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Sigma 18-50mm f/2.8 EX DC SLD ELD Aspherical Macro Lens for Canon Digital SLR Cameras | 
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| Brand: Sigma
Category: Photography
List Price: $700.00
Buy New: $410.00
You Save: $290.00 (41%)
New (6) Used (1)
Avg. Customer Rating:  20 reviews
Media: Electronics
Fragile: No
Batteries Included: No
Optical Zoom: 2.8
Maximum Focal Length: 50
Minimum Focal Length: 18
Shipping Weight (lbs): 1
Dimensions (in): 3.4 x 3.1 x 3.1
MPN: B000JDJJ82
Model: B000JDJJ82
UPC: 085126581541
EAN: 0085126581541
ASIN: B000JDJJ82
Availability: Usually ships in 1-2 business days
Condition: Brand new in box with everything. Never used it because I just got it as a deal with another camera, but I already have a lens that covers this range.
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| Features:
| • | Large aperture of f2.8 throughout the entire zoom range | | • | Minimum focusing distance of 7.9 inches with a maximum magnification of 3x | | • | 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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| Editorial Reviews:
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 - 67mm Lens Hood - Petal-type hood Dimensions - Diameter 74.1mm (2.9 in.)X Length 84.1mm (3.3in.) Weight - 445gr/15.6ounces
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| Customer Reviews: Read 15 more reviews...
 AF issues, Chromatic abberations too severe June 24, 2008
1 out of 1 found this review helpful
Perhaps I was unlucky and got one of the bad ones but I found this lens completely unreliable. My first issue is the auto-focus (on canon 40D). I had more missed shots with this lens than I've ever had with any other..pretty slow AF also. I found the chromatic abberations unacceptable on a great number of shots as well. On the other hand, I took some beautiful macro shots with this lens. Particularly using live view with manual focus...fantastic. It seems that Sigma lenses are hit and miss QC wise from what I'm reading. Too bad because it really feels like a well built, quality lens. I returned mine to amazon as defective.
 Awsome wide angle for the money June 2, 2008
1 out of 1 found this review helpful
I have been using this lens for about 3 months now and it rocks.
build quality is great.
Awsome sharpness and contrast.
this lens stays on my camera 95% of the time.
I would deffinatly reccomend this lens to anyone!!
Very Nice Lens May 9, 2008
I have had this lens for nearly two years, frequently recommending it online and too friends so I thought I would take a few minutes and write up a review here. This lens is sharp, well made and comes with a nice hood and lens pouch.
The wide angle of 18 even with the 1.6x crop factor is excellent. You can get nice and close and still get your subject in the frame. This make compositions with distracting backgrounds much easier to deal with.
It is fast f/2.8 is great when you need it and again another option when you want to deal with blurring out distracting backgrounds or like the shallow depth of field look you can get with an f/2.8
When I first got my camera (Rebel XT) and lens I thought there was something wrong with the focusing or the lens or both. Turns out it just took some learning and practice with both. My point is some of these folks in the reviews and elsewhere that talk about focusing issues, some (not all) will find that with a little bit of patience and practice their camera "focus" problems will be gone.
Great Lens April 15, 2008
This lens does everything the manufacturer claims. It is sharp, auto focuses well and is easy to use.
soft and blurry at 2.8 January 27, 2008
I've received one copy of this through amazon, not through a vendor and when compared to my tamron 17-50 2.8, this one is blurry and soft at 2.8.
Before I purchased this lens, I emailed sigma and they claim this lens in some European magazines report this lens is sharper then the tamron 17-50 2.8, however, after getting a soft copy, I emailed sigma with sample shots with comparison to Tamron, and Sigma never replied.
I remember going through 3 copies of the Tamron before I got a good copy from various companies. At least Tamron replied to me when I told them I got a bad copy, and person there gave me the option to exchange it for a good copy. I didn't do that of course, afraid I'd get another bad copy.
The lens was more quiet and seemed to focus faster than the tamron, but it's ashame that the copy I got wasn't up to the quality I expected. For me, it had to be at least 5.6 before things become sharp.
check out photozone dot de that site seems to prefer the tamron. Here's my thought on these review sites. I personally trust photozone, and if there are sites that says lens A is sharper than lens B, it's possible that the particular review site had a bad copy.
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