Hasselblad Extension Tube H26mm for H Series Cameras
Extension tubes are designed to enable a lens to
focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject (making it appear larger in the
viewfinder and in your
pictures). They are exceptionally useful for
macro photography, enabling you to convert almost any lens into a macro lens at a fraction of the cost while maintaining its original optical quality.
The extension tubes have no optics. They are mounted in between the camera body and lens to create more distance between the lens and film plane. By moving the lens father away from the
CCD sensor in the camera, the lens is forced to focus much closer than normal. The greater the length of the extension tube, the closer the lens can focus.