Canon RF 24-70mm f/2.8L USM (1/50 sec, f/2.8, ISO160) (Image credit: Future) In our time with the Canon RF 24-70mm f/2.8L IS USM, it performed like an amped-up version of the EF equivalent – in particular, focus seemed snappier, thanks no doubt to the improved capabilities of the EOS R system and the faster communication enabled by the RF mount. Canon EF 24-70mm f/2.8 L II USM Lens. The same lenses are shown below in their fully extended states with their lens hoods in place. If you do not need an f/2.8 max aperture, the Canon 24-70 f/4 L IS and 24-105 L IS lenses are worth considering. The 24-105 costs less than the 24-70 VC and has a longer focal length range. The modestly more Construction. The Canon EF 24-70mm f/4L IS USM is built as you would expect from a Canon L lens. It is like a tank. Yet, this lens (weighing 600 grams) is lighter than its Canon counterparts. The revised design focuses on ease of use. The exterior has a high-quality coating with a leather structure. Review manufacturer specifications and detailed lab measurements for the Canon EF 24-70mm f/4L IS USM Lens. Compare the specs and measurements of this lens with other lenses. The 24-105mm ($649.00 at Walmart) measures 4.1 by 3.3 inches (HD), weighs about 1.2 pounds, and uses 77mm from filters. It's noticeably lighter than the EF 24-105mm f/4L IS USM ($1,149) zoom (4.2 The Canon EF 28-135mm f/3.5-5.6 IS USM Lens vignettes very strongly at 28mm with a wide open aperture. Wide open vignetting gradually decreases to a mild amount at 100mm with a slight increase again at 135mm. Users of 1.6x FOVCF bodies will notice much less vignetting - mostly in the corners below 35mm. The f/2.8L II is slightly larger than the 24-105mm f/4L IS, which is slightly larger than the 24-70mm f/4L IS. The f/2.8L II has a modestly more substantial lead in the weight category, weighing in 5 oz (142g) more than the 24-105mm f/4L and 7 oz (198g) heavier than the 24-70mm f/4L. These lenses are similarly well-built. The full-frame EF 24–70mm f/4L IS USM ($1,399, street) is Canon’s first in this popular focal-length range to have an image stabilizer. Unveiled in late 2012, it boasts two expensive UD glass elements, an internal focusing design, a nonrotating barrel, and a reversible hood with a push-button locking mechanism. 7lDCB.