Product comparison · 2 lenses

Canon RF 20 mm F1.4L VCM vs Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE

22specifications compared
12differ
10identical
23known for one product only

Key differences

The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 50° more lens viewing angle, diagonal than the Canon RF 20 mm F1.4L VCM (144° vs 94°). The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 2.1 more maximum aperture number than the Canon RF 20 mm F1.4L VCM (3.5 vs 1.4). The Canon RF 20 mm F1.4L VCM has 4 more diaphragm blades than the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE (11 vs 7). Only the Canon RF 20 mm F1.4L VCM has dustproof. Lens structure (elements/groups): 15/11 on the Canon RF 20 mm F1.4L VCM, 11/8 on the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE.

Lens structure (elements/groups)
- RF 20 mm F1.4L VCM:15/11
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:11/8
Lens type
- RF 20 mm F1.4L VCM:Wide-angle
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:Wide fish-eye lens
Lens viewing angle, diagonal
- RF 20 mm F1.4L VCM:94°
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
Maximum aperture number
- RF 20 mm F1.4L VCM:1.4
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:3.5
Number of diaphragm blades
- RF 20 mm F1.4L VCM:11
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:7
Maximum magnification
- RF 20 mm F1.4L VCM:0.19x
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:0.03x
Dustproof
- RF 20 mm F1.4L VCM:Yes
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:No
Diameter
- RF 20 mm F1.4L VCM:7.65 cm
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:11.2 cm

Side by side

Differences highlightedShow differences only

Comparison of RF 20 mm F1.4L VCM, RF-S 3.9mm F3.5 STM DUAL FISHEYE
45 specifications	A Canon RF 20 mm F1.4L VCM View product	B Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE View product
Lens system5 differ
Component for	MILC	MILC
Lens structure (elements/groups)Differs	15/11	11/8
Lens typeDiffers	Wide-angle	Wide fish-eye lens
Fixed focal lengthKnown for one	20 mm	Unknown — not stated by the source
Lens viewing angle, diagonalDiffers	94°	144°
Closest focusing distance	0.2 m	0.2 m
Control ring	Yes	Yes
Lens mount interface	Canon RF	Canon RF
Maximum aperture numberDiffers	1.4	3.5
Minimum aperture number	16	16
Number of aspheric elementsKnown for one	2	Unknown — not stated by the source
Number of diaphragm bladesDiffers	11	7
Zoom capabilityKnown for one	No	Unknown — not stated by the source
Lens viewing angle, horizontalKnown for one	Unknown — not stated by the source	144°
Lens viewing angle, verticalKnown for one	Unknown — not stated by the source	144°
Image sensor formatKnown for one	Unknown — not stated by the source	APS-C
Performance2 differ
Auto focusKnown for one	Yes	Unknown — not stated by the source
Camera brands compatibility	Canon	Canon
Lens coating featuresDiffers	Air Sphere Coating (ASC), Fluorine coating, Sub-wavelength Structure Coating (SWC)	Air Sphere Coating (ASC)
Manual focusKnown for one	Yes	Unknown — not stated by the source
Maximum magnificationDiffers	0.19x	0.03x
Number of Ultra-low Dispersion (UD) elements	2	2
Ultrasonic motor (USM)Known for one	Yes	Unknown — not stated by the source
Lens hoodKnown for one	Yes	Unknown — not stated by the source
Lens hood shapeKnown for one	Petal lens hood	Unknown — not stated by the source
Lens hood typeKnown for one	Removable lens hood	Unknown — not stated by the source
Lens hood modelKnown for one	EW-73H	Unknown — not stated by the source
AF actuatorKnown for one	Unknown — not stated by the source	STM
CompatibilityKnown for one	Unknown — not stated by the source	EOS R7
Design1 differ
Market segmentKnown for one	Professional	Unknown — not stated by the source
Product colour	Black	Black
Mounting typeKnown for one	Bayonet	Unknown — not stated by the source
DustproofDiffers	Yes	No
WeatherproofKnown for one	Yes	Unknown — not stated by the source
Moisture-resistantKnown for one	Unknown — not stated by the source	No
Weight & dimensions4 differ
DiameterDiffers	7.65 cm	11.2 cm
Filter sizeDiffers	67 mm	30.5 mm
LengthDiffers	99.3 mm	54.6 mm
WeightDiffers	519 g	290 g
Extended lengthKnown for one	Unknown — not stated by the source	8.37 cm
Packaging contentidentical
Bag includedKnown for one	Yes	Unknown — not stated by the source
Bag modelKnown for one	LP1219	Unknown — not stated by the source
Lens cap included	Yes	Yes
Lens cap modelKnown for one	E-67II	Unknown — not stated by the source
Rear lens cap included	Yes	Yes

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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