Product Description

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Product Details

• Brand: Sigma
• Model: B0007U0H06
• Dimensions: 4.90" h x 5.40" w x 5.60" l, .95 pounds

Features

• Designed to fit Nikon digital SLR cameras
• 30 mm focal length
• 2 low-dispersion glass elements; glass mold aspherical lens element
• 45-degree angle of view
• 15.7-inch minimum focusing distance

Amazon.com Product Description
Designed to match the APS-C size image sensors of Nikon digital SLR cameras, the Sigma 30mm f/1.4 lens is an ideal choice for a wide range of applications, including snapshots, portraiture, indoor shooting, and landscape photography. The 30mm lens relies on two special-low-dispersion glass elements and a glass-mold aspherical lens. Combined, the construction details correct for all types of chromatic and color aberrations. The lens is also equipped with a Hyper Sonic Motor (HSM) that supports quiet, high-speed autofocus, but also turns off should you prefer full-time manual focusing. Other features include a maximum aperture of f/1.4, a 62mm filter mount, and a one-year warranty.

Specifications

• Focal length: 30mm
• Maximum aperture: f/1.4
• Lens construction: 7 elements in 7 groups
• Angle of view: 45 degrees (SD format)
• Number of diaphragm blades: 8
• Minimum aperture: f/16
• Minimum focusing distance: 15.7 inches
• Maximum magnification: 1:10.4
• Filter size: 62mm
• Corresponding AF mounts: Nikon
• Dimensions: 2.97 inches in diameter and 2.3 inches long
• Weight: 15.2 ounces
• Warranty: 1 year

From the Manufacturer

This large aperture 30 millimeters f1.4 EX DC HSM lens is designed to match the APS-C size image sensors of digital SLR cameras. Two SLD glass elements are especially effective in the compensation of magnification chromatic aberration.

Glass mold aspherical lens at rear group of lens reduces color aberration and provides high-quality image results.

From 40 centimeter (15.7 inches) minimum focusing distance to infinity, this lens creates very sharp images with high contrast.

The HSM models provide quiet high-speed auto-focus shooting, as well as full time manual focus. Large maximum aperture of f1.4 can perform superbly in a great range of applications, including snapshots, portraiture, indoor shooting and landscape photography.

• Large maximum aperture of f1.4
• The most appropriate coating for digital SLR cameras
• Two SLD (Special Low Dispersion) glass elements and an hybrid aspherical lens, provides the utmost correction for all types of aberrations
• Equipped with HSM (Hyper Sonic Motor) system

Note to customers: Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

Customer Reviews

Great lens. No qualms with it.
Bought this for my Nikon D40. Very fast, sharp wide open, and perfect focal length for me for indoor shots. For the cost, its can't be a bad buy.

Great lens with only one flaw, and a serious one it is
FYI I just got my Sigma 30mm f/1.4 today. Everything's GREAT about it and it's like shooting film with 50mm again. I love lens. Color contrast etc looked GREAT. Bokeh is soft and beautiful (soft & creamy, not donut shaped, not harsh). However, it's got one serious flaw, one that's well reported on Amazon's review-- focus problem. Auto focus system tends to focus in front (like myopic) so whatever I'm aiming at is blurred. It's really GREAT in manual focus mode, but unusable in AF. Apparently, many people have had to send the lens to Sigma back for recalibration. I'm just going to return to the store tomorrow.

Too bad. I was thrilled about it... it was like shooting film with my good 'ol 50mm lens. I guess I'll wait a while for Sigma to flush out problems. Otherwise, it's a really really nice lens.

Three stars only because I've NEVER in my life had to send a lens back, and considering how common this problem is, I'm surprised Sigma hasn't done the responsible thing even after releasing this lens for a while-- recall and better quality control.

By the way if Nikon or Canon step up and create a 30mm f/1.4 lens (EF-S/DX), I'd buy it in a heart beat even if it costs more. There is an obvious hole in the DX/1.6 half frame lens lineup where it's missing a 50mm equivalent focal length prime lens. The only reason why people flock to this problematic Sigma is because Nikon and Canon fail to step up and create something that people have asked for for a very long time.

Fits my needs exactly
So far the lens exceeds my reduced expectations after reading as many user reviews as I could find. I have not noticed any focus issues under any conditions so far using it on a d40. The pictures are sharp and the lens gives the 'normal' perspective that I was missing with my Nikon 50 1.8. The biggest downside is the lens is much much larger and heavier than I expected. The d40 with the Sigma 30 is heavier than a d70 with the Nikon 50mm... Bonus exercise I guess.