Sigma 20mm F1.8 EX DG Aspherical RF vs Rokinon 24mm f1.4 Aspherical Detailed Comparison

Sigma 20mm F1.8 EX DG Aspherical RF vs Rokinon 24mm f1.4 Aspherical

Lens to replace

Change

Wideangle Prime | Sony Alpha

Change

Rokinon 24mm f1.4

Wideangle Prime | Sony Alpha

Reasons to choose Sigma 20mm F1.8 EX DG Aspherical RF over Rokinon 24mm f1.4 Aspherical

Price	$405 vs $479	Cheaper by $74
Focal Length - Wide	20mm vs 24mm	4mm wider coverage
Diaphragm Blades	9 vs	better Bokeh
Autofocus	Yes vs None	Easier and more accurate focusing
Weight	520 g vs 580 g	60 g lighter

Reasons to choose Rokinon 24mm f1.4 Aspherical over Sigma 20mm F1.8 EX DG Aspherical RF

Sigma 20mm F1.8 EX DG RF vs Rokinon 24mm f1.4 Specs Table

Detailed comparison of specifications

General	Sigma 20mm F1.8 EX DG RF	Rokinon 24mm f1.4
Brand	Sigma	Rokinon
Lens Type	Prime	Prime
Price	$404.99	$479.00
Lens Type	Wideangle Prime	Wideangle Prime
Lens Mount	Sony Alpha	Sony Alpha
Max Format	35mm FF	35mm FF
Focal Range	20mm	24mm
Image Stabilization	No	No
Colour	Black	Black
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	F1.4
Min Aperture	F22.0	F22.0
Aperture Ring	Yes	Yes
Diaphragm Blades	9	unknown
Optics
Optical Elements	13	13
Optical Groups	11	12
Special Elements	2 aspherical elements	4 ED glass elements, 2 aspherical elements
Focusing
Min Focus Distance	0.2m	0.25m
Max Magnification	unknown	unknown
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	580g
Diameter	89mm	83mm
Length	90mm	Unknown
Materials	Unknown	Unknown
Weather Sealing	Unknown	No
Filter Thread	82mm	77mm
Filter Notes	-	-
Hood Supplied	Yes	Unknown
Hood Code	petal type hood	Unknown
Tripod Collar	No	No
Optional Accessories	-	-
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