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Cameras & Lenses » Camera Lenses » Canon Fit » Sigma
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The Sigma 17-50mm f2.8 EX DC OS HSM lens is an image-stabilised, fast standard zoom for digital SLR cameras with an APS-C sized sensor. The lens covers a focal length from 17mm wide angle and offers a large aperture of f/2.8 throughout the entire zoom range, making it ideal for many types of photography such as portraiture and landscapes. Alongside Sigma's Optical Stabilizer (offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible), the 17-50mm OS lens also includes a hypersonic autofocus motor, for quicker, quieter focusing. It uses two elements made from Sigma's new FLD glass, plus two glass mould and one hybrid aspherical elements, to reduce aberrations and offer excellent image quality. Super Multi-Layer Coating reduces flare and ghost, meaning the Sigma 17-50mm lens has superior peripheral brightness and provides sharp, high contrast images even at the maximum aperture. More
FLD ("F" Low Dispersion) glass elements
Two FLD ("F" Low Dispersion) glass elements, which have the performance equal to fluorite glass, compensate for color aberration. In addition, two glass mold elements and one hybrid aspherical lens give excellent correction for field curvature and astigmatism. High definition images are ensured throughout the entire zoom range.
*FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definition and high contrast images.
Sigma's own unique OS (Optical Stabilizer) technology
The lens is equipped with Sigma's own unique OS (Optical Stabilizer) function. This system allows the photographer to use shutter speeds approximately 4 stops slower.
*Sony and Pentax mounts are not incorporated with OS function.
*For Pentax mount, if the camera body does not support HSM, auto focus will not be available.
F2.8 Large aperture throughout the entire zoom range
The large aperture provides a bright viewfinder image, helping the photographer confirm accurate focusing. It is also ideal for emphasizing the subject by creating a natural, blurred background and allowing the use of fast shutter speeds.
Covering a wide range of focal lengths from 17mm
This lens covers a wide range of focal lengths from 17mm and has an equivalent angle of view of a 25.5-75mm with a 35mm SLR camera. It is ideal for portraits, landscapes and general photography.
*The angle of view varies depending on which camera the lens is mounted on.
The lens has a compact construction with a diameter of 83.5mm, overall length of 91.8mm and weight of 565g. This compact and lightweight construction makes it ideal for travel photography.
Super Multi-Layer Coating
The Super Multi-Layer Coating reduces flare and ghosting as well as providing sharp and high contrast images throughout the entire zoom range.
Superior peripheral brightness
This lens has superior peripheral brightness and provides sharp and high contrast images even at the maximum apertures.
Fast and quiet AF Hyper Sonic Motor
The lens incorporates HSM (Hyper Sonic motor), ensuring fast and quiet AF.
*For Pentax mount, if the camera body does not support HSM, auto focus will not be available.
Close focusing capability
This lens has a minimum focusing distance of 28cm throughout the entire zoom range and a maximum magnification ratio of 1:5.
This lens has rounded 7 blade diaphragm which creates an attractive bokeh to the out of focus area of the image.
Inner focusing system
The inner focusing system eliminates front lens ration, making the lens particularly suitable for using the supplied petal-type hood and circular polarizing filters.
*Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.
Sigma’s DC lenses are designed for cameras with a cropped sensor. Do not put a Sigma DC lens on a camera with a full-frame sensor, such as the 5D Mark III. These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialised design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus.
HSM (Hyper-Sonic Motor)
This lens uses a motor driven by ultrasonic waves to provide a quiet, high speed AF.
The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.
OS (Optical Stabilizer)
This function utilises a built-in mechanism that compensates for camera shake. It dramatically expands photographic possibilities by alleviating camera movement when shooting hand held.
(based on 19 reviews)
of respondents would recommend this to a friend.
Reviewed by 19 customers
Displaying reviews 1-10
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(0 of 1 customers found this review helpful)
About Me Hobbyist/Enthusiast
Comments about Sigma 17-50mm f2.8 EX DC OS HSM - Canon Fit:
Bought this to go with my new Canon Eos 760d as an upgrade from the Canon lens 18-55mm that came with my previous camera. I haven't been able to test it thoroughly yet but already the results are sharper and brighter. I can't wait to try it out properly and I don't think i will regret the upgrade.
Bottom Line Yes, I would recommend this to a friend
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(2 of 2 customers found this review helpful)
What a Lens
This lens is a good upgrade from standard Lens, not the quality of a L series but not far behind and a lot cheaper.I have used this for Sea scapes, insects and flowers and I am very happy with the results, also for paddock shots of cars at race meetings.It's a good looking lens and is quite light in weight and very quick to focus. Good lens hood that doesn't fall off, as some owners complain of.I have no negative views on this lens,would buy again if needed.
I would definitely record this lens
from Porthmadog North Wales
I bought this to go with the Canon 70D body only I recently bought. No regrets about buying it: no comparing it to standard kit lens
Images shared by Jeff
Tags: Using Product
Great value and quality lens
About Me Professional
Really impressed with the quality from this lens. Always a risk not going for the most expensive equipment, but is perfect for studio portraiture and weddings.
Excellent fast lens for a cropped sensor
By Richard Mckeown
from Mid Ulster
About Me Semi-Professional
Excellent fast lens for a cropped sensor canon 50d, this is a change from my previous 18-50mm sigma 2.8 non image stabilised , it starts at 17mm now and has OS ( image stabilisation ) great lens except that the lens hood on the new one is very plasticy and cheap feeling compared to the one i got previously with the 18-50, otherwise a great leans and excellent value for money
With the exception of slightly noisier focusing, this is a good little lens.
Great little, Big lens
from North East
So glad i got this, over the canon equivalent and saved some cash as well
Images shared by Toeknee
Don't tell the Grouse
Goodwood Revival 2014
(1 of 1 customers found this review helpful)
Fantastic pictures from a great lens
About Me Casual user
Since upgrading both my kit lenses I have found composing pictures a lot easier. This lens with its f2.8 aperture produces fantastic pictures, whether as a macro lens, portrait lens or for fast action shots. Everything feels better quality from the standard canon kit lenses. It may be heavier but the extra weight is well worth it for the results.The auto focus is now very fast, and very quiet, meaning that the camera focuses a lot quicker than before. I have been so impressed that I now plan to buy a bigger 70-200mm zoom lens from Sigma when I can save the funds.
(8 of 8 customers found this review helpful)
A versatile lens
I bought my Canon EOS 7D as a body-only, eschewing the standard kit lens for my own collection of glass. For a long time, the lens that was almost permanently glued to the camera was a 35mm f/2 prime, with a 28-300mm as a typical walkabout alternative.Just occasionally, though, I felt I needed something that had a better wide angle and small amount of zoom and a constant f/2.8 or better, for those times when the other combination just got in the way. I'd been comparing the offerings of various manufacturers, but I'm a Sigma fan. Their lenses are always well-built and stand up to my ham-fistedness well. I also like the fact they ship with carry cases and lens hoods as standard. While I'd love to buy a Canon equivalent, my pockets are not that deep.The Sigma 17-50mm is superb. It's heavy, but built like the proverbial tank. The filter ring is 77mm, so I need to get a new polarising filter! Auto focus is fast and silent. Manual focus is quite easy, with only a small amount of movement between the extremes. The zoom action is smooth, with the lens barrel extending about a third as much again at full zoom. The zoom doesn't suffer from creep, so it will effectively hold a focal length under most circumstances. There is a zoom lock to prevent creep when carrying the camera about, but this only works at the wide angle.There is optical stabilisation, which does work remarkably well. I tend not to use it in most situations, but it's nice to know it's there if I need it. On my first trip out with the lens, I tried the OS on a handheld shot which I would have been hard pushed to get without a tripod any other time. I never regret choosing Sigma lenses, and this f/2.8 17-50mm continues to impress me.
By Holly Bea
Great lens, bought it for a trip to Iceland and it produced some brilliant results with my canon 600d. Very fast focus but the hood is rubbish, falls off easily and is very plasticky!
Included Accessories: Petal-type hood, Lens case
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