Pentax DA 40mm f2.8 XS smc Filter Size_52mm Canon 17-40/4L USM

Canon 17-40/4L USM

Kenko's Auto Focus extension tubes are designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with most Nikon lenses given there is enough light to activate the cameras AF system properly

This adapter is equipped with an integrated aperture control ring and can also be used with lenses that do not use a manual aperture control ring

With special lens coatings

Pentax DA 40mm f2.8 XS smc Filter Size_52mm Canon 17-40/4L USMThis ultra thin 40mm prime lens (equivalent to 61mm in the 35mm format) measures a mere 9. 2 millimeters in length and weighs just 52g. Its maximum aperture of F2. 8 produces sharp, bright images in a wide range of applications, including snapshots, scenic photos, portraits, and even incident light indoor shooting. Nine rounded aperture blades produce extraordinarily smooth, natural bokeh. PENTAX Super Protect (SP) coating on the lens surface helps