Sigma

Sigma 20mm f/1.8 EX Aspherical DG DF RF AutoFocus Super Wide Angle Lens with Hood for Pentax AF Cameras - USA Warranty

SKU: SG2018PXAF MFR: 411109
Usually ships in 7-10 Business Days.
Your card will only be charged once item ships.
Buy together and save
Save up to $30.00 with bundle.
Why Adorama?
Easy Returns, Fast Shipping, Trusted for over 35 years.

Need help? Call 800-223-2500 212-741-0052

Our Price

$629.00
Free Shipping
Qty:

Add to Wishlist

Protect your investment

About the Sigma 20mm F/1.8

Sigma 20mm f1.8 EX DG Aspherical RF is one of several EX Series lenses. It is the first 20mm Super wide-angle lens in the world with a large aperture of F1.8 and angle of view 94.5°. It has Macro focusing capability with a minimum focusing distance of 20cm/7.9inches (reproduction ratio 1:4). The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus image. It incorporates an aspherical lens element in the front as well as rear lens groups, to minimize distortion, spherical aberration and astigmatism. The lens has non-vignetting optical construction, in order to obtain adequate peripheral brightness with open aperture. This is especially desirable for digital cameras. The lens incorporates a rear focus system eliminating front lens rotation, thus allowing the use of a Perfect Hood and easy use of polarizing filters. The lens also incorporates dual-focus mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. The lens materials used in this lens are lead and arsenic free ecological glass.

Sigma 20mm F/1.8 Includes

  • Lens Hood, Front & Rear Lens Caps, Pouch Case, 1 Year International Warranty plus 3 Year Sigma U.S.A. Extended Warranty (Total Warranty is 4 Years from Date of Purchase)

Summary of Customer Reviews

(5)
Customers most agreed on the following attributes:
Pros:
Strong construction (3)
Reviewer Profile:
AA shutterbug 30 years (1) , Enthusiast (1) , Semi-professional (1) , Semi-pro photographer (1)

Sigma 20mm F/1.8 Specifications

Construction 11 groups /13 elements
Angle of view 94.5°
F stop range 22
Closest Focusing Distance 20cm / 7.9"
Maximum Magnification 1:4
Filter Size 82mm
Dimensions (Length x Diameter) 88.5 x 87mm / 3.5 x 3.4"
Weight 520g / 18.3oz.
Feedback
Adorama.com is top rated for customer service HACKER SAFE certified sites prevent over 99.9% of hacker crime. BBB Accredited Business