A look back at the Sigma Zoom-Gamma 21-35mm F3.5~4, the world's first wide-angle zoom lens.
Imagine being able to replicate the use of four wide and ultra-wide-angle primes from 21, 24, 28, and 35mm with a single zoom unit that combines the four focal lengths into one, albeit longer in length and heavier in weight than any of the four.
Firstly, of course, is the substantial saving in cost, followed by the ease of carrying only one lens rather than four, and the ease of changing focal lengths on the fly.
That was my frame of mind when I ordered a 'rare' listing of the OM-mount Sigma Zoom-Gamma 21-35mm F3.5~4 lens./p>
Online reviews indicated that this is an exemplary lens, ground-breaking, trail-blazing, with a reputation to match.
The Zoom Range
@ 21mm
@ 24mm
@ 28mm
@ 35mm
The Options
The views above are just about that, a quick early morning take looking down the dead-end road just outside of where I am staying.
The sequential images above were cropped to the 16:9 image aspect to adjust for the framing shifts from my handheld shooting, while the high-rise monstrosity is in the camera's native 4:3 aspect ratio.
All shots were taken at f/5.6, as recommended by the reviews, post-processed on Olympus Viewer 3 (OV3), with the final sharpening done on Google NIK Sharpener Pro 3.
The Lens
The lens, the world's first, is a super solid all-metal construction composed of 12 elements in 12 groups. Weighing about 450 grams and measuring 105mm in length, the lens came with a built-in floral pattern hood and takes in a 67mm filter size.
Though slightly front-heavy when attached to the OM System Camera with a Winder 2 attached, the feel is just right and balanced for my smallish hands.
On the Olympus Pen E-P5
On the E-P5, however, with the added extension to its overall length by the MF-2 adapter, my concern is more towards the fragility of the combination, which calls for extra care and concern while handling and doing shoots with the lens.
The image above is of my aged table lamp shot with the lens setting at 35mm, f/8, close to the lens's closest focusing distance of 0.5m, while out in the garden, the Maidenhair Fern (final image) looks rather splendid when sharpened to accentuate its lacy spread.
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