Product Comparison: Sigma 10-20mm F3.5 EX DC HSM vs Pentax SMC DA 12-24mm F4 ED AL IF

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General Specifications
10-20mm F3.5 EX DC HSM
SMC DA 12-24mm F4 ED AL IF
About the Product
This Ultra wide-angle zoom lens has a maximum aperture of F3.5 throughout the entire zoom range, making it suitable for low-light and indoor photography. It's wide-angle of view from 102.4 degrees produces striking images with exaggerated perspective, enabling photographers to emphasize the subject.
Extreme focal lengths are a challenge, particularly in digital SLR photography. The smc-DA 12-24mm f/4 ED (AL) offers you a lens that permits a total range of wide-angle photography. Utilising aspherical and particularly low-dispersion lens elements, crystal-clear sharpness and photos with marvellous colour depth are assured.
Key Specs
Mount Type
Nikon F-Bayonet
Pentax K
Maximum Aperture
3.5 /f
4 /f
Minimum Focal Length
10 millimeters
12 millimeters
Maximum Focal Length
20 millimeters
24 millimeters
Lens Type
What customers say about "Key Specs"
Sigma 10-20mm F3.5 EX DC HSM Camera Lens
  • I liked the price, build quality and the wide, constant aperture of F/3.5.
  • All apertures are sharp.
  • Constant 3.5 aperture and HSM motor is perfect for video shooting.
  • Wide angle with sharp image and constant aperture.
  • Good maximum aperture, silent and fast focus.
Pentax SMC DA 12-24mm F4 ED AL IF Camera Lens
  • It's sharp, contrast, and the angle of view at 12mm is amazing.
  • The distortion is minimal to my eyes.
  • The range is very good for a walking around lens.
  • Very useful zoom range.
  • Very little distortion. Very sharp. Excellent color rendition.
Size & Weight
3.4 in.
3.3 in.
3.4 in.
3.3 in.
3.5 in.
3.43 in.
18.3 oz.
15.2 oz.
What customers say about "Size & Weight"
Sigma 10-20mm F3.5 EX DC HSM Camera Lens
  • It has a good weight, and I love having the fixed aperture.
  • The lens works absolutely perfectly. Great size and weight.
  • A great lens for real estate and architecture. Good weight.
  • I use this on my D750 and it's a great little lens.
  • Very solidly built. Has good size and weight.
Pentax SMC DA 12-24mm F4 ED AL IF Camera Lens
  • This lens is amazing. Compact size.
  • It's very lightweight, so it's not a burden to carry it around.
  • It's light enough to carry around.
  • It's so small and light.
  • Good size and weight, and superb quality.
Minimum Focus Distance
9.4 in.
11.81 in.
Field Of View
109.7° - 70.7°
99° - 61°
Zoom Type
Auto Focus, Manual Focus
Auto Focus, Manual Focus
Optical Stabilization
What customers say about "Imaging"
Sigma 10-20mm F3.5 EX DC HSM Camera Lens
  • Autofocus works smoothly and the sharpness is good.
  • Autofocus is fast and accurate, and images are sharp enough at any focal length.
  • Zoom is easy. Autofocus is rapid.
  • Works very well in Manual focus.
  • Very good lens. Fast focus and amazing range!
Pentax SMC DA 12-24mm F4 ED AL IF Camera Lens
  • The autofocus is incredibly fast.
  • Fast focus and great image quality.
  • Great range and amazingly sharp!
  • Absolutely sharp and fast lens.
  • Beautiful photo quality. Fast autofocus. Great for portraits.
Brand Compatibility
Sensor Type Compatibility
Lens Groups and Elements
13 Elements in 10 Groups
13 Elements in 11 Groups
Number of Aperture Blades
Filter Diameter
82 millimeters
77 millimeters
HSM (Hyper-Sonic Motor), ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) glass
Aspherical Lens, ED (Extra-Low Dispersion) Glass, Quick-shift Focus, Internal Focusing
What customers say about "Features"
Sigma 10-20mm F3.5 EX DC HSM Camera Lens
  • Beautiful construction and takes incredible images.
  • The build quality of the lens is pretty nice.
  • Very impressed with the quality of this lens.
  • The lens has amazing build quality for the money.
  • It has very fast focus, and I have never had a problem with it. Great lens!
Pentax SMC DA 12-24mm F4 ED AL IF Camera Lens
  • It's feels very solid and well made.
  • Produces beautiful shots, controls flare extremely well.
  • Works well on a K5.
  • This 12-24 is sharp at 12mm wide open.
  • The build feels solid. I'm very happy with this lens.
Warranty / Certifications
Manufacturer Warranty
1 year(s)
1 year(s)
Other Information

Other reviews