Sigma 10-20mm f/4-5.6 EX DC Lens for Pentax and Samsung SLR Cameras

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Product Details

• Product Dimensions: 3.2 x 3.3 x 3.3 inches ; 1 pounds
• Shipping Weight: 2 pounds (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B000ELC666
• Item model number: B000ELC666
• Average Customer Review: 4.5 out of 5 stars  See all reviews (196 customer reviews)
• Date first available at Amazon.com: June 17, 2003

Product Description

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

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.

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Customer Reviews

Most Helpful Customer Reviews

174 of 175 people found the following review helpful:

5.0 out of 5 stars I didn't plan on buying this lens but I am glad I did, October 21, 2006

By	Craig 1959 "RAV Fan" (Ottawa, Canada) - See all my reviews

I went into a local camera store to look at the Nikon 12-24mm wide angle zoom to eventually augment the Nikon 50mm 1.8 and 18-200mm VR I currently use on my D200. After seeing the Sigma 10-20mm, taking test shots with it and the Nikon, and then printing the shots in the store, I walked out with the Sigma lens.

I had planned to buy the 12-24mm Nikon next Spring when my budget would allow the expenditure. I have had success with Nikon optics in the past - starting with my first Nikon FM back in the seventies. The Sigma's good construction, nice finish, smooth+fast+quiet focusing and 10mm focal length convinced me to try my first non-Nikon lens in 30 years. A big factor: The Sigma lens is less than half the price of the Nikon lens here is Canada. It fit my budget, so I took the plunge.

The Sigma fits into my "sharp enough" category. In real world shooting, its sharpness is on par with my 18-200mm Nikon. Both lens are less sharp than my $100 50mm 1.8 when "test" images are blown up to 16"x20" size. I never notice any lack of sharpness in "real" pictures. I care more about color saturation, contrast and color balance anyway. In this area, the Sigma does well. Saturation and contrast are equal to both my other Nikon lens - particularly at f8 and smaller aperatures. Wide open, I find some weakening in contrast. The Sigma has a warmer color termperature than my other lens. One click toward blue in Photoshop would fix this minor variance in color. But I use my 10-20mm almost exclusively for landscapes. The warmer color is generally a good thing.

I have noticed some vignetting @ 10mm f4. Zooming to 12mm or stopping down to f5.6 elminates any artifacts in pictures I have taken thus far. I have found it's more important to avoid "thick framed" filters - and stacking filters is a no no with this lens. They cause more darkening than a wide open f-stop. BTW: I added a 72 to 77mm step-up ring to my 18-200m VR Nikon to allow me to share filters between my zoom lens.

I do miss having a manual/autofocus switch on the Sigma lens. I have accidently nudged the manual focus ring a couple of times. With that said, the incredible depth of field of this lens (or any lens at this focal length) means small focusing errors can be tolerated :)

I recommend this lens - even to people like me, who never had a non-nikon lens before.

177 of 181 people found the following review helpful:

5.0 out of 5 stars best value wide angle., February 9, 2006

By	K. Dardashti "Electronics fan" (los angeles usa) - See all my reviews (REAL NAME)

there are currently 4 wide angle zoom choices available on the EF-S canon mount (d-rebel/xt/20d) canon 10-22, Sigma 12-24, sigma 10-20, tokina 12-24. Of these, sigma 12-24 is the only one which is usuable on a full frame sensor (canon 1d, 5d, possible future cameras). There is sizable difference in field of view between the 10 mm, and 12 mm. and the tokina is closer to 13 mm on its wide end. The sigma retails for about 2/3 the price of the canon. Optically they are very similar, with the canon having a larger maximum aperature, which is generally not important in a wide angle lens. The built construction is EX, they higher line of sigma, and it excellent. The focus motor is HSM, making it fast, and very accurate. Resolution chart show the sharpness to be very close to that of canon. The color and contrast is excellent, the flare and chromatic abberation genenrally well controlled. A fun lens to use, and excellent value.

75 of 77 people found the following review helpful:

5.0 out of 5 stars Super Super Glass, June 30, 2006

By	RonAnnArbor (Ann Arbor, MI United States) - See all my reviews (TOP 500 REVIEWER)

Having purchased both the Nikon 12+ and the Sigma 10+ before returning the Nikkor and keeping this Sigma, I can honestly say that I can not be happier with this lens. The photos are super sharp, the lens works perfectly, it feels good on my D200, and it has become the only other lens I carry along with my 18-200 VR. I can't recommend this lens more.