Sigma EX 20 mm F/1.8 DG EX RF ASP Lens For Canon
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Sigma EX 20 mm F/1.8 DG EX RF ASP Lens For Canon

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Sigma EX 20 mm F/1.8 DG EX RF ASP Lens For Canon

This super-wide-angle lens is ensured minimal light-fall-off with superior peripheral brightness. The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background. This is an ideal DG lens optimized Digital SLR camera.The minimum focusing distance of this lens is 20cm (7.9 inch) and it has maximum magnification of 1: 4 with fast F 1.8 maximum aperture. The minimum focusing distance of 20cm (7.9 inch) and 94.5¡ angle of view allow close up photography surrounding the photographic subject.The lens incorporates Dual-Focus (DF) 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 rear focus system eliminates the need for the front of the lens to rotate, thus allowing the use of a "Petal-type hood", which is superior light blocking effect.The use of aspherical lens elements in both of the front and rear lens groups effectively compensates for distortion, spherical aberration and astigmatism.

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Sigma 20mm f/1.8 EX DG RF Aspherical Wide Angle Lens for Canon Digital SLR Cameras

The Sigma 20mm f/1.8 D EX DG Aspherical Lens has a clutch-like system for switch between AF and MF modes. The system is very similar to the Sigma 105mm f/2.8 EX macro lens I reviewed previously. You push the manual focus ring forward to disengage the focus ring for auto-focusing. For manual focusing, you pull it toward you to engage the clutch. When the ring is set to AF, you can rotate the focusing ring all you want, you won't change the focus on the lens. When the lens is auto-focusing, it also doesn't effect the position of the manual-focusing ring. The manual focus ring is wide so there is no chance that you'll miss it in operation.

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Sigma 20mm f/1.8 EX DG RF Aspherical Wide Angle Lens for Canon Digital SLR Cameras

Sigma 20mm f/1.8 EX DG RF Aspherical Wide Angle Lens for Canon Digital SLR Cameras

Stock Availability: In stock
Base Price: $629.00
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Total Price: $629.00

Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF AF Lens for Canon + Opteka UV Filter + Opteka CPL Filter + Opteka 5 Pie

Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF AF Lens for Canon + Opteka UV Filter + Opteka CPL Filter + Opteka 5 Piece Cleaning Kit

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Base Price: $629.00
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Product Details and Features

Dimensions

Diameter 3.5 inch
Weight 18.34 oz

Compatibility

Compatible Brand Canon
Camera Technology Digital
Camera Type SLR

Lens System

Focal Length 20 mm
Focus Type Auto & Manual
Maximum Aperture F/1.0
Type Wide Angle
Min Aperture 22

Other Features

Brand Sigma

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