Magna Sight Enlarger Magnifying Grain Focuser
A grain focuser (or focus finder) is a darkroom tool used in film photography to achieve critical, sharp focus when making enlargements. It acts as a specialized microscope, magnifying the actual silver grain of the projected negative (usually 10x-25x). By looking through the eyepiece, you can adjust the enlarger lens to make the grain, rather than just the image, look perfectly crisp, ensuring maximum print sharpness.I bought this in 1968 at Alfredo's cameras in New Orleans, La. The Magna Sight Enlarger grain focuser was the highest-quality magnifying focuser I could afford, and I've used it for ~60 years now.