Extension Tubes

In addition to adapters, there are also extension tubes, used for macro photography:

  • Fotodiox — NKZ30 (35mm extension tube for Z lenses on Z mount)
  • JJC — AET-NKZII (11 and 16mm extension tubes for Z lenses on Z mount)
  • KenkoDG (10 and 16mm extension tubes for Z lenses on Z mount)
  • Meike — MK-Z-AF1 (11 and 18mm extension tubes for Z lenses on Z mount)
  • Viltrox — DG-Z set (12 and 24mm extension tubes for Z lenses on Z mount)

How do extension tubes change things? Here's a simple example using 70mm on the 24-70mm f/4 lens used at f/5.6:

  • no tube provides 1:3.3 ratio
  • 11mm tube provides ~1:2 
  • 12mm tube provides 1:2
  • 18mm tube provides 1:1.7
  • 24mm tube provides 1:1.5
  • 35mm tube provides 1:1.1

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