The Sigma 17-lxx f2.viii-4 DC Macro Bone HSM C Canon is a “standard” zoom lens for APS-C cameras, in this instance Canon. It is also bachelor for Nikon and Sigma APS-C bodies. It covers the range 17mm to 70mm, the relative focal length for total frame 35mm would exist 27.2mm to 112mm. This type of lens is aimed at photographers looking for a single, all purpose lens that will at the same time be compact enough to acquit around. This detail lens is also equipped with a Macro setting allowing focussing down to 22cm giving a reproduction ratio of i:2.nine.
The blueprint is of 16 elements in 14 groups, two of the elements are FLD (with characteristics similar to flourite glass) and one is SLD (Special Depression Dispersion glass). It is optimised for use with digital capture, as one would expect for an APS-C lens and is equipped with optical stabilisation (Os), a hyper-sonic motor (HSM) for autofocus and a 7 bladed iris giving a round aperture. The bore is 79mm, the length 82mm and the weight is 470g Sigma has recently introduced categories for its lenses, A for Fine art lenses, Due south for Sport lenses and C for Gimmicky lenses.
This 17-lxx is the showtime offer in the Contemporary category, the design characteristics of which are ‘Superior optical functioning and compactness”. The construction of the lens includes “Thermally Stable Composite” (TSC) textile for increased durability and reduction in weight. Sigma does not explain exactly what this material is just it has the benefits of polycarbonate components, only avoids their thermal expansion.
The Sigma 17-70mm has a DxO Mark Score of xv. This makes information technology the 5th
best APS-C zoom lens tested on the Canon EOS 7D. Nonetheless if you lot wait at the scores in detail, for sharpness it ranks number 3, alee of any canon APS-C lens. This does exclude all of the immensely proficient lenses designed to embrace full frame 35mm only they generally have a price tag to match the larger format. The score of 15 overall and of 9 P-Mpix for sharpness makes this a very serious contender. Distortion and vignetting at 0.4% and 0.7EV are at the lower end of the range of scores in this group, transmission differs from the stated value by just under 0.5EV which is on a par with other lenses of this type and chromatic aberration is well controlled, better than most.
Sigma 17-seventy f2.eight-4 DC Macro Os HSM C Canon vs Canon EF-Southward 17-85 f4-5.6 IS USM vs Tamron 17-50 f2.viii Di II XR VC Asph IF Canon.
Here are three possible candidates for “standard” zoom:
- The Catechism is the cheapest of this group and the Tamron the costliest.
- The Tamron too has the shortest zoom range, just nether 3x while the Sigma has 4.11x and the Canon 5x.
- The Tamron has the widest aperture, fixed at f2.eight throughout the range, which for lower light working will be a big bonus.
On the face up of Sharpness the Tamron looks proficient: 10P-Mpix is just college than the Sigma.
Both the independent lenses beat the Canon which scores but 7P-Mpix.
Tamron lens does do very well, but information technology is far less consistant: at its best it just beats the other two simply broad open up it has to exist at 50mm to win and stopped down it really falls apart.
The Sigma on the other manus maintains a like result throughout the range of focal lengths and does better at retaining quality stopped down.
The DxOMark choice:
The first point is that the
is not equally adept. It’s slower by a full stop over the Sigma and information technology lacks the sharpness of the other two.
will probably produce the nicest results at its optimum aperture and focal length but the Sigma will come shut and just beats the Tamron overall.
is cheaper, lighter by 100g, zooms out to 70mm instead of 50mm and offers a greater degree of magnification for Macro: 1:2.9 against the Tamron’s ane:4.8.
Sigma 17-70 f2.eight-4 DC Macro Os HSM C Canon vs Sigma 17-70 f2.8-4 DC Macro OS HSM Canon vs Sigma 17-70 DC Macro Canon
It is good to run into when companies introduce an updated version of an existing product and it shows a real improvement. Sigma has had a 17-70mm macro zoom lens in its range since 2006. Initially it had no prototype stabilisation and the AF was non Hyper-Sonic, but physically information technology looked very like the new version. Version two had the IS and HSM only was quite a bit heavier. The progress in quality has been good, P-Mpix has risen by i point each time and the overall score has climbed ii betoken each fourth dimension. The original version had less distortion than the subsequent models merely the distortion is really not a serious issue with this lens anyway.
The newest on the left followed past the original in the centre and the 2d version to the correct. Sharpness has improved each time
Sigma 17-70 f2.8-four DC Macro Bone HSM C Canon vs Canon EF-S 17-55 f2.8 IS USM vs Nikon AF-S DX Zoom-Nikkor 17-55 f2.8G IF-ED
A last cursory comparison with the Flagship ‘standard’ APS-C zoom lenses from Nikon and Canon, admittedly these are really marketed to a different sector merely the figures are quite sobering. Both companies produce f2.8 lenses with a 17-55mm range, both have a price tag twice that of the Sigma, both are much heavier and larger (quite understandably given their faster discontinuity). However the Sigma from a quality point of view is as good as the Canon and better than the Nikkor. If it is non essential to have the fixed f2.8 aperture and then the Sigma lens is actually the best value here.
This chart showing chromatic aberration shows that the Sigma is just as skillful as the much costlier Canon and both are improve than the Nikkor.
At some bespeak or another nearly every photographer is going to own a ‘standard’ zoom lens. If their photographic camera has an APS-C sensor then information technology is going to exist something similar a 17 or 18mm to 55 or 85mm. This Sigma 17-70mm is right in the eye of this range, but that is the only place where information technology is in the middle. In all other respects information technology is among the forepart runners. Of its type the Sigma 17-lxx f2.8-four DC Macro OS HSM C Canon is well priced, well specified and a good performer.