This is a research camera based on a Polaroid film holder made by Funakoshi Co., Ltd. The lens has a fixed focus, and the magnification is changed using the included red filter and hood set. This product comes with shooting sets for 0.45x and 0.81x magnification. Basically, it is equipped with filters that are ideal for the red light emitted from fluorescently stained samples. Please understand that this is a specification suitable for specific experiments before purchasing. This item is used, but it is in good condition with no noticeable scratches. Additional information: The instruction manual is included.