Fine Super Wide - Super price / performance ratio

I usually only in Niko house's own lens area on the road, but in view of the much more expensive Nikon lens, which in addition provides even less angle, though, so I have nevertheless decided with constant light intensity me because of the much lower price of the Sigma. Because of the price, but also due to the fact that I've seen in various photo forums numerous photographs that have been taken with this photo, and that convinced me regarding image quality.

Basically, you have to keep in mind that this is to be a so-called. Super wide-angle zoom, which is obviously much more difficult to korregieren just in terms Verzeichnug and vignetting, a standard zoom or while blow as a "normal" Wide Zoom, without the cost of production.

The lens comes in a well-padded quiver with zipper, which consists of a water-repellent material and the bottom and lid foam is inserted so that the lens is well fixed. A backlight / sun visor is also included as warranty card, and product description.

Statements of Vorrezensenten that the lens would be made entirely of plastic, I can not understand. The lens comes in extremely high quality production and is very well partly made of metal, which one not only feels to the touch, but also when picked up. I'm just as regards the "attack" of a lens, very demanding. For me personally the beginner lenses manufacturers are an abomination because it actually often plastics are pure with exceptions of the lenses, the Sigma makes this no way to.

The setting rings have no game, the Brennweiteneinstellring is neither too loose nor too strict, yet he has resistances, but glides pleasantly from 10 mm to 20 mm.
Absolutely fascinating the focus ring which conveys analog feel. With a wide-angle zoom and in times of AF, although negligible, yet an amazing feature.
I particularly like also the fact that the lens when adjusting the focal length of its length only marginal changes and aesthetics, if you allow me the use of this term in the same breath as a lens, is maintained. Because there is no tube, the drives at once from inside the look and the whole thing can be a long drawn, unsightly part. * Grins *

The inner focusing causes the front lens remains stationary, both when changing the focal length, and when focusing. Especially when using filters or intentions as practicable. If you have just a polarizing filter adjusted to suit, for example, but then again changes the focal length, so "twisted" the polarizing filter will not again.

The imaging performance at full aperture can be described at all focal areas as good to very good, even at the edges. Stopped down to f 8 increases the sharpness again sharply. The lens has at least one aspherical lens, which is reflected in the image quality according to how one can see from the photographs.

The vignetting considers himself at maximum aperture astonishingly limited and is never distracting, can of course be corrected in retrospect very easy entirely by software.
This is important to note that the objective of the so-called. "DC" system lenses from Sigma counts, not for full-format cameras (24x36 mm sensor or analog) and digital cameras with a sensor is designed larger APS-C. Used to the objective of such cameras yet, would be strong vignetting and sacrificing imaging performance result.

However, I am absolutely delighted by this objective with regard to the distortion. Even at 10 mm, this is minimal. It goes without saying that you need to align the lens when shooting according to the subject carefully, otherwise by the strong emphasis of the foreground straight lines "tip", which is erroneously often confused by some with distortion. From distortion occurs when a straight line is shown bent at the edge of the picture. Not to be confused with the aforementioned perspective distortion which is all Superweit- and wide-angle lenses in common.

My Nikkor VR 18-200 has a clearly visible barrel distortion at 18mm. The Sigma 10-20 is even at 10 mm not nearly as much distortion, but also slightly barrel-shaped. However, one should therefore from 18-200er think not bad, after all, it is a difference if you have a dual korregieren Zoom or Elffachzoom. Conclusion is that the 18-200er Architecture shooting using the wide angle is limited, which is Sigma 10-20er used without hesitation.

The ultrasonic motor is quick and quiet, but a track louder than that of the Nikon lenses 18-200 and 18-70, but the noise never her "disturbing".

The two only negative features of the Sigma lens are:
The lens cover and the back cover! The front cover does not last particularly well when mounted and the rear cover to screw over fiddly.

Both will soon be exchanged for the original Niko parts. I do not understand how to build such a great lenses, but can mess with the covers so. * Laughs and shakes his head *

The lens itself, however ... five star! Thank Sigma.

PS: To what extent it within the lens series are variations, of course I can not say serial variations usually affect mainly imaging performance, less the mechanical quality.