Kenko DG Auto Extension Tube Set for the Nikon AF Mount

Pros: Maintain intelligent metering system, AF capability

Cons: Weak mechanical linkage when all 3 mounted together

The Bottom Line: These tubes are an essential accessory to closeup photography. A cheaper alternative to Nikon PK-series tubes, but there's a compromise.

Review: For some reason Nikon does not make autofocus extension tubes. The Kenko auto extension tubes are the option for Nikon AF. They will maintain intelligent metering system in addition to AF ability. I recently decided to invest in these tubes after using...