Sigma 20mm f/1.8 EX DG DF RF Sony-alpha

$629
20 mm
autofocus prime lens
f/1.8

reviewswhat are people saying


Rated 4.5 out of 5 stars by 3 users at B&H Photo Video

"The Sigma 20mm f1.8 is very good lens that captures bright and clear images under low light. The price point is a plus. I was amazed at the clarity and the nuance the lens allowed me to capture."

"Excellent lens for wide angle pictures! I use it on a Sony Alpha 900. Takes great pictures and is easy to attach and remove."

"The autofocus is a little slow and the lens a little heavy, but it do not affect the handling."

compatibilitywith digital cameras

Full frame

This lens is compatible with Full frame cameras such as the Sony SLT-A99.

horizontal angle of view
83.7°
20mm
35mm equivalent focal length

APS-C (1.5x crop factor)

This lens is compatible with APS-C (1.5x crop factor) cameras such as the Sony SLT A57, Sony SLT A58 and Sony SLT-A37.

horizontal angle of view
60.9°
30.5mm
35mm equivalent focal length

Pros

The Sigma 20mm f/1.8 EX DG DF RF Sony-alpha vs other Sony Alpha (Full-frame) lenses

	Prime lens
	Typically very sharp

	Great wide angle lens
	20 mm

	Wide aperture
	f/1.8

The Sigma 20mm f/1.8 EX DG DF RF Sony-alpha vs other Sony Alpha (Full-frame) low light lenses

	Supports autofocus
	Easier to use

Cons

The Sigma 20mm f/1.8 EX DG DF RF Sony-alpha vs other Sony Alpha (Full-frame) lenses

	Poor telephoto lens
	20 mm

	Lacks a silent focus motor
	Louder and slower

Specifications

General

	Min focal length	20 mm
	Max focal length	20 mm	below average
	Zoom range	1x	below average
	Magnification	1:4 (0.2x)
Aperture

	Wide minimum	f/1.8	above average
	Wide maximum	f/22
	Tele minimum	f/1.8	above average
	Tele maximum	f/22
Features

	Auto focus	Yes
	Focus motor	None	below average
	Image stabilization	None
	Fisheye	No
	Tilt-shift	No
Form factor

	Lens mount	Sony Alpha (Full-frame)
	Length	86 mm
	Diameter	89 mm
	Filter size	82 mm
	Weight	0.5 kg
Angle of view

	Wide horizontal	84°	above average
	Telephoto horizontal	84°	below average
	Wide vertical	61.9°	above average
	Telephoto vertical	61.9°	below average
	Wide diagonal	94.5°	above average
	Telephoto diagonal	94.5°	below average
Angle of view (On Sony Alpha DT APS-C 1.5x crop cameras)

	Wide horizontal	61.1°
	Telephoto horizontal	61.1°	below average
	Wide vertical	43.1°
	Telephoto vertical	43.1°	below average
	Wide diagonal	70.7°
	Telephoto diagonal	70.7°	below average

DiscussionWhat do you think about the Sigma 20mm f/1.8 EX DG DF RF Sony-alpha lens?

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Sigma 20mm f/1.8 EX DG DF RF Sony-alpha

reviewswhat are people saying

compatibilitywith digital cameras

Full frame

APS-C (1.5x crop factor)

Pros

The Sigma 20mm f/1.8 EX DG DF RF Sony-alpha vs other Sony Alpha (Full-frame) lenses

The Sigma 20mm f/1.8 EX DG DF RF Sony-alpha vs other Sony Alpha (Full-frame) low light lenses

Cons

The Sigma 20mm f/1.8 EX DG DF RF Sony-alpha vs other Sony Alpha (Full-frame) lenses

Specifications

General

Aperture

Features

Form factor

Angle of view

Angle of view (On Sony Alpha DT APS-C 1.5x crop cameras)

DiscussionWhat do you think about the Sigma 20mm f/1.8 EX DG DF RF Sony-alpha lens?

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