The JJC ALC-GR3x auto lens cap is specially designed for GR IIIx camera. When the lens extends, the 3 leaves will automatically open. So you do not need to remove the lens cap when shooting. When the lens retracts, the 3 leaves will automatically close. At this time, this lens cap can help you better protect your lens, and make it away from dust, moisture and scratches like other lens caps. No vignetting will be caused with this lens cap on. With this auto lens cap, you will never worry about misplacing or losing your lens cap any more.
•1, Rotate the front ring counterclockwise to remove it.
•2, Align the index dot on the lens cap with the index dot on the camera.
•3, Then rotate the auto lens cap clockwise to secure.