Product comparison · 2 lenses

Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE vs Canon RF-S 7.8 mm F4 STM Dual

26specifications compared
13differ
13identical
16known for one product only

Key differences

The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 81° more lens viewing angle, horizontal than the Canon RF-S 7.8 mm F4 STM Dual (144° vs 63°). The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 81° more lens viewing angle, vertical than the Canon RF-S 7.8 mm F4 STM Dual (144° vs 63°). The Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE has 81° more lens viewing angle, diagonal than the Canon RF-S 7.8 mm F4 STM Dual (144° vs 63°). Lens structure (elements/groups): 11/8 on the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE, 9/7 on the Canon RF-S 7.8 mm F4 STM Dual. Lens type: Wide fish-eye lens on the Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE, Stereoscopic lens on the Canon RF-S 7.8 mm F4 STM Dual.

Lens structure (elements/groups)
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:11/8
- RF-S 7.8 mm F4 STM Dual:9/7
Lens type
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:Wide fish-eye lens
- RF-S 7.8 mm F4 STM Dual:Stereoscopic lens
Lens viewing angle, horizontal
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
- RF-S 7.8 mm F4 STM Dual:63°
Lens viewing angle, vertical
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
- RF-S 7.8 mm F4 STM Dual:63°
Lens viewing angle, diagonal
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:144°
- RF-S 7.8 mm F4 STM Dual:63°
Closest focusing distance
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:0.2 m
- RF-S 7.8 mm F4 STM Dual:0.15 m
Maximum aperture number
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:3.5
- RF-S 7.8 mm F4 STM Dual:4
Lens coating features
- RF-S 3.9mm F3.5 STM DUAL FISHEYE:Air Sphere Coating (ASC)
- RF-S 7.8 mm F4 STM Dual:Super Spectra Coating (SSC)

Side by side

Differences highlightedShow differences only

Comparison of RF-S 3.9mm F3.5 STM DUAL FISHEYE, RF-S 7.8 mm F4 STM Dual
42 specifications	A Canon RF-S 3.9mm F3.5 STM DUAL FISHEYE View product	B Canon RF-S 7.8 mm F4 STM Dual View product
Lens system7 differ
Lens structure (elements/groups)Differs	11/8	9/7
Lens typeDiffers	Wide fish-eye lens	Stereoscopic lens
Lens viewing angle, horizontalDiffers	144°	63°
Focus adjustmentKnown for one	Unknown — not stated by the source	Auto/Manual
Lens viewing angle, verticalDiffers	144°	63°
Fixed focal lengthKnown for one	Unknown — not stated by the source	7.8 mm
Lens viewing angle, diagonalDiffers	144°	63°
Closest focusing distanceDiffers	0.2 m	0.15 m
Maximum aperture numberDiffers	3.5	4
Zoom capabilityKnown for one	Unknown — not stated by the source	No
Performance2 differ
Auto focusKnown for one	Unknown — not stated by the source	Yes
Lens coating featuresDiffers	Air Sphere Coating (ASC)	Super Spectra Coating (SSC)
Manual focusKnown for one	Unknown — not stated by the source	Yes
Maximum magnificationDiffers	0.03x	0.07x
CompatibilityKnown for one	EOS R7	Unknown — not stated by the source
Number of Ultra-low Dispersion (UD) elementsKnown for one	2	Unknown — not stated by the source
Designidentical
Mounting typeKnown for one	Unknown — not stated by the source	Bayonet
Logistics dataidentical
Layers per palletKnown for one	Unknown — not stated by the source	5 pc(s)
Weight & dimensions4 differ
DiameterDiffers	11.2 cm	6.92 cm
Filter sizeDiffers	30.5 mm	58 mm
LengthDiffers	54.6 mm	41.5 mm
WeightDiffers	290 g	130 g
Extended lengthKnown for one	8.37 cm	Unknown — not stated by the source
Packaging dataidentical
Package depthKnown for one	Unknown — not stated by the source	110 mm
Package heightKnown for one	Unknown — not stated by the source	132 mm
Package weightKnown for one	Unknown — not stated by the source	272 g
Package widthKnown for one	Unknown — not stated by the source	110 mm
Packaging contentidentical
Lens cap modelKnown for one	Unknown — not stated by the source	E-58II
Rear lens cap modelKnown for one	Unknown — not stated by the source	RF

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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