This Stand Loupe 8x with Neck String from Peak is specially designed to cover the entire 24 x 36mm area of 35mm film frames. This high-grade magnifier has a 24 x 37mm angular object lens. The bottom part of the skirt is engraved with a 30mm long, 1mm pitch scale. It can be used without obstructing the field of view. The included neck strap assures you'll always have the loupe handy when needed.