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Sigma 18-50mm f/2.8 EX DC SLD ELD Aspherical Macro Lens for Canon Digital SLR Cameras

3.0 out of 5 stars 33 customer reviews
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  • Large aperture of f2.8 throughout the entire zoom range
  • Minimum focusing distance of 8" & a maximum magnification factor of 1 to 3
  • Aspherical lenses offer compact and lightweight construction
  • SLD and ELD glasses offer excellent correction of color aberrations
  • Designed to fit Canon digital SLR cameras
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Product Description

Product Description

The characteristics of digital SLR cameras were taken into consideration when designing the lens power layout. The new advanced lens design corrects various aberrations. This lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras. This lens is specially coated to get the best color balance whilst cutting down flare and ghost caused by reflections from the digital image sensor and lens. It has excellent correction for vignetting and superior peripheral brightness is ensured. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations. The design produces a compact and lightweight, yet robust, construction with an overall length of 84.1mm (3.3in.) and maximum diameter of 74.1mm (2.9in.) and weight of 445g (15.6oz). This lens has a minimum focusing distance of 11 inches (28 cm.). It is equipped with inner focusing system. The non-rotating front lens element makes the lens suitable for using its petal-type lens hood and circular polarizing filters. Minimum Aperture - F22 Lens Construction - 15 Elements in 13 Groups Number of Diaphragm Blades - 7pcs Minimum Focusing Distance - 11inches (28 cm.) Filter Size - 72mm Lens Hood - Petal-type hood Dimensions - Diameter 74.1mm (2.9 in.)X Length 84.1mm (3.3in.) Weight - 445gr/15.6ounces

From the Manufacturer

The Sigma Corporation is pleased to announce the launch of the 18-50mm F2.8 EX DC MACRO lens. This lens has a large aperture of F2.8 throughout the entire zoom range, a minimum focusing distance of 7.9-inches and a maximum magnification of 1:3, making it ideal for close-up photography. Specially designed to suit the characteristics of digital SLR cameras this lens provides a high level of optical performance.Its design incorporates both glass-mold and hybrid aspherical lens technology which offers superior peripheral brightness, extremely high image quality as well as a compact and lightweight construction.

Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. The super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. High image quality is assured throughout the entire zoom range. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.

EX Lens
The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.

DC Lens
These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialized design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus ! including compact and lightweight construction.

Product Information

Product Dimensions 3.4 x 3.1 x 3.1 inches
Item Weight 1 pounds
Shipping Weight 1.8 pounds
ASIN B000JDJJ82
Item model number 581101
Customer Reviews
3.0 out of 5 stars 33 customer reviews

3.0 out of 5 stars
Best Sellers Rank #2,119 in Camera & Photo > Lenses > Camera Lenses > Digital Camera Lenses
#85,321 in Camera & Photo > Camera & Photo Accessories
Date first available at Amazon.com October 4, 2006

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Product Warranty: For warranty information about this product, please click here

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Customer Reviews

Top Customer Reviews

4.0 out of 5 starsVersus Tamron 17-50, Canon 17-55 [is], Canon 17-85[is], Canon 18-55[is]
By 007Peter on February 5, 2009
I own the best Canon 17-55 F/2.8, but it is also heavy and expensive for risky environments like windy beaches to packed clubhouses. I need an affordable F/2.8 backup, so I bought this Sigma 18-50mm F/2.8 Macro. Having read many account of sigma lens front/back focusing, I have a very low expectation for my lens. Luckily, my fear proves to be unfounded, as my 18-50mm f/2.8 macro is free from rear/front focusing.

[ Biggest Surprise ] = Fast + Silent + Reliable focusing. Even without HSM/USM motor, the AF speed is fast & comparable to my canon 17-55 f/2.8 usm in dim light. Under the same setting, my tamron 17-50 f/2.8's banshee-like micro-motor scream loudly yet failed to find focus after 1 minutes.
+ The build quality is near "L", better than my expensive Canon 17-55 f/2.8 IS
+ Size is very small compare to my gigantic canon 17-55 f/2.8 IS
+ Fantastic MACRO lens on the run

[Disappointment] 18mm F/2.8 "wide open" is softer than Tamron 17-50mm.
- Canon 17-55 f/2.8 @f/2.8 is sharper than sigma 18mm @f/5.6 (no joke!)
- Field of view is closer to 18.5mm or 19mm.

Since I had previously own the tamron 17-50 f/2.8, a canon 17-85is, and a canon 18-55is, here how they compare against one another:

...................................................[ Landscape Sharpness ]

[1] Canon 17-55 f/2.8 IS__amazing sharpess even @f/2.8 wide open
[2] Canon 18-55 IS ______ sharp corners, mild barrel distortion + ca
[3] Tamron 17-50 f/2.8____sharp "when focused", problematic AF, field curvature
[4] Sigma 18-50 f/2.8_____softer wide open than tamron, 18mm behave like 19mm
[5] Canon 17-85 IS_______strong C_A + barrel distortion, soft corners

...................................................Read more ›
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5.0 out of 5 starsA versatile lens for a great price
By J. Kim on April 18, 2007
Verified Purchase
Just another vote of confidence for this lens. (I posted this same review at another online retailer, but since I bought it from Amazon, I decided to post it here, too.)

After learning to love prime lenses, it was time to replace the underwhelming kit lens of my Rebel XT with better quality glass. I looked long and hard for a fast zoom that covered the wide-to-medium range despite the XT's crop factor, and finally settled on the Sigma.

Although I haven't laid my hands on the competition (including a similar 17-55mm f2.8 EF-S from Canon for more than *twice* as much, and the slower 17-40mm f4L), I don't regret my purchase at all. I was a bit wary at first about buying a non-Canon lens, especially after reading a few complaints online about bad samples, but the lens turned out to be just fine.

Edge-to-edge sharpness looks great to me, even wide open, and vignetting doesn't seem to be a problem. I'm not a professional, and don't own any L-series glass, but this is far more than I expected for the price.

The macro ability is also a nice bonus, as is the lens hood and case included in the package. I wouldn't call the lens "lightweight" (since I still prefer small primes when I don't need the versatility), but it's still a reasonable fit on the diminutive XT body.

I'm not crazy about the slight sparkle in the powder coat, but hey, that's hardly a complaint. All in all, I couldn't be happier!

Update: Four years later, I've upgraded to a Rebel T2i, and this is still one of my most trusted, go-to lenses!
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5.0 out of 5 starsTerrific, versatile lens
By Nathan on April 19, 2007
Verified Purchase
At ~$600 less than the comparable Canon model, this lens is tough to beat! After several hundred shots, it's a keeper for me. I debated between this zoom range and 24-70mm, but found that 24mm was just not wide enough for my 1.6x crop Rebel XT, especially for crowded rooms and landscapes. 50mm (80mm FF equivalent) has been fine for most portraits and that zoom combined with large aperature produces nice bokeh. F2.8 makes it terrific for existing light use, though I do still find my 430EX flash necessary sometimes. I find the lens to have good sharpness at f2.8 throughout the zoom range, and at f4.0 and above it's very sharp. Colors are great. I have had no trouble with flare, or fringing, though I haven't pushed it hard in this respect. Sigma seems to have corrected the flare and CA issues with the first version of this lens. Though it's not a true 1:1 macro, I have found the macro function very useful and lots of fun. That said, the extremely small depth of field with f2.8 and macro has exposed my need for a good tripod! Build quality seems to be very good; zoom and focus are well damped. Autofocus seems accurate to me while being fast and quiet. Highly recommended.

[...]
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2.0 out of 5 starsBe wary of quality control
By J. Mackey on December 1, 2007
I went through two copies of this lens. The first copy had a front-focus problem approaching 20mm. I sent sample shots to Sigma, and they directed me to simply return the lens to Amazon rather than have it serviced. So, I exchanged it (big points to Amazon for making that so easy!), and the second copy front-focussed by approximately 8mm. That's not nearly as bad, of course, but for close-up photography, it meant few keepers. (I bought this lens for the macro capabilities, as I intended to use it in restaurants, taking pictures of my plate without moving away from the table.) The focus problem was in both my Canon XTi and my Canon 40D. None of my Canon lenses have any focus problems whatsoever; this issue was limited to the Sigma lens.

I sent the lens to Sigma for service, and three weeks later, received my lens back in even worse condition than it started. It still front-focusses by 8mm, and now, even what is "in focus" is much softer than before. I contacted Sigma repeatedly to ask them what I should do, and they ignored my emails.

I have seen many good shots from this lens from people who had good copies. When I shot at f/5.6 or above, I would catch my intended focus point (since the depth of field was increased), but that made shots in lower-light too blurry due to the slower shutter speeds.

This lens can be very good -- if you get a good copy from the start. If you read comments on the photography forums, you'll see story after story of quality control problems from Sigma, and the need for repeated service attempts before a lens will be correctly calibrated.Read more ›
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Most Recent Customer Reviews

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