The compact hoodloupe optical viewfinder for 32 lcd displays is used to make a close inspection of images as you review them on your dslr cameras lcd display the lcd screen loupe isolates the display from ambient light so you will not be distracted by reflections or shadows in it this makes it easier to view image details quickly to confirm focus and ensure that you have the best image possible it will provide full coverage of an lcd display screen up to 32 diagonally with a standard 3