Diffuser mask made by Minolta for the Auto Meter II / III / VI and Flash Meter II / III. When it is used with the Flash Meter II / III / VI it allows you to measure the ratio between the main and auxiliary electronic flashes (light balancing), illuminance value of continuous light, and guide numbers of electronic or M-bulb flash units can be determined. When used with the Auto Meter II / III it can take illuminance readings and measure lighting ratios of continuous light sources. Plastic body available in black.

• Size: 35 x 11 mm
• Weight: 4g