These are full-frame Canon RF-mount lenses. For APS-C (RF-S) Canon RF-mount lenses, see the Canon RF-S Mount page. Both RF and RF-S lenses use the same physical RF mount. Full-frame RF lenses can be used on APS-C bodies without vignetting.

These 2 Canon RF lenses are rated for infrared photography from real-world tests by IR photographers. Ratings are Good (0 lenses), Maybe (0 lenses), Bad (2 lenses), and Unknown (0 lenses) for hot spots, the bright spot some lenses leave in the center of an infrared image, and follow the thresholds below.

IR Focal
Length		 Minimum
Aperture		 Lens Filter Weight Notes Images
Bad 35mm ƒ/1.4 Voigtländer Nokton Classic 35mm F1.4 SE
KEH 		⌀55mm 260 g Severe hot spot at ƒ/5.6 and above. Gerry Allen  
Bad 35mm ƒ/1.8 Canon RF 35mm f/1.8
KEH Adorama B&H		 ⌀52mm 305 g Kolari lists this as a good lens, but I get strong hotspots above ƒ/4. Easy to fix below that. Gary Syrba  

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What the ratings mean. Hot spots usually appear as you increase the lens ƒ-number, so each rating depends on the lowest ƒ-stop where a hot spot shows and how severe it is, and the thresholds differ by sensor format.

  • Good: No hot spots, or one that starts at ƒ/11 or higher where diffraction impacts image sharpness.
  • Maybe: Contains a mild hot spot that starts at ƒ/5.6 or ƒ/8 and is correctable in editing.
  • Bad: A hot spot that starts at ƒ/4 or lower, or is hard to correct in editing.
  • Unknown: No data reported.

How reports are checked and rated