Nikon 200-400mm f/4 lens

Sigma 150-600mm Contemporary lens field test: Excellent value in a lightweight telephoto zoom

Nikon and Canon’s long glass may be getting slightly lighter over the years, but those flagship lenses are also getting incredibly expensive. Fortunately there is a crop of third party value-priced lenses that have arrived to help out consumers. We’ve reviewed several of them in the past, like the , , and , but until now hadn’t gotten the chance to take the lighter-weight of Sigmas two superzooms, the into the field. Our annual Alaska bear & puffin photo safari was the perfect opportunity. Two weeks of mid-range use for the bears coupled with longer-range use with the Puffins gave me a chance to put the lens through its paces.

New value-price wildlife lens champion: Tamron 150-600mm zoom field-tested

Wildlife photographers have some amazing, and amazingly expensive, lens options from Canon and Nikon, but for many the huge price tags – not to mention large size and weight -- make them impractical. Instead, they have needed to compromise image quality to meet their budget. Fortunately, modern manufacturing techniques and lens design software improvements have continued to improve the quality of third-party value-priced lenses. The first of this new breed is the that I field tested in Texas during my workshops this month...