These 2 Bronica ETR lenses are rated for infrared photography from real-world tests by IR photographers. Ratings are Good (2 lenses), Maybe (0 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
Good 40mm ƒ/4 Bronica Zenzanon MC 40mm f/4
KEH B&H		 ⌀67mm   Hotspot visible at ƒ/11.  
Good 50mm ƒ/2.8 Bronica Zenzanon MC 50mm f/2.8
KEH B&H		 ⌀67mm   No hotspot.  

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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

Bronica ETR Lens Mount Adapters

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

B&H - Bronica ETR lens mount adapters