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Focal Length & Maximum Aperture
Diagonal Angle of View
Closest Focusing Distance
Max. Diameter x Length, Weight
Compatible Supplies & Accessories
Canon offers a wide range of compatible supplies and accessories that can enhance your user experience with you EF 40mm f/2.8 STM that you can purchase direct. Scroll down to easily select items to add to your shopping cart for a faster, easier checkout. Visit the Canon Online Store
52mm Circular Polarizer PL-CB
Filter enhances picture quality by blocking harmful reflected light.
Lens Cap E-52 II
Lens Cap for lenses with a 52mm filter diameter.
Lens Hood ES-52
Designed to prevent stray light from entering the lens in order to keep unwanted glare from affecting your photographs.
A Modulation Transfer Function (MTF) chart measures a lens’ expected optical performance at the center of the picture area and measures repeatedly along the diagonal line, further and further toward the corners of the image. The higher a curve is shown on the chart, the better the lens is performing in the area the chart is measuring. As a curve moves from left to right, it displays the lens' results from center towards the corners.
For more information on understanding how to read Canon Lens MTF charts, please click here.
Canon EF 101: Series OverviewCanon offers a wide range of EF lenses and lens accessories. In this 9 part video series you'll learn all about lens basics and the various lenses available from your host, Canon expert Jon Lorentz.
Canon EF 101: Lens BasicsTake a quick and informative first step into the world of lenses with Canon expert Jon Lorentz, providing insight into the type of lenses available, helpful tips and more.
Canon EF 101: STM LensesCanon STM lenses have stepping motors that allow you to focus quietly and follow your subject smoothly. Canon expert Jon Lorentz demonstrates the quiet smoothness of Canon's STM technology.
Canon EF 101: Telephoto LensesTelephoto lenses let you get close in on a subject. Canon expert Jon Lorentz shows you how to get the most out of your Canon telephoto lenses.
Canon EF 101: Lens AccessoriesCanon expert Jon Lorentz takes a look at some lens accessories including lens hoods, filters, extenders and more and how to care for them.
† Prices and specifications subject to change without notice. Actual prices are determined by individual dealers and may vary.