Product comparison · 2 lenses

Canon RF 20mm F1.4 L VCM vs Canon RF-S 7.8 mm F4 STM Dual

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  • 24specifications compared
  • 17differ
  • 7identical
  • 23known for one product only

Key differences

The Canon RF 20mm F1.4 L VCM has 21° more lens viewing angle, horizontal than the Canon RF-S 7.8 mm F4 STM Dual (84° vs 63°). The Canon RF-S 7.8 mm F4 STM Dual has 1° more lens viewing angle, vertical than the Canon RF 20mm F1.4 L VCM (63° vs 62°). The Canon RF 20mm 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°). 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 7.8 mm F4 STM Dual:9/7
  • Lens type
    • RF 20mm F1.4 L VCM:Full-frame lens
    • RF-S 7.8 mm F4 STM Dual:Stereoscopic lens
  • Lens viewing angle, horizontal
    • RF 20mm F1.4 L VCM:84°
    • RF-S 7.8 mm F4 STM Dual:63°
  • Lens viewing angle, vertical
    • RF 20mm F1.4 L VCM:62°
    • RF-S 7.8 mm F4 STM Dual:63°
  • Lens viewing angle, diagonal
    • RF 20mm F1.4 L VCM:94°
    • RF-S 7.8 mm F4 STM Dual:63°
  • Closest focusing distance
    • RF 20mm F1.4 L VCM:0.2 m
    • RF-S 7.8 mm F4 STM Dual:0.15 m
  • Number of diaphragm blades
    • RF 20mm F1.4 L VCM:11
    • RF-S 7.8 mm F4 STM Dual:7
  • AF actuator
    • RF 20mm F1.4 L VCM:VCM
    • RF-S 7.8 mm F4 STM Dual:STM

Side by side

Differences highlightedShow differences only (on)
Comparison of RF 20mm F1.4 L VCM, RF-S 7.8 mm F4 STM Dual
47 specifications
Lens system7 differ
Lens structure (elements/groups)Differs15/119/7
Lens typeDiffersFull-frame lensStereoscopic lens
Lens viewing angle, horizontalDiffers84°63°
Focus adjustmentKnown for oneUnknown — not stated by the sourceAuto/Manual
Lens viewing angle, verticalDiffers62°63°
Fixed focal lengthKnown for oneUnknown — not stated by the source7.8 mm
Lens viewing angle, diagonalDiffers94°63°
Closest focusing distanceDiffers0.2 m0.15 m
Image sensor formatKnown for oneUnknown — not stated by the sourceAPS-C
Maximum aperture numberKnown for oneUnknown — not stated by the source4
Number of diaphragm bladesDiffers117
Zoom capabilityKnown for oneUnknown — not stated by the sourceNo
Image stabilizerKnown for oneYesUnknown — not stated by the source
Image stabilizer typeKnown for oneIn-Body Image Stabilization (IBIS), Optical Image Stabilization (OIS)Unknown — not stated by the source
Performance3 differ
AF actuatorDiffersVCMSTM
Auto focusKnown for oneUnknown — not stated by the sourceYes
Lens coating featuresDiffersAir Sphere Coating (ASC), Fluorine coating, Subwavelength Structure Coating (SWC), Super Spectra Coating (SSC)Super Spectra Coating (SSC)
Manual focusKnown for oneUnknown — not stated by the sourceYes
Maximum magnificationDiffers0.19x0.07x
Number of Ultra-low Dispersion (UD) elementsKnown for one2Unknown — not stated by the source
Lens hoodKnown for oneYesUnknown — not stated by the source
Lens hood modelKnown for oneEW-73HUnknown — not stated by the source
Design2 differ
Mounting typeKnown for oneUnknown — not stated by the sourceBayonet
DustproofDiffersYesNo
Moisture-resistantDiffersYesNo
Market segmentKnown for oneProfessionalUnknown — not stated by the source
Logistics dataidentical
Layers per palletKnown for oneUnknown — not stated by the source5 pc(s)
Weight & dimensions4 differ
DiameterDiffers7.65 cm6.92 cm
Filter sizeDiffers67 mm58 mm
LengthDiffers99.3 mm41.5 mm
WeightDiffers519 g130 g
Packaging dataidentical
Package depthKnown for oneUnknown — not stated by the source110 mm
Package heightKnown for oneUnknown — not stated by the source132 mm
Package weightKnown for oneUnknown — not stated by the source272 g
Package widthKnown for oneUnknown — not stated by the source110 mm
Packaging content1 differ
Lens cap modelDiffersE-67IIE-58II
Rear lens cap includedKnown for oneUnknown — not stated by the sourceYes
Rear lens cap modelKnown for oneUnknown — not stated by the sourceRF
Bag includedKnown for oneYesUnknown — not stated by the source
Bag modelKnown for oneLP1219Unknown — not stated by the source

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