| Sigma 20mm f/1.8 EX DG RF Aspherical Wide Angle Lens for Canon Digital SLR Cameras |  | Brand: Sigma Category: Photography
Buy New: $629.00 as of 5/22/2012 05:31 EDT details
New (4) Used (1) from $589.00
Seller: The Camera Shop of Lansing
Color: black Media: Electronics Shipping Weight (lbs): 1.9 Dimensions (in): 5.5 x 5.4 x 5.1
MPN: 411-101 Model: 411-101 UPC: 085126411275 EAN: 0085126411275
Shipping: Eligible for FREE Super Saver Shipping Availability: Usually ships in 24 hours
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Product Description 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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Blogs | | LensRentals.com - Buy a Sigma 20mm f/1.8 DG for Sony | | 446685867351. 943624492909; 369614607019; 271702009322; 331136620115. Glass. Front element: Flawless; Rear element: Flawless. Imaging. Sharpness: 20/20 line pairs/mm (horizontal/vertical); Spatial consistency: All quadrants equal ... |
| | Sigma 20mm – Not Too Heavy | | I was told by a salesperson that this lens is more than 1 stop faster than the Canon 20mm zoom lenses, which will impress many users. The Sigma 20mm lens offers a soft-focus effect at f/1.8, which not every user will be happy ... |
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