Sigma 17-50mm f/2.8 EX DC OS HSM
Sigma 17-50mm f/2.8 EX DC OS HSM


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I find a lens with this size and weight to be easy to take with you, comfortable to use and to have enough mass to be stable. I have not tested this on Canon, which would not be able to correct it without a lens profile, which does not exist. To comparison test outdoors, a clear day is the first requirement. The focus and zoom rings are very smooth with no play. So, I think at last my search for a macro lens has come to an end The focal length of this lens is equivalent to approx. Zoom Lock Mechanism The Zoom Lock prevents unwanted barrel extension when carrying the lens/camera combination. Right side sharpness is very good, but left side sharpness is very bad. I've had many shots misautofocused for no apparent reason - especially in AI Servo mode. The Sigma center-and-side-pinch lens cap is very nice and is easy to install or remove with the hood in place. This aperture difference can translate into a big difference in your image quality. For many, their first general purpose lens is the one available in-the-box with their first DSLR. There is also the risk of a problem that results in the lens and body manufacturers directing blame at each other To compare the two I give a slight edge to the Nikon for image quality and build quality but I'm not going to knock the Sigma at all. Watch for shadows from your built-in flash at wider settings. Both are shown along with the Sigma in the above and below pictures. I have not been a big fan of Sigma's matte finish - especially because it readily shows fingerprints and dust.

Sigma 17-50mm f/2.8 OS HSM lens review (with samples.

Amateurs waste too much time worrying about lens sharpness, and since this lens is designed for amateurs, it's super sharp. Same thing, slightly out of focus in the other direction. In the real world, this lens is too darn heavy for what it is - and it looks long enough to be a telephoto, marking you as a pervert in public. There is no problem with vignetting, even with thick filters. Some people think this lens produces warm/yellow results, but I am not noticing this. The Tamron focuses much more accurately - My keeper rate is far higher with the Tamron. The focus ring is nicely sized and in the position I prefer - as the front-most ring. You expect to get what you ordered and you want to pay a low price for it. Apparently a microchip replacement in the early lenses resolved this problem. When I invest in pro lenses from Canon, LEICA and Nikon, I know they'll still be performing decades from now. I saw no coma with this aspherical lens! Whoo hoo; coma has always been the weak point of fast wide zoom lenses, and Sigma made it go away. Build and Design This lens fits right in line with the new sleek, modern, streamlined look of Sigma’s recent lens offerings. As this page is copyrighted and formally registered, it is unlawful to make copies, especially in the form of printouts for personal use Being sized for a smaller-format sensor allows a smaller and less expensive design to be used. No Nikon or Canon camera will be able to correct this automatically, as many of these cameras can do for their own-brand lenses today. However, that is not the end of the close-up story. On the right side, the Sigma is at least as good until the mid focal lengths are reached. Here is an example of what this focal length range looks like.

Look at the reflections from the front element and you'll see just how wildly aspherical it is. The footage scale is illegible; it's tiny and in dark gray. At least on the Nikon version I tried, Sigma finally has this figured out. Buy this lens to use today, but after the warranty expires, good luck. I would also leave the hood in the box for resale time. In real world use, I missed a noticeably higher number of shots than I should have. Here is a visual look at some of the above-referenced lenses. After a long, cold winter, the bright new growth on the trees was looking gorgeous to me. Sigma includes a nice padded case and a lens hood with this lens. If there is any subject movement, the max aperture available on these lenses is not wide enough to allow the action to be stopped - resulting in motion-blurred images. Nikons need no lens data to correct this; they can correct any random lens. The Tamron focuses faster but the Sigma focuses more quietly. Uncoated filters are much easier to clean, but more prone to ghosting. With a solid feel and sleek, clean design, this lens from Sigma is quite impressive both in terms of image quality and quality of the user experience. It is sharp in focus and has beautiful, creamy bokeh. Specific image content aside, I think that you will be able to discern a reasonable difference between the lenses in this example. In addition, suitable positioning of two hybrid aspherical elements serves to maintain imaging performance and to shorten and compress the entire optical system. This is an internal-focusing lens - It does not change length during focusing and the front element does not rotate. The good news is that only the edges of the zoom and focus rings retain the conventional Sigma finish. Sometimes a lens can be made compatible by the manufacturer, sometimes not. Sharpness is very impressive, it's sharp everywhere. The relatively small lens hood is large enough to help keep fingers and other objects from touching the front element.

Sigma-Aldrich: Analytical, Biology, Chemistry & Materials.

It's also usually covered by the plastic window, so I hope you prefer the meters scale, which is a little better. The biggest help is when you use any of these links when you get regardless of the country in which you live. A zoom lock switch is provided but not needed with my copy of this lens as the zoom ring requires a firm force to twist. The Sigma's requires its lens hood to be removed to install/remove the lens cap. The focus ring moves quickly, smoothly and effortlessly in both autofocus and manual focusing modes. Bokeh, the character of out of focus backgrounds, is pretty good. The Canon and Sigma are similarly sharp in the center at all focal lengths. It features a very solid, very high quality build that feels like solid metal construction, even though the lens is made primarily of a very hard specialized plastic.

Sigma 17-50mm f/2.8 EX DC OS HSM Lens Review

MFD testing uses manual focusing - and this lens indeed manually focuses closer than it will autofocus.     DC: Won't work on full-frame; only works on APS-C format cameras. It has no affect on image quality or functionality. I support my growing family through this website, as crazy as it might seem. There is only one caveat: the effective focal length becomes significantly shorter with closer subjects. And, these figures are good enough for many close subject needs.

17-50mm f/2.8 Sigma Lens Review by Thom Hogan

Canon EF 50mm f/1.4 USM Standard. The other two switches - AF/M and OS On/Off are noticeably raised from the lens barrel. If you've gotten your gear through one of my links or helped otherwise, you're family. In lenses that have it, coma goes away as stopped down.

17-50mm F2.8 EX DC (OS)* HSM | Sigma Corporation of America

The Sigma rings rotate the Canon direction, the Tamron rings rotate the opposite direction but with less effort. The zoom ring has an ideal amount of resistance while, as I indicated earlier in the review, the focus ring is slightly too easy to rotate. Most of us need at least one general purpose lens - and the focal length range is usually my primary qualification for such a lens. The same lenses are pictured fully extended below and with hoods later in the review. These aren't facts or specifications, they are the results of my research that requires hours of photography and calculations on the resulting data. Focus accuracy has been the biggest issue I've encountered with this lens. This is an optically great lens, but there is far more to a great photo than a sharp lens. I hope one day that changes, but I honestly don’t see that happening It helps me keep adding to this free website when you get yours through these links - but I receive for my efforts if you buy elsewhere. Price is a huge difference between these two lenses. The lens is coated with Sigma’s Super Multi-Layer Coating to reduce flare and ghosting, and I found that the images had good contrast coming straight out of the camera. There is very little play in the extending portion of the barrel. Even though the diaphragm is round at large apertures, sunstars are quite good at moderate to small apertures. It costs you nothing, and is this site's, and thus my family's, biggest source of support. If you read the discussion on the comparison page, skip down to the "mounts" paragraph.

Sigma Reviews -

Manual Focus Override Manual focus override works great, at least on the Nikon version I tried. and in other situations where holding a camera steady is difficult and a tripod is not being used. Very round at large apertures, while still giving great sunstars stopped down. As you can see in this photo, points of light stay as points. My standard disclaimer: You should be aware that there are potential issues with third party lenses. Some chromatic aberration is noticeable in the corners in the wider half of the focal length range. The color rendition seems about the same as my Nikkor AF lenses. The other lenses are similar in their distortion amounts. Additionally, a broader photographic expression through the use of faster shutter speeds as a result of the maximum aperture offers enhanced photographic pleasure. I've actually preferred the warmer image in the majority of comparisons I've noticed this difference in. If you thing you want one of these, you'll love it. A printed-on-the-MF-ring focus distance scale is provided - and reveals the lack of FTM. You can get the Sigma cap on and off with the lens hood in place, but unless you have long, strong fingernails, it is easier to remove the hood first. But they continue to tell me that the lens will not be available in Sony or Pentax. It's a good lens albeit heavy thanks to the HSM motor and it has OS as well. New cameras may or may not work with this lens, and off-brand lens makers only sometimes will update lenses to work on new model cameras. Leave them in the box for resale, and buy the real Nikon or Canon caps to use with this lens instead. Enhanced Peripheral Illumination Peripheral light fall-off is minimized when compared with that of conventional lenses for film cameras, so images are uniformly bright from the center to the periphery. Neewer Replacement Battery Charger. With light being least redirected in the center of their image circles, most lenses perform best in the center of the frame. Depth of field has much more to do with focal length than f/stop. Manual focus is swell, just grab the ring at any time. It, of course, lacks image stabilization - another big advantage in my opinion. MSD Premium Apple iPhone 7 Aluminum. What you get is what you get unless you want to much with it in Photoshop. My standard disclaimer: There are some potential issues with third party lenses

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