Been a manufacturer in camera accessories area for years, Fotga has designed many excellent product like DP500 & DP3000 follow focus, matte box,elec extension auto tube....etc, these series rig fittings special designed for standard 15mm rig system, for each 15mm rods, each end processed with inner thread, so you can extend the rod with the rod connector. Save you money and extend the period of use !
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