At 70mm the 24-70 f/4 IS shows even more strength, sharper in the center and off-axis, and with less astigmatism. Tamron 24-70mm f/2.8 Di VC USD. The Tamron gives you a f/2.8 aperture option along with similar Vibration Control at a similar price point to the Canon 24-105mm, but again you give up the extra range. These Canon lens filter size charts list the lens diameters for Canon RF, EF, EF-M, and EF-S lenses. EF 24-70mm f/4L IS USM: 77mm: This site is where I test The Canon company has always tried to offer standard, fast, professional zoom lenses. In 1993 the EF 28-70 mm f/2.8L USM was launched and in 2002 it was substituted by the EF 24–70 mm f/2.8L USM. As you can see there were nine years of difference between those two – small wonder near 2010-2011 rumours were circulating about the next successor. EIQT.