APPLICATION: This item is a 0.5 x C interface adapter to connect a CCD camera or digital eyepiece to a microscope, take photos of the microscope, and expand the field of view when shooting . GOOD VERSATILITY: the upper port is c interface (connected microscope ccd camera, digital camera, industrial camera), the lower mouth is straight 23.2mm, with rubber band, the connection is more secure EFFECT: compact with the lens barrel, so the insertion depth can be easily controlled. The lens is blue anti-reflective coating to increase light transmission. ADAPTERS 23.2-30mm 23.2-30.5mm: In addition, there are two sizes of adapter rings: 23.2-30mm and 23.2-30.5mm, therefore, it can be used on microscopes of three diameters : 23.2mm, 30mm or 30.5mm.It can be directly inserted into biological, stereoscopic and gold eyepiece, or phot ographed at the c interface of the television tube (monocular or trinocular tube). PRODUCT AUTHENTICITY GUARANTEE: Sugreat is the only authorized seller of the brand. Please ensure you purchase from Sugreat to ensure warranty after -sale. Features : This item is a 0.5x C mount adapter to connect a CCD camera or digital eyepiece to the microscope. This item has two adapters: 23.2 turns to 30mm and 23.2 turns at 30.5mm. Effects: Compact yourself with the objective tube, so that the insertion depth can be easily controlled. Anti-reflective blue lens coating, increases transmittance. It can be used in all eyepiece positions with 23.2mm, 30mm or 30.5mm magnification, 0.5 times for wider view. Specification : Material: metal Weight: 142g / 5oz The color black Model: kp-05x Interface: C mount Interface size: 23.2 turn 30mm; 23.2mm turn 30.5mm (as pictures shown) Package List: 1set x Lens Adapter Note : 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.