Samyang 20mm F1.8 ED AS UMC vs Sigma 20mm F1.8 EX DG Aspherical RF Detailed Comparison

Samyang 20mm F1.8 ED AS UMC vs Sigma 20mm F1.8 EX DG Aspherical RF

Lens to replace

Change

Wideangle Prime | Canon EF

Change

Sigma 20mm F1.8 EX DG RF

Wideangle Prime | Canon EF

Reasons to choose Samyang 20mm F1.8 ED AS UMC over Sigma 20mm F1.8 EX DG Aspherical RF

Reasons to choose Sigma 20mm F1.8 EX DG Aspherical RF over Samyang 20mm F1.8 ED AS UMC

Price	$405 vs $438	Cheaper by $33
Diaphragm Blades	9 vs 7	better Bokeh
Autofocus	Yes vs None	Easier and more accurate focusing

Samyang 20mm F1.8 vs Sigma 20mm F1.8 EX DG RF Specs Table

Detailed comparison of specifications

General	Samyang 20mm F1.8	Sigma 20mm F1.8 EX DG RF
Brand	Samyang	Sigma
Lens Type	Prime	Prime
Price	$438.00	$404.99
Lens Type	Wideangle Prime	Wideangle Prime
Lens Mount	Canon EF	Canon EF
Max Format	35mm FF	35mm FF
Focal Range	20mm	20mm
Image Stabilization		No
Colour	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	F1.8
Min Aperture	F22	F22.0
Aperture Ring	Yes	Yes
Diaphragm Blades	7	9
Optics
Optical Elements	13	13
Optical Groups	12	11
Special Elements	Two aspherical + 3 ED elements, Ultra Multi Coating	2 aspherical elements
Focusing
Min Focus Distance	0.2m	0.2m
Max Magnification	unknown	unknown
Autofocus	No	Yes
AF Motor Type	No AF	unknown
Full Time Manual	Yes	Yes
Focus Method	Internal	Rear
Distance Scale	Yes	Yes
DoF Scale	Unknown	Yes
Distance Scale	Yes	Yes
Focus Distance Limiter	Unknown	Unknown
Physical Specs
Weight	497g	520g
Diameter	83mm	89mm
Length	88mm	90mm
Materials	Unknown	Unknown
Weather Sealing	No	Unknown
Filter Thread	77mm	82mm
Filter Notes	-	-
Hood Supplied	Yes	Yes
Hood Code	Unknown	petal type hood
Tripod Collar	No	No
Optional Accessories	-	-
	Report	Report

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