The Kenko Auto Extension Tube Set DG contains three tubes of different length--12mm, 20mm, and 36mm--which can be used individually or in any combination to obtain the desired magnification. Actual magnification effect changes with each specific lens. This DG Extension Tube Set has upgraded "Gate-Array IC" circuitry to work better with digital SLRs and some of the digital SLR lenses*. Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance.

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