Lens hood is reversible. Canon EF 70-200mm f/4L IS II USM. Canon RF 70-200mm f/4 L IS USM. The lens hood can screw onto the lens in reverse so that you can keep it on your camera at all times, ready to use. filter size. 80mm. 83.5mm. This measurement is important to take into account when buying filters.
Has a metal mount. Canon EF 24-70mm F/2.8L II USM. Canon EF-S 18-135mm F/3.5-5.6 IS STM. A metal mount is generally superior to a plastic mount as it is more durable. weight. 805g. 480g. We consider a lower weight better because lighter devices are more comfortable to carry.Re: Canon 24-70 f/2.8 vs Tamron/Sigma. Someone was nice enough to post a lot of controlled test shots of these which I replied to. The Sigma shaded it for me only at 50mm by a small amount but the Canon is generally a bit sharper than the rest at other focal lengths wide open. The Sigma needs to be stopped down to look good on the edges at 24mm
Also the Canon 24-70 2.8 II is way out of my budget. For the Sigma 24-70 F2.8 has not so good reviews (especially regarding sharpness at 2.8). So I would think that this can be left outside of the 3. What I'm most interested is the comparison between the Canon 24-70 F4 and the Sigma 24-105 F4.