Hopf’s Brilliant focusing screens are ground to perfection using a grit compound designed for optimal diffusion and “brightness”.
Brilliant focusing screens provide the brightest image view with good contrast and detail in both highlights and shadows.
Your focusing screen is the interface between the image and your camera. It is an integral part. Like a lense or shutter, the focusing screen is essential and the camera system is usless without it.
It only makes sense to use the best and brightest for easy viewing and razor sharp focusing.