Used between camera and lens. Magnification can be adjusted from 0.57 x 1.06x (with standard 75mm lens attached in normal position) or from 1.93 x to 2.35x (with 55mm lens attached in reverse) by means of an internal helicoid thread to enable change of magnification. Can be used with all lenses except 300/4 ED IF. Item includes front and rear protective caps. Brand Name:
Pentax Helicoid Extension Tube 645 (43.767.4mm) for 645 Series Cameras
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