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F Mount

IRIS Ring​

The iris control ring adjusts the aperture of the lens. Turn the ring clockwise to open the aperture, and counter-clockwise to close down the aperture to the f-stop set on the lens.

caution

Iris control acts as an override to the aperture set on the lens itself and will set the aperture to the lens f-stop minimum when fully rotated.

info

Some lenses lack the rear control lever, so the iris control ring has no effect

Mounting​

  1. Turn the iris control ring all the way counterclockwise until stop is reached.
  2. Remove the camera body cap by turning counterclockwise.
  3. Remove the rear lens cap by turning counterclockwise.
  4. Align the mark on the lens to 12:00, then insert.
  5. Turn counterclockwise until the release pin engages and stop is reached.
caution

Always support large / heavy lenses independently from the camera. Follow the lens manufacturers’ guidelines.

note

Optionally close the shutter before removing the body cap or lens to protect the sensor.

Unmounting​

  1. Push release pin in and turn clockwise until lens releases.
  2. Replace the rear lens cap by turning clockwise.
  3. Replace the camera body cap by turning clockwise.

Nikon F Lenses​

Coverage​

Nikon F lenses are designed to be either full-frame (FX series) or APS-C (DX series) formats. Be sure to use a full-frame lens for full sensor coverage.