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Canon RF-S 7.8mm F4 STM Dual

Canon RF Autofocus

Canon RF-S 7.8mm F4 STM Dual

Focal length
7.8 mm
Aperture
f/4
Weight
131 g
Filter diameter
58 mm
Min. focus distance
15 cm
Length
41.5 mm
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At a Glance

The 7.8 mm lens for Canon RF on APS-C corresponds to 12 mm in full-frame equivalent and is built as a stereoscopic dual lens. At 131 g it is compact. The aperture is f/4 and the minimum focus distance is 15 cm. Autofocus interlocks across both lenses. It suits landscape, architecture, interiors and travel.

Good for

  • Landscape
  • Architecture
  • Interiors
  • Travel

Worth knowing

  • APS-C image circle: on full-frame cameras only usable in crop mode, at reduced resolution.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

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Min. focal length
7.8 mm
Max. focal length
7.8 mm
Max. aperture (min. zoom)
f/4
Max. aperture (max. zoom)
f/4
Min. aperture
f/16
Elements
9
Groups
7
Weight
131 g (0.29 lb)
Filter diameter
58 mm
Min. focus distance
15 cm (5.91 in)
Max. magnification
1:14.3 (0.07×)
Length
41.5 mm (1.63 in)
Diameter
69.2 mm (2.72 in)
Released
November 2024

Manufacturer data: global.canon

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Canon RF-S 7.8mm F4 STM Dual fit?

The Canon RF-S 7.8mm F4 STM Dual is designed for APS-C sensors. On APS-C Canon RF cameras its field of view equals 12 mm in full-frame terms. Full-frame bodies use it in APS-C (crop) mode, recording only part of the sensor and fewer megapixels.

Canon RF cameras

Full frame (in APS-C mode):
Canon EOS R8 Mark II,Canon EOS R6 V,Canon EOS R6 Mark III,Canon EOS C50,Canon EOS R1,Canon EOS R5 Mark II,Canon EOS C400,Canon EOS C80,Canon EOS R8,Canon EOS R6 Mark II,Canon EOS R5 C,Canon EOS R3,Canon EOS R5,Canon EOS R6,Canon EOS Ra,Canon EOS RP,Canon EOS R
APS-C:
Canon EOS R50 V,Canon EOS R100,Canon EOS R50,Canon EOS R7,Canon EOS R10,Canon EOS C70

Canon RF-S 7.8mm F4 STM Dual compared

Key specs side by side with the most similar Canon RF lenses.

LensCanon RF-S 7.8mm F4 STM DualSG-image MF 7.5mm F2.8 FisheyeBrightin Star MF 7.5mm F2.8 IV APS-C FisheyeTTArtisan 7.5mm f/2 Fisheye
Focal length7.8 mm7.5 mm7.5 mm7.5 mm
Max. aperturef/4f/2.8f/2.8f/2
Weight131 g326 g277 g370 g
Filter diameter58 mm–––
Min. focus distance15 cm12 cm15 cm12.5 cm
Length41.5 mm54 mm52 mm57 mm
Autofocusyesnonono
Image stabilizationnononono
Open these lenses in the comparison and add more

Canon RF-S 7.8mm F4 STM Dual: FAQ

Does the Canon RF-S 7.8mm F4 STM Dual have autofocus?

Yes, the Canon RF-S 7.8mm F4 STM Dual has autofocus.

Does the Canon RF-S 7.8mm F4 STM Dual have image stabilization?

No, the Canon RF-S 7.8mm F4 STM Dual has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the Canon RF-S 7.8mm F4 STM Dual weigh?

The Canon RF-S 7.8mm F4 STM Dual weighs 131 g. It is 41.5 mm long with a diameter of 69.2 mm.

What filter size does the Canon RF-S 7.8mm F4 STM Dual use?

The Canon RF-S 7.8mm F4 STM Dual takes 58 mm screw-in filters.

How close can the Canon RF-S 7.8mm F4 STM Dual focus?

The minimum focus distance of the Canon RF-S 7.8mm F4 STM Dual is 15 cm, measured from the sensor plane.

Is the Canon RF-S 7.8mm F4 STM Dual a full-frame lens?

No, the Canon RF-S 7.8mm F4 STM Dual is an APS-C lens. On APS-C cameras its field of view equals 12 mm in full-frame terms.

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