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Sigma 20mm F1.8 EX DG Aspherical RF vs Zeiss Carl Distagon T 3,518
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Sigma 20mm F1.8 EX DG RF

Wideangle Prime | Nikon F (DX)

Sigma 20mm F1.8 EX DG Aspherical RF

BUY from B&H PHOTO
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Carl Zeiss Distagon T3,5/18

Wideangle Prime | Nikon F (FX)

Sigma 20mm F1.8 EX DG Aspherical RF

BUY from B&H PHOTO
Reasons to choose Sigma 20mm F1.8 EX DG Aspherical RF over Carl Zeiss Distagon T 3,518
Price $405 vs $1,395 Cheaper by $990
Focal Length - Tele 20mm vs 18mm 2mm more tele coverage
Max Aperture - Wide 1.8 vs 3.5 faster lens at wide
Diaphragm Blades 9 vs better Bokeh
Autofocus Yes vs None Easier and more accurate focusing
Reasons to choose Carl Zeiss Distagon T 3,518 over Sigma 20mm F1.8 EX DG Aspherical RF
Focal Length - Wide 18mm vs 20mm 2mm wider coverage
Weight 470 g vs 520 g 50 g lighter
Diameter 87 mm vs 89 mm 2 mm smaller in diameter
Length 84 mm vs 90 mm 6 mm shorter
Sigma 20mm F1.8 EX DG RF vs Carl Zeiss Distagon T3,5/18 Specs Table
Detailed comparison of specifications
General Sigma 20mm F1.8 EX DG RF Carl Zeiss Distagon T3,5/18
Brand Sigma Zeiss
Lens Type Prime Prime
Price $404.99 $1,395.00
Lens Type Wideangle Prime Wideangle Prime
Lens Mount Nikon F (DX) Nikon F (FX)
Max Format 35mm FF 35mm FF
Focal Range 20mm 18mm
Image Stabilization No No
Colour Black Unknown
Zoom Method No Zoom No Zoom
Power Zoom No No
Zoom Lock No No
Zoom Ratio 1.0X 1.0X
Aperture
Max Aperture F1.8 F3.5
Min Aperture F22.0 F22.0
Aperture Ring Yes Yes
Diaphragm Blades 9 unknown
Optics
Optical Elements 13 13
Optical Groups 11 11
Special Elements 2 aspherical elements unknown
Focusing
Min Focus Distance 0.2m 0.3m
Max Magnification unknown 0.083X
Autofocus Yes No
AF Motor Type unknown None
Full Time Manual Yes N/A
Focus Method Rear Unknown
Distance Scale Yes Yes
DoF Scale Yes Yes
Distance Scale Yes Yes
Focus Distance Limiter Unknown Unknown
Physical Specs
Weight 520g 470g
Diameter 89mm 87mm
Length 90mm 84mm
Materials Unknown metal barrel, metal mount
Weather Sealing Unknown No
Filter Thread 82mm 82mm
Filter Notes - -
Hood Supplied Yes Yes
Hood Code petal type hood Unknown
Tripod Collar No No
Optional Accessories - -
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