The Sigma Finder Cap is a dedicated accessory for Sigma SD1 Merrill. It is attached to the camera viewfinder eyepiece to prevent stray light entering the viewfinder and affect the exposure system of the camera when self-timer or remote control is in used or the user does not look through the viewfinder.
The Sigma Finder Cap is designed exclusively for for Sigma SD1 Merrill to prevent stray light affecting the camera exposure system.