Break through the wide-angle record and simply try Sigma 8- 16mm lens.

IT 168 always surprises us when evaluating Sigma lens. Since the release of DC HSM 10-20mm f 3.5 EX, a new lens of 8- 16mm F4.5-5.6 DC HSM has been creatively introduced, and the focal length has been changed to 12-24 mm, which has once again set a record for super wide-angle lenses and provided/kloc-for APS-C frame fuselage.

▲ Sigma 8- 16mm F4.5-5.6 DC HSM

Compared with the previous Sigma 10-20mm4-5.6 ex DC HSM, the weight of this super wide-angle lens is slightly heavier, reaching 555g (Sigma10-20mm weighs 470g). The convex lens at the front feels a bit like a fisheye lens, with a fixed hood. Although the lens cover can be divided into a front cover and a cylindrical part, it needs to be completely removed when shooting, so the filter cannot be installed. The recent shooting distance of this lens is 24 cm, which is the same as Sigma 10-20mm DC, and the maximum magnification is 1:7.8. Because of the built-in ultrasonic motor, the focal length is short and the focusing speed is very bright.

▲ The hood is fixed in front of the lens.

About Sigma 8- 16mm F4.5-5.6 DC HSM:

In terms of optical structure, Sigma 8- 16mm F4.5-5.6 DC HSM adopts 1 1 group 15 lens, including up to 4 FLD (according to Sigma, the effect of FLD is the same as that of fluorite lens) and 2 glass aspheric lenses,/kloc-0. At the same time, the lens is also equipped with Sigma HSM ultrasonic motor, which not only focuses quickly, but also is very quiet.

▲ Canon 550D is equipped with Sigma 8- 16mm F4.5-5.6 DC HSM.

In other respects, the closest focusing distance of 8- 16mm F4.5-5.6 DC HSM is 24cm, and the maximum photographic magnification is 1: 7.8. It directly provides an integrated hood and cannot be equipped with a filter, but its volume is 75? 105.7mm (diameter? Long), weighing 555g.

Contrast samples of ultra-wide-angle lens at different gears

Next, Canon 550D is used to compare the shooting of the same scene with Sigma 8- 16mm DC and the original EF-S 10-22mm F3.5-4.5USM, which can compare the differences between the super wide angle 8mm and 10mm in viewing angle and telephoto distance.

1/500s, f/4.5, ISO:1008mm (Sigma 8-16mm).

1160s, f/8, ISO:1008mm (Sigma 8-16mm)

1/640s, f/3.5, ISO:10010mm (ef-s10-22mm).

1125s, f/8, iso:10010mm (ef-s10-22mm).

1/250s, f/5.6, ISO:10016mm (Sigma 8-16mm).

1125s, f/8, ISO:10016mm (Sigma 8-16mm).

1/400s, f/4.5, ISO: 100 22 mm (EF-S 10-22 mm)

1125s, f/8, ISO: 100 22 mm (EF-S 10-22 mm)

From the collocation point of view, Sigma 8- 16mm has a wider viewing angle at the wide-angle end, but it also sacrifices the telephoto focal length. On the other hand, in terms of lens combination, we can consider connecting Sigma 8- 16mm DC to Sigma 16-50mm F2.8 EX DC OS HSM, so that the focal lengths will not overlap, which should be a cost-effective combination for beginners.

Description and summary: exaggerated perspective needs to pay attention to dark corners.

From the sample, we can see that Sigma 8- 16mm lens has obvious advantages in viewing angle, but the sharpness is slightly average compared with the original lens, and the situation has improved after the aperture is adjusted to F8. In terms of color performance, this super wide-angle lens is commendable whether it is blue or red, but the resolution is still slightly insufficient.

▲ 1/250s，f/8，ISO: 100 8mm

For super wide-angle lens, the distortion and chromatic aberration of the picture are more difficult, which is also the main factor to consider the excellent lens. Sigma 8- 16mm is built with four newly developed FLD lenses with high transmittance and low dispersion and aspheric lens group, which makes the distortion well controlled and the chromatic aberration correction effect good. However, there are still dark corners, which is also a small problem with Sima lens.

▲ 1/250s，f/5.6，ISO: 100 8mm

Considering from the market, the price of this lens is a little higher than that of Sigma 10-20mf4-5.6Ex DC HSM. Although it provides a broader perspective, it has little impact on non-professional users.