Think Tank Hydrophobia Eyepiece for Canon R3

The Think Tank Hydrophobia Eyepiece enables you to see through the camera lens when the camera's rain cover is assembled. Compatible with the Canon R3, this eyepiece is a watertight accessory that is important while shooting outdoors in unpredictable weather. The Think Tank eyepiece can be used with 300-600 V2.0, 70-200, and flash 70-200 covers.

Price: £ 25.99 from Wex Photo Video