Metal achromatic 3X Barlow lens 3 times multiplier with camera thread M42/1.25 inches

Metal Ballov teleconverter 3 times magnification. Optical element, physical calculation magnification. Using it not only increases the magnification, the imaging will also be clearer, which is up to 15 times clearer than the general extender. High-quality teleconverter. Can be connected to the SLR camera bayonet, increase the multiple when connected to the camera to take pictures.