Sigma Zoom-γ 21-35mm 1:3.5~4, The Zoom Range

Olympus E-P5, Sigma Zoom-γ 21-35mm 1:3.5~4 @21mm

Olympus E-P5, Sigma Zoom-γ 21-35mm 1:3.5~4 @24mm

Olympus E-P5, Sigma Zoom-γ 21-35mm 1:3.5~4 @28mm

Olympus E-P5, Sigma Zoom-γ 21-35mm 1:3.5~4 @31mm

The Vintage Enthusiast: Testing the zoom range of the Sigma Zoom-Gamma 21-35mm 1:3.5~4 lens, the world's first wide-angle zoom.

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Testing out the zoom range of the Sigma Zoom-Gamma 21-35mm 1:3.5~4, the first 2-ring version of Sigma's Gamma series of ultra-wide-angle zoom lenses. This version was introduced in 1979. Economical, as it covers all four of the most important wide-angle focal lengths, the 21mm, 24mm, 28mm, and 35mm, in one compact combo.

On an MFT (Micro Four-Third) digital, the Zoom-Gamma 21-35mm 1:3.5~4 will be a standard zoom with the equivalent focal lengths from 42 to 70mm. The lens incorporates Sigma's unique floating element system, virtually eliminating all aberrations throughout the entire zoom range.

Olympus E-P5, Sigma Zoom-γ 21-35mm 1:3.5~4

It is a super solid all-metal with 11 elements in a 7-group construction, weighs about 465 grams, and measures 105mm in length. The F stop range is 3.5 to 22 with half-stop clicks, and the lens is fitted in a floral pattern hood and takes in a 67mm filter size.

Olympus E-P5, Sigma Zoom-γ 21-35mm 1:3.5~4

Images were shot with the lens mounted on the Olympus E-P5, at the focal length indicators of 21mm, 24mm, 28mm, 31mm, and 35mm. Post-processing and print finishing was done on Olympus Viewer 3 (OV3) and Google Nik Sharpener Pro 3.

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