Kaavie - Copper Mountain Version (Strong and Light Weight, the Better Option Range Goal) - Set Extension Tube 12/20/36mm Af Macro Autofocus SLR Nikon Af AFS D40x D40 D50 D60 D70 D3000 D3100 D3200 D5000 D5100 D5200 D7000 D7100 D80 D90 D100 D200 D300 D300s D700 D600 D800 D2 D3 D4 - F5 F6 F75 F100, 50mm 35mm 28mm 24mm Etc. .. The best on the market AUTO FOCUS MACRO EXTENSION TUBE SET FOR NIKON, Compatible with Nikon Nikkor AF, AF-S, D, G and VR lenses. Ideal for macro work! three dimensions giving seven combinations! Sizes are 12mm tube, 20mm and 36mm Machined from copper, Incredible matte surface treatment, Professional and compact design, Built-in gilded electric pins, Flexible combinations, the best on the market You can mount the tubes between lens and body of the camera to get your choice of macro ranges. There are a total of eight combinations. Please note the following: * During macro shooting, you should DEFINITELY always focus manually. We also recommend a tripod and macro slide in order to find the focus point can be lighter and finer. We also recommend lots of light. If you can combine all three rings together, the AF may not work correctly anymore. For some lenses, the AF does not work. However, in any case, all relevant data is transmitted to the camera such as aperture, Exif data, required exposure values, etc.