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Sigma 10-20mm f/4-5.6 EX DC Lens for Pentax and Samsung SLR Cameras | 
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| Brand: Sigma
Category: Photography
List Price: $479.99
Buy New: $409.95
You Save: $70.04 (15%)
New (4) from $409.95
Rating:  5 reviews
Media: Electronics
Fragile: No
Batteries Included: No
Maximum Focal Length: 20
Minimum Focal Length: 10
Shipping Weight (lbs): 1
Dimensions (in): 3.2 x 3.3 x 3.3
MPN: B000ELC666
Model: B000ELC666
UPC: 085126201609
EAN: 0085126201609
ASIN: B000ELC666
Release Date: May 4, 2006
Availability: Usually ships in 1-2 business days
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| Features:
| • | 10-20mm ultra-wide angle lens designed for Pentax and Samsung digital SLR cameras | | • | 3 special low dispersion (SLD) glass elements to compensate for color aberration | | • | Multilayer lens coating reduces flare and ghost; 9.4-inch close focusing distance | | • | Measures 3.3 inches in diameter and 3.2 inches long; weighs 16.4 ounces |
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Product Description
10-20mm F4-5.6 EX DC lens allows enjoyment of super wide-angle photography and it is a very powerful tool for indoor shooting and landscape photography with APS-C size image sensors of digital SLR cameras.Wide angle of view (102.4 ? at 10mm and 63.8 ? at 20mm) offers the photographer greater freedom of expression. Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses. One piece of glass mold and two hybrid aspherical lenses, offer excellent correction for distortion, as well as all types of aberration.This lens is equipped with an inner focusing system and also offer full time manual focusing. It has a minimum focusing distance of 24cm (9.4") at all focal lengths. The non-rotating lens barrel perfectly suits the petal shaped lens hood. A circular polarizing filter can also be used conveniently.
Amazon.com Product Description
Designed exclusively for Pentax digital SLR cameras, the ultra-wide-angle 10-20mm offers a view from 102.4 to 63.8 degrees, making it ideal for landscape photography and other vast applications. The lens is distinguished by its three special low dispersion (SLD) glass elements, which effectively compensate for color aberration, and its aspherical lenses, which provide maximum correction for distortion and various aberrations. As a result, the lens produces an extremely high image quality throughout the entire zoom range. Other details include a minimum focusing distance of 9.4 inches at all focal lengths and an integral petal-type hood to block out extraneous light.
Lens Elements and Coating
The new multilayer lens coating and lens design reduce flare and ghost--a common problem with digital cameras--while also creating an optimal color balance throughout the entire zoom range. At the same time, the lens offers three SLD glass elements that effectively compensate for color aberration, along with a piece of glass mold and two hybrid aspherical lenses that offer excellent correction for distortion and all types of aberration.
Inner Focusing System
The lens incorporates an internal focusing system that eliminates front lens rotation, letting you use a petal-type hood to protect from additional glare.
Best Consumer Lens
The Sigma 10-20mm lens is so respected that it was named the best consumer lens in Europe (2006) by the Technical Image Press Association (TIPA), a collection of 31 publications from 12 countries. According to TIPA, the 10-20mm lens offers a versatile range of wide-angle focal lengths, a good optical performance, and a budget price, making it an excellent investment for owners of DSLRs with APS-C format sensors. Its sharpness remains constant throughout the zoom range, and its compact size makes it an ideal companion for shooting travel, landscapes, or architectural subjects. - Lens construction: 14 elements in 10 groups
- Angle of view: 102.4 to 63.8 degrees
- Number of diaphragm blades: 6
- Minimum aperture: f/22
- Minimum focusing distance: 9.4 inches
- Maximum magnification: 1:6.7
- Filter size: 77mm
- Dimensions: 3.3 inches in diameter and 3.2 inches long
- Weight: 16.4 ounces
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| Customer Reviews:
 Casual photographer November 23, 2008
Kevin Cummings
1 out of 2 found this review helpful
I like the lens--it significantly extends the range of my camera. The distortion, particularly below 12mm is significant. It's quite a large lens. I recommend you ensure your bag can handle it. I recommend you get a UV filter if just for the physical protection it affords to the large, bulging outer lens. Overall build and performance is good, but I think it's a bit expensive for what you get.
 Incredible Lens - Incredible Value July 26, 2008
Doctor Pickles (U.S.A.)
2 out of 3 found this review helpful
I've only had this lens for about 24 hours, and it's already one of my favorites.
The build on this lens is magnificent. It feels very sturdy, and has a beautiful matte black finish that looks very sharp and professional. It includes a lens hood and padded cloth case, both of which are of a similarly high quality. (I'll add pictures of the lens, hood, and case later on.)
The angle of view from this lens is breathtaking. Just from the few test shots I've done in my apartment I'm astounded at how much of the space this lens is able to capture, with almost no distortion at all. Most lenses with this wide an angle would show significant fish-eye distortion, but this lens does a virtually flawless job of correcting those distortions and providing sharp, accurate images with a wide field of view.
I did a lot of comparison shopping before deciding on the Sigma 10-20, and this lens is everything I had hoped for and more.
If you're interested in getting an ultra-wide-angle lens on a budget you will not be disappointed with this one.
Amazing lens! July 5, 2008
JcR (SLC, UT)
2 out of 2 found this review helpful
I've had this lens for four months now. I wanted to get a good feel for it before I signed off on it.
I have been completely impressed with this lens on my K10D. At 10mm, the lens is super wide, but doesn't distort images like a fisheye lens would, unless you get very close to your subject. At 20mm, there is very little noticeable distortion.
This lens is extremely sharp when shooting with a medium aperture, much sharper than I would have hoped for.
Overall, this is an incredible lens, and well worth the money.
A real wonder June 2, 2008
Bart De Kesel (Belgium)
0 out of 3 found this review helpful
Just perfect, wonderful pictures at an affordable price. the distortion is a real very minimal. I also have the PENTAX Fish-eye objectief smc DA 10-17mm f/3,5-4,5ED (IF), but that is pure for fun.
 Very good lens. If you can focus it correctly. March 17, 2008
6x9 (Europe)
8 out of 8 found this review helpful
My first impression when I received a package with this lens was "Wow!".
This lens is very well built and it comes with a dedicated case.
There was an extended warranty from Sigma included with the lens in addition to the standard one. If I remember well, it was 4 or 5 years in total. Very good, Sigma!
The Sigma 10-20 mm f/4-5.6 EX lens for Pentax mount looks different from the picture on Amazon. It does not have the window for scale, instead the last one is just painted on the barrel. And certainly it is not HSM, but a "screwdriver" type.
It mounts and locks on my *istDs and K10D easily. Surprisingly, I still can rotate the lens in the mount (in locked position) to a small but noticeable degree. It seems that the lock mechanism on this lens has "extended" tolerance and/or the mount coupling lens-body is not tight enough. This is a bit annoying. The zoom barrel is stiff in operation, so it happens to me to push it a bit harder and so turn the lens in the mount.
Now a few words about the optical quality of this lens.
I read many reports stating that their copy of the lens was good, as well as the ones stating the opposite.
Although my copy of this lens is not as sharp as my prime lenses (which was expected), it is good. But there is one "BUT".
My lens is sharp provided it is focused correctly. This is something difficult to achieve in certain situations and especially at wider angles. With this lens the AF tends to lock elsewhere, but not on the subject. And often there is no consistency - even if I focus several times on the same subject which is 3 meters away, the AF may lock anywhere from 1 m to infinity.
I am not sure if this is the lens or the camera AF system which causes such behaviour. In most cases I just set the distance manually and rely on the DOF.
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