Product comparison · 2 lenses

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

24specifications compared
15differ
9identical
13known for one product only

Key differences

The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 60° more lens viewing angle, horizontal than the Canon RF 20mm F1.4 L VCM (144° vs 84°). The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 82° more lens viewing angle, vertical than the Canon RF 20mm F1.4 L VCM (144° vs 62°). The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 50° more lens viewing angle, diagonal than the Canon RF 20mm F1.4 L VCM (144° vs 94°). Only the Canon RF 20mm F1.4 L VCM has dustproof. Only the Canon RF 20mm F1.4 L VCM has moisture-resistant.

Lens structure (elements/groups)
- RF 20mm F1.4 L VCM:15/11
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:11/8
Lens type
- RF 20mm F1.4 L VCM:Full-frame lens
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:Wide fish-eye lens
Lens viewing angle, horizontal
- RF 20mm F1.4 L VCM:84°
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
Lens viewing angle, vertical
- RF 20mm F1.4 L VCM:62°
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
Lens viewing angle, diagonal
- RF 20mm F1.4 L VCM:94°
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
Number of diaphragm blades
- RF 20mm F1.4 L VCM:11
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:7
AF actuator
- RF 20mm F1.4 L VCM:VCM
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:STM
Maximum magnification
- RF 20mm F1.4 L VCM:0.19x
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:0.03x

Side by side

Differences highlightedShow differences only

Comparison of RF 20mm F1.4 L VCM, RF-S 3.9mm F3.5 STM DUAL FISHEYE
37 specifications	A Canon RF 20mm F1.4 L VCM View product	B Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE View product
Lens system6 differ
Component for	MILC	MILC
Lens structure (elements/groups)Differs	15/11	11/8
Lens typeDiffers	Full-frame lens	Wide fish-eye lens
Lens viewing angle, horizontalDiffers	84°	144°
Lens viewing angle, verticalDiffers	62°	144°
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
Minimum aperture number	16	16
Number of diaphragm bladesDiffers	11	7
Image stabilizerKnown for one	Yes	Unknown — not stated by the source
Image stabilizer typeKnown for one	In-Body Image Stabilization (IBIS), Optical Image Stabilization (OIS)	Unknown — not stated by the source
Image sensor formatKnown for one	Unknown — not stated by the source	APS-C
Maximum aperture numberKnown for one	Unknown — not stated by the source	3.5
Performance3 differ
AF actuatorDiffers	VCM	STM
Camera brands compatibility	Canon	Canon
Lens coating featuresDiffers	Air Sphere Coating (ASC), Fluorine coating, Subwavelength Structure Coating (SWC), Super Spectra Coating (SSC)	Air Sphere Coating (ASC)
Maximum magnificationDiffers	0.19x	0.03x
Number of Ultra-low Dispersion (UD) elements	2	2
Lens hoodKnown for one	Yes	Unknown — not stated by the source
Lens hood modelKnown for one	EW-73H	Unknown — not stated by the source
CompatibilityKnown for one	Unknown — not stated by the source	EOS R7
Design2 differ
Market segmentKnown for one	Professional	Unknown — not stated by the source
Product colour	Black	Black
DustproofDiffers	Yes	No
Moisture-resistantDiffers	Yes	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 includedKnown for one	Unknown — not stated by the source	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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