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

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)

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Carl Zeiss Distagon T3,5/18

Wideangle Prime | Nikon F (FX)

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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	-	-
	Report	Report

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