RF-S 3.9mm F3.5 STM Dual Fisheye

Focus

Autofocus

Mount

Canon RF-S

Format

APS-C

Groups

8

Elements

11

Weight

290g

Length mm

54.6

Spec Notes

VERIFIED REAL: dual stereoscopic fisheye for EOS VR (R7 fw1.5.0+, R50 V), left/right 144° on one APS-C sensor. Element/group/blade are Canon's per-lens figures. 30.5mm rear filter (not front) → filter Mm omitted. Box dims 112.0 x 83.7 x 54.6mm → diameter Mm omitted, length recorded. 60mm baseline. No IS.

Stabilized

No

Max Aperture

f/3.5

Min Aperture

f/16

Min Focus Distance

20cm

Weight Basis

Canon Approx.

Aperture Blades

7

Min Focus Basis

Canon: from focal plane

Max Magnification

0.03x