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

Key differences

The Canon RF 20 mm F1.4L 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 RF 20 mm F1.4L VCM has 31° more lens viewing angle, diagonal than the Canon RF-S 7.8 mm F4 STM Dual (94° vs 63°). The Canon RF 20 mm F1.4L 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 RF 20 mm F1.4L VCM has dustproof. Lens structure (elements/groups): 15/11 on the Canon RF 20 mm F1.4L VCM, 9/7 on the Canon RF-S 7.8 mm F4 STM Dual.

• Lens structure (elements/groups)
  • RF 20 mm F1.4L VCM:15/11
  • RF-S 7.8 mm F4 STM Dual:9/7
• Lens type
  • RF 20 mm F1.4L VCM:Wide-angle
  • RF-S 7.8 mm F4 STM Dual:Stereoscopic lens
• Fixed focal length
  • RF 20 mm F1.4L VCM:20 mm
  • RF-S 7.8 mm F4 STM Dual:7.8 mm
• Lens viewing angle, diagonal
  • RF 20 mm F1.4L VCM:94°
  • RF-S 7.8 mm F4 STM Dual:63°
• Closest focusing distance
  • RF 20 mm F1.4L VCM:0.2 m
  • RF-S 7.8 mm F4 STM Dual:0.15 m
• Maximum aperture number
  • RF 20 mm F1.4L VCM:1.4
  • RF-S 7.8 mm F4 STM Dual:4
• Number of diaphragm blades
  • RF 20 mm F1.4L VCM:11
  • RF-S 7.8 mm F4 STM Dual:7
• Maximum magnification
  • RF 20 mm F1.4L VCM:0.19x
  • RF-S 7.8 mm F4 STM Dual:0.07x