If you notice your Canon digital SLR camera lens has the letters USM written on the side, it means the lens has a small motor built into the body. Hence, USM is short for Ultra Sonic Motor. What this means is that your lens will autofocus faster than standard models. It is important to note that there are two different types of USM lenses.
Resolution is as good as most prime lenses throughout the zoom range. Distortion is low. Focusing is very quick and accurate. If you need the absolute best, then this is what you need. That being said, there are a lot of very good choices in this range: Canon 24-105mm f/4L IS, Canon 24-70mm f/2.8, and the Tamron 24-70mm f/2.8 VC. All of them The 24-70mm f/2.8 II is intended to be a workhorse lens for professional photographers that has to deliver the best possible results in a wide range of conditions. It uses a suitably exotic optical design for this purpose, with 18 elements in 13 groups, including two 2 ultra-low dispersion (UD) glass elements and one Super UD aspheric element The Best Canon Full-Frame General-Purpose DSLR Zoom Lenses. Buy Rent 1. Canon EF 24-70mm f/2.8L II USM Lens. Ultimate Image Quality, Excellent Build Quality, Wide f/2.8 Aperture, Very Fast Autofocus Speed with Precision Accuracy, Weather Sealing
At 70mm the corners are 1.91 stops darker than the image centre at f/2.8 and 2.7 stops darker at 200mm. Visually even illumination is achieved at f/5.6 throughout the zoom range. Distortion at

Test objektivu Canon EF 24-70mm f/2,8 L II USM vs. 24-70mm f/2,8… | FotoAparát.cz přidáno 29. ledna 2017 Objektiv Canon EF 24-70mm f/2,8 L II USM je v tomto rozsahu opticky nejlepší zoom na trhu pro fotoaparáty Canon.

Canon EF 24-70mm f/2.8L USM Specs Zoom lens | Canon EF | 8014A005 Sony a7 IV 12.7% Nikon Z8 3.8% Sony a7CR 2.9% Nikon Zf 2.4% Sony a6700 2.2% Fujifilm X-S20 2 iFsq.
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    • canon ef 24 70mm f 2.8 l ii usm zoom lens