Product comparison · 2 lenses

Canon RF 50mm f/1.8 STM vs Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE

14specifications compared
10differ
4identical
20known for one product only

Key differences

The Canon RF 50mm f/1.8 STM has 0.1 m more closest focusing distance than the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE (0.3 m vs 0.2 m). The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 1.7 more maximum aperture number than the Canon RF 50mm f/1.8 STM (3.5 vs 1.8). The Canon RF 50mm f/1.8 STM has 6 more minimum aperture number than the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE (22 vs 16). Component for: SLR on the Canon RF 50mm f/1.8 STM, MILC on the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE. Lens structure (elements/groups): 6/5 on the Canon RF 50mm f/1.8 STM, 11/8 on the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE.

Component for
- RF 50mm f/1.8 STM:SLR
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:MILC
Lens structure (elements/groups)
- RF 50mm f/1.8 STM:6/5
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:11/8
Closest focusing distance
- RF 50mm f/1.8 STM:0.3 m
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:0.2 m
Maximum aperture number
- RF 50mm f/1.8 STM:1.8
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:3.5
Minimum aperture number
- RF 50mm f/1.8 STM:22
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:16
Maximum magnification
- RF 50mm f/1.8 STM:0.25x
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:0.03x
Diameter
- RF 50mm f/1.8 STM:6.92 cm
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:11.2 cm
Filter size
- RF 50mm f/1.8 STM:43 mm
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:30.5 mm

Side by side

Differences highlightedShow differences only

Comparison of RF 50mm f/1.8 STM, RF-S 3.9mm F3.5 STM DUAL FISHEYE
34 specifications	A Canon RF 50mm f/1.8 STM View product	B Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE View product
Lens system5 differ
Component forDiffers	SLR	MILC
Lens structure (elements/groups)Differs	6/5	11/8
Lens typeKnown for one	Unknown — not stated by the source	Wide fish-eye lens
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°
Lens viewing angle, diagonalKnown for one	Unknown — not stated by the source	144°
Closest focusing distanceDiffers	0.3 m	0.2 m
Control ringKnown for one	Unknown — not stated by the source	Yes
Image sensor formatKnown for one	Unknown — not stated by the source	APS-C
Maximum aperture numberDiffers	1.8	3.5
Minimum aperture numberDiffers	22	16
Fixed focal lengthKnown for one	50 mm	Unknown — not stated by the source
Number of aspheric elementsKnown for one	1	Unknown — not stated by the source
Image stabilizerKnown for one	Yes	Unknown — not stated by the source
Image stabilizer number of stopsKnown for one	7	Unknown — not stated by the source
Performance1 differ
AF actuatorKnown for one	Unknown — not stated by the source	STM
CompatibilityKnown for one	Unknown — not stated by the source	EOS R7
Lens coating featuresKnown for one	Unknown — not stated by the source	Air Sphere Coating (ASC)
Maximum magnificationDiffers	0.25x	0.03x
Number of Ultra-low Dispersion (UD) elementsKnown for one	Unknown — not stated by the source	2
Designidentical
DustproofKnown for one	Unknown — not stated by the source	No
Moisture-resistantKnown for one	Unknown — not stated by the source	No
Weight & dimensions4 differ
DiameterDiffers	6.92 cm	11.2 cm
Filter sizeDiffers	43 mm	30.5 mm
LengthDiffers	40.5 mm	54.6 mm
Extended lengthKnown for one	Unknown — not stated by the source	8.37 cm
WeightDiffers	160 g	290 g
Packaging contentidentical
Lens cap includedKnown for one	Unknown — not stated by the source	Yes
Rear lens cap includedKnown for one	Unknown — not stated by the source	Yes
Technical detailsidentical
Viewing angleKnown for one	46°	Unknown — not stated by the source

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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