Sigma 105mm f/2.8 EX DG OS HSM Macro Review

Sigma 105 Macro
Sigma 105mm f/2.8 EX DG OS HSM Macro

The Sigma 105mm EX DG OS HSM is an improvement of a venerable macro lens created by Sigma for quite a while. The brand new lens is a total overhaul regarding the design: a brand new layout of elements, optical stabilization and HSM focusing technology comprise the big set of changes.
The Sigma 105mm EX DG OS HSM ended up being designed as a full-frame lens, as well as on ”sub-frame” APS-C sensor-based digital camera bodies the lens provides an equivalent field of view of either 168mm (Canon) or 158mm (Nikon as well as others). The lens will come in Canon, Nikon, Pentax, Sigma and Sony supports.
The lens takes 62mm filters, vessels with a round lens hood, and it is now available for about $570.
The Sigma 105mm ƒ/2.8 EX DG OS HSM provides a tremendously razor-sharp picture also available at ƒ/2.8, but also for optimum sharpness you’ll want to end down seriously to ƒ/5.6. There tend to be traces of part softness at ƒ/2.8, which subside well at ƒ/4, and all sorts of but vanish at ƒ/5.6. Performance at ƒ/8 is much more or less exactly like ƒ/5.6 (though in accordance with the figures, simply really a little less razor-sharp). Diffraction restricting units in by ƒ/11, you cannot observe any useful effect on sharpness until ƒ/16, as well as after that, it really is nonetheless great. At ƒ/22 we commence to see some light softness over the frame.
Sigma 105 Macro
Sigma 105mm f/2.8 EX DG OS HSM Macro

The past type of the lens could end straight down so far as ƒ/45, but we noted severe softness only at that or even the ƒ/32 establishing – most likely better that Sigma simply eliminated these configurations, while they don’t supply very helpful outcomes.
Chromatic aberration is held definitely in balance with this specific lens; there was some to talk about inside sides whenever lens can be used on the full frame body (in this situation, the Canon 1Ds mk III), however it isn’t in the slightest exorbitant. Peeping at 100percent plants, you are going to note really light magenta fringing inside sides from the full-frame test photos – but it is really light without a doubt.
The Sigma 105mm is a welcome development through the past variation, using its implementation of HSM focusing. Autofocus is averagely quick and near-silent, and outcomes are overridden by simply switching the focusing ring. It took simply over an extra to endure the lens’ focusing range – as a macro lens, there is lots of focus travel. The front element doesn’t turn during focusing, making life some simpler for polarizer users.
The Sigma 105mm ƒ/2.8 EX DG OS HSM is a reasonably beefy optic, made light by its usage of synthetic elements (725g, 26 oz). It’s done with Sigma’s matte gray surface and provides a metal mount, and synthetic 62mm filter threads. The lens is mentioned as having a splash-proof design.
Sigma 105 Macro
Sigma 105mm f/2.8 EX DG OS HSM Macro
The lens is a total redesign regarding the earlier version: it today features 11 lens teams, with 16 elements, that you’re a Special Low Dispersion (SLD) lens, another is a higher refractive list SLD lens. There are now actually nine curved diaphragm blades in the place of eight right people, to boost bokeh overall performance. Focusing is through method of a floating focusing system that moves two various lens teams inside optical road. And to top all of it down, Sigma features tossed in optical stabilization, very useful for whenever you wouldn’t like to create a tripod to the area.
The lens provides several control areas of note: besides the focusing ring, there was a tiny panel on the side regarding the lens featuring a switch allow or disable autofocus, and a switch allow picture stabilization in mode 1 or mode 2, or disable it entirely. There can also be a focus restricting switch, supplying choices of 30cm – 45cm, 45cm – infinity, with no limitation (30cm – infinity).
The lens in addition provides excellent scales. There is a distance scale in feet and meters, including reproduction ratios while the lens is targeted towards its close-focusing distance. However, there are not any depth-of-field signs, nor can there be an infrared list marker.
Sigma 105 Macro
Sigma 105mm f/2.8 EX DG OS HSM Macro
Sigma’s OS (Optical Stabilization) technology functions within lens, that our examination provides 2-2.5 stops of stabilization overall performance. It tends to make a small whirring sound if it is triggered. Our testing noted some poor overall performance within system whenever combined with a shutter speed of 1/60s; otherwise, it really works as advertised.
The lens ships with a round lens hood, ribbed and coated a smooth black from the inside to lessen any flare. Sigma also contains the HA 680-01 subframe hood adapter, which will be designed for usage whenever lens can be used with (clearly) sub-frame digital cameras like the 7D. Without the adapter, the bonnet adds 2 ins into total duration of the lens – using the adapter, that increases to around 4.