These 4 Rolleiflex SL66 lenses are rated for infrared photography from real-world tests by IR photographers. Ratings are Good (2 lenses), Maybe (2 lenses), Bad (0 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
Maybe 40mm ƒ/4 Carl Zeiss Distagon HFT 40mm F/4
 Bay 104 1,502 g Hot spot starts at ƒ/8  
Maybe 50mm ƒ/4 Rollei Distagon HFT 50mm F/4
 ⌀67mm 624 g Hot spot starts at ƒ/11  
Good 80mm ƒ/2.8 Rollei Planar HFT 80mm F/2.8
B&H		 ⌀67mm 590 g Very diffuse hot spot at ƒ/22  
Good 150mm ƒ/4 Rollei Sonnar HFT 150mm F/4
 ⌀67mm 903 g Hot spot starts at ƒ/16  

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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

Rolleiflex SL66 Lens Mount Adapters

Use an adapter to mount these lenses to many mirrorless cameras.

B&H - Rolleiflex SL66 lens mount adapters