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Blue Fireball M48 Female to M56 Male Thread Adapter # M-11

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  • Adapter for use with cameras with large sensors and accessories with M56 threads


  • M56x0.75 male thread on one side and M48x0.75 female thread all the way through
  • Low profile - only 1mm optical path length
  • Precision machined, black anodized aluminum


  • Weight = 0.3oz
  • Total length = 5.9mm (0.23")
  • M48 Female thread specification = M48x0.75
  • Length of M48 female thread = 5.9mm (0.23")
  • M56 Male thread specification = M56x0.75
  • Length of M56 male thread (including unthreaded undercut) = 4.9mm (0.19")
  • Optical length = 1mm (0.04")
  • Clear aperture = 47.3mm (1.86")
  • Maximum outside diameter = 60.2mm (2.37")


Note: Occasionally, the product you receive might have a slightly different cosmetic appearance or labeling than what is shown. This can often change from batch to batch according to the whims of the manufacturer. However, you will always receive a brand new, original product as described above.

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Filed under: Eyepieces & Accessories