Shutter size

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Leaf shutters exist in various diameters that have been more or less standardized.

  • #000[1]
  • #00 (requires a 26.3 mm hole in the lensboard[2])
  • #0 (34.6 mm hole)
  • #1 (41.6 mm hole)
  • #3 (65 mm hole)
  • #2 (50-55 mm hole)[3]


  1. e.g. Compur 000-X Model CN-1914-00 with M20.5 x 0.5 thread.
  2. Compur shutter brochure reproduced in part at S.K. Grimes.
  3. S.K. Grimes, cited above, states that there was not at first a #2 shutter. Shutters made in intermediate between #1 and #3 are called this, but they are uncommon, and vary in their dimensions.