Monday, May 6, 2019

Analog Diary, Sigma Zoom Gamma 21-35mm F3.5~4

Analog Diary, Sigma Zoom Gamma 21-35mm F3.5~4 01
Analog Diary, Sigma Zoom Gamma 21-35mm F3.5~4 02
Analog Diary, Sigma Zoom Gamma 21-35mm F3.5~4 03
Analog Diary, Sigma Zoom-y 21-35mm F3.5~4 04
Analog Diary, Sigma Zoom-y 21-35mm F3.5~4 05
(Click images for higher resolution views)

Analog Diary, Sigma Zoom Gamma 21-35mm F3.5~4

'Five frames with the super wide-angle Sigma Zoom Gamma 21-35mm F3.5~4 lens.'

The Sigma Zoom Gamma 21-35mm F3.5~4 is quite a remarkable lens, with good image quality, and a zoom range that is hard to replicate or replace. The lens was launched by Sigma in 1979, as the world's first wide-angle zoom lens.

Sigma Zoom Gamma 21-35mm F3.5~4
The lens is a solid all-metal and glass construction, with 12 elements in 12 groups, 105mm in length, weighs 450 grams, comes with a non-rotating front element, takes 67mm filters, and has a built-in floral pattern hood.

The compact form factor is easy and comfortable in the hands, and on the Olympus OM-2S (the unit I was using came with an Olympus OM-mount), the camera and lens combo was a perfect fit in terms of weight and balance.

Focus, zoom, and aperture rings are conveniently located for fast handling. Focus throw is a short 90 degrees. Talk about built quality, the rings on my unit are still super smooth as if it was still new.

I also did an earlier post with the lens mounted on the digital Pen E-P5, which includes images shot at various focal range equivalents, but felt that the equation is not complete without a similar post with the lens mounted on what it was originally designed and produced for, an SLR film camera.

Olympus OM-2S, Sigma Zoom Gamma 21-35mm F3.5~4

This session here was down at the park, on a hazy day, with shots mainly of the landscape. The images, as you can see, turned out to be sharp, clear, and was better than expected. They were shot on a roll of expired Fujifilm Superia 200, post-processed on Olympus Viewer 3 (OV3) and print sharpened on Google NIK Sharpener Pro3.

EndNote: For those who are interested in a bit of technicality and an approach towards rectifying the 'fix' of the infinity focus problem of the Sigma Gamma, please visit the site here.


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