Sigma 17-50mm f/2.8 AF OS HSM EX DC
 | Outdated Product The Sigma AF 17-50mm zoom lens is designed primarily for those who need wide to medium shooting angles: its focal length range is 17-50mm. Designed for APC sensor and can be used with Canon, Nikon, Pentax, Sigma and Sony systems. Design features include an image stabilizer and ultrasonic AF drive. |
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Sigma 17-50mm f/2.8 AF OS HSM EX DC | |||||||||||||||||||||||||||||||||||||
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The Sigma AF 17-50mm zoom lens is designed primarily for those who need wide to medium shooting angles: its focal length range is 17-50mm. Designed for APC sensor and can be used with Canon, Nikon, Pentax, Sigma and Sony systems. Design features include an image stabilizer and ultrasonic AF drive.
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I wanted to buy it from M-video. I checked all the copies that were in the store. They all required adjustment, but perhaps there were more serious problems, I didn’t check. In short, there’s nothing to take. I was told that every fourth sigma defect we have, but it turned out that every first one. Perhaps it was just luck me, but in general it seems that they are selling one ... ohm. And at the same time, we are very glad that there are FOOLS to whom we can foist it. Not found Not found  Arkadiy: just bought Sigma 17-50mm f/2.8 AF OS HSM EX DC |
An excellent zoom for every day. Brightness, build quality, price. I had no choice, but my unit has no problems with front and back focus. Even at 2.8 it focuses excellently. The native Canon kit with STM focuses slightly faster and quieter, but their accuracy is the same. The brightness is excellent, and it blurs the background beautifully. Universal focal lengths. Analyzing my collection from a point-and-shoot - superzoom, I concluded that 95% of the photos fall within these focal lengths. For video, it's convenient that the focus ring has a short stroke. The zooming is smooth and silent -- also a plus. Compared with the Canon 18-55/2.8 (albeit used), I didn't notice significant advantages. Even at 2.8 -- both are sharp. The Canon 2.8 is slightly sharper at the edges of the frame at 2.8, but identical in the center. At f4 -- identical. At closed (>7) apertures, the Canon turned out worse! Yes, the focusing is slightly more convenient, and the end is 5mm longer, but the price is twice as high! So this Sigma is an excellent uncompromising-compromised option :). The focus ring rotates during autofocus. It's not critical, but it's more convenient on a Canon. Focus is not full-time, meaning it's either manual or auto, and in auto mode, you can't fine-tune! This is probably the biggest downside. However, thanks to the excellent autofocus, this feature isn't in high demand :). Well, my STM kit had it, but I don't recall using it much. The included hood doesn't hold very reliably... there's no latch, and it can be easily lost, I think. The "expensive" filter diameter is 77mm, but with such an aperture, it won't be any smaller :). For video, you'll have to use manual focus only... auto is noisy, although fast. use Sigma 17-50mm f/2.8 AF OS HSM EX DC week |
Perhaps I got a good specimen, but I have no complaints about my lens in principle. The lens is a bomb in all aspects. Aperture, decent build. Not found use Sigma 17-50mm f/2.8 AF OS HSM EX DC month or more |
If you are not ready to shell out your hard-earned money for the Canon EF-S 17-55mm f/2.8 IS USM aperture zoom, there is another model on the market in the face of the Sigma AF 17-50mm f/2.8 EX DC OS HSM, which is an excellent alternative to the native lens .
Picture
In the course of testing the lens, the specialists of the photozone.de resource revealed the superiority of the Sigma representative in terms of sharpness over the analogue lens from Canon. Sigma produces a picture with pure and juicy colours without any distortion and parasitic effects. Phenomena such as chromatic aberration and vignetting can only appear at the minimum focal length paired with a fully open aperture.
Autofocus
One of the main features of the lens is the autofocus system, which has both pluses and minuses. On the one hand, automation very quickly and accurately focuses. And she does it very quietly, which is a huge plus when shooting video. On the other hand, the focus ring itself rotates within 45 ° during focus, which is why in automatic mode there is no possibility of manual focus adjustment.
Zoom
The zoom is also implemented in an interesting way — the focal length ring rotates in the opposite direction in comparison with other lenses, i.e. counterclockwise. In the process of zooming, a small “trunk” extends from the body. The front lens does not rotate, which allows the use of polarizing filters with a diameter of 77 mm.
Stabilizer
Also, an effective stabilizer has found a home on board the lens, designed to compensate for hand trembling and allowing you to win 3-4 exposure steps. That's just in the on state, it greatly eats up the battery charge.
Competitors
In terms of cost, the Sigma AF 17-50mm f / 2.8 EX DC OS HSM outperforms the original lens from Canon by one and a half to two times. In its price range, Sigma's competitor is the Tamron SP AF 17-50mm f/2.8 XR Di-II VC LD IF glass. It is about the same in optical properties, but with a much noisier stabilizer. The choice depends purely on your personal preferences.
