The exit pupil is the diameter of the light image visible through the eyepiece. The exit pupil is calculated by dividing the objective lens diameter by the magnification factor. This model offers a 5mm exit pupil, making this model an ideal choice for both low-light (dawn, dusk, dense tree cover or night sky) and daylight viewing.

Large Lenses produce needle-sharp, razor-dimensional images of brilliant quality. The 8×40 offers a Porro Prism design that is simpler and more light efficient producing vivid, 3-D Images with excellent depth of field.

The 8 x 40 offers Bak-7 lens system. High-grade optical components. The key criterion for excellent sharpness, contrast and light intensity is the quality of the prisms and lenses. Olympus lenses are a world-renowned trademark and synonymous with optical precision.