This weeks camera is:
A pellicle mirror in a camera is a stationary one, replacing the flipping mirror in a SLR. The object of employing a pellicle mirror is to split the image forming light beam from the camera lens into two separate beams, one passing directly through it to the film or image sensor and the other one being redirected to the finder focusing screen; and in doing so, getting rid of the mirror movement mechanism. The consequence of splitting the light is reduced exposure light intensity and finder brightness. The usual intensity ratio is two to one in favour of the exposure, which works out to about 66% (⅓ stop loss) to the film or sensor and 33% (⅔ stop loss) to the finder.