Attachment for Gossen Lunasix line of handheld exposure meters made by Gossen. It allows for narrowing of the metering field from 30 degrees down to 15 or even 7.5. It has an additional viewing port for more precise metering. It clips onto the front of appropriate light meters. Plastic body available in grey.

• Size: 63 x 50 x 46 mm
• Weight: 48g