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Product comparison · 2 lenses

Canon RF-S 7.8 mm F4 STM Dual vs Canon RF20mm F1.4 L VCM

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  • 27specifications compared
  • 15differ
  • 12identical
  • 23known for one product only

Key differences

The Canon RF20mm F1.4 L VCM has 12.2 mm more fixed focal length than the Canon RF-S 7.8 mm F4 STM Dual (20 mm vs 7.8 mm). The Canon RF20mm F1.4 L VCM has 31° more lens viewing angle, diagonal than the Canon RF-S 7.8 mm F4 STM Dual (94° vs 63°). The Canon RF20mm F1.4 L VCM has 0.05 m more closest focusing distance than the Canon RF-S 7.8 mm F4 STM Dual (0.2 m vs 0.15 m). Only the Canon RF20mm F1.4 L VCM has dustproof. Lens structure (elements/groups): 9/7 on the Canon RF-S 7.8 mm F4 STM Dual, 15/11 on the Canon RF20mm F1.4 L VCM.

  • Lens structure (elements/groups)
    • 9/7
    • 15/11
  • Lens type
    • Stereoscopic lens
    • Wide-angle
  • Fixed focal length
    • 7.8 mm
    • 20 mm
  • Lens viewing angle, diagonal
    • 63°
    • 94°
  • Closest focusing distance
    • 0.15 m
    • 0.2 m
  • Maximum aperture number
    • 4
    • 1.4
  • Number of diaphragm blades
    • 7
    • 11
  • Maximum magnification
    • 0.07x
    • 0.19x

Side by side

Differences highlightedShow differences only
50 specifications
A

Canon

RF-S 7.8 mm F4 STM DualView product
B

Canon

RF20mm F1.4 L VCMView product
Lens system7 differ
Component forMILCMILC
Lens structure (elements/groups)Differs9/715/11
Lens typeDiffersStereoscopic lensWide-angle
Lens viewing angle, horizontalKnown for one63°
Focus adjustmentKnown for oneAuto/Manual
Lens viewing angle, verticalKnown for one63°
Fixed focal lengthDiffers7.8 mm20 mm
Lens viewing angle, diagonalDiffers63°94°
Closest focusing distanceDiffers0.15 m0.2 m
Control ringYesYes
Image sensor formatKnown for oneAPS-C
Lens mount interfaceCanon RFCanon RF
Maximum aperture numberDiffers41.4
Minimum aperture number1616
Number of diaphragm bladesDiffers711
Zoom capabilityNoNo
Number of aspheric elementsKnown for one2
Performance2 differ
AF actuatorKnown for oneSTM
Auto focusYesYes
Camera brands compatibilityCanonCanon
Lens coating featuresDiffersSuper Spectra Coating (SSC)Air Sphere Coating (ASC), Fluorine coating, Sub-wavelength Structure Coating (SWC)
Manual focusYesYes
Maximum magnificationDiffers0.07x0.19x
Number of Ultra-low Dispersion (UD) elementsKnown for one2
Ultrasonic motor (USM)Known for oneYes
Lens hoodKnown for oneYes
Lens hood shapeKnown for onePetal lens hood
Lens hood typeKnown for oneRemovable lens hood
Lens hood modelKnown for oneEW-73H
Design1 differ
Product colourBlackBlack
Mounting typeBayonetBayonet
DustproofDiffersNoYes
Moisture-resistantKnown for oneNo
Market segmentKnown for oneProfessional
WeatherproofKnown for oneYes
Logistics dataidentical
Layers per palletKnown for one5 pc(s)
Weight & dimensions4 differ
DiameterDiffers6.92 cm7.65 cm
Filter sizeDiffers58 mm67 mm
LengthDiffers41.5 mm99.3 mm
WeightDiffers130 g519 g
Packaging dataidentical
Package depthKnown for one110 mm
Package heightKnown for one132 mm
Package weightKnown for one272 g
Package widthKnown for one110 mm
Packaging content1 differ
Lens cap includedYesYes
Lens cap modelDiffersE-58IIE-67II
Rear lens cap includedYesYes
Rear lens cap modelKnown for oneRF
Bag includedKnown for oneYes
Bag modelKnown for oneLP1219

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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