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Introductions: AF extension tube set can transform customer's Nikon lens into DSLR body Moves lens from film or digital sensor Closer focus is greater magnification Extension tube does not affect image quality as there is no optics inside In comparison, close up filter is often blamed for degrading quality of image This tube set contains three piece tubes of various lengths such as 12/20/36mm, which can be used individually or in any combination to obtain the desired magnification, total 7 various lengths These extension tubes are designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with most Nikon lenses, given there is enough light to activate the cameras AF system properly Specifications: Compatible with all for Nikon DSLR cameras Materials:Plastic+Metal Advanced design Smooth surface Color:Black Package includes: Brand New Extension Tube*1