Product Description Size: 180mm * 160mm Color: Black Material: Metal Package Contents: 1 * Macro PTZ 【Specifications】: Aluminum four-way macro focusing film. There is a standard 1/4" screw that fits most Nikon, Minolta and Pentax macros and bellows, macro lens extension tubes or macro lenses like Canon FD and FL.2. 【Four Directions】：The four-way macro focus slide bar can be adjusted in four directions by two rotary knobs: forward, backward, left and right. (Please tighten the knob after adjustment to prevent the camera from moving slightly. After setup)3. 【Quality Assurance】：The slide rail uses strong and durable aluminum slide block and gear system to improve accuracy. The positive locking knob ensures a firm rock focus.4. 【Provide Excellent Focus Adjustment】：The focus guide is an essential accessory for macro photography. It requires precise distance changing and a stable palm, as well as precise camera positioning in other situations. The camera distance can be adjusted easily, and the smooth movement of the rack and pinion can provide extremely fine focus adjustment.