | Lens: Sigma 300-800mm | Aperture: f/8 | Focal length: 536mm | Shutter speed: 1/1000 sec. | ISO 800 I have been blessed...