![]() So, for example, at a distance of 25 feet, at F6.3, you have got a 0.43 foot zone of sharpness, and at 600mm you’ve only got a 0.19 foot zone of sharpness. And with any lens, when you are the max possible aperture for a given focal length, that allows for the fastest shutter speeds for stopping motion, which is a necessity with many types of long lens photography styles such as sports and birding. When it comes to super telephoto lenses, I’ve long been of the belief that one of the most critical aspects is the max aperture sharpness when fully zoomed-both because you choose a long lens based on that maximum reach focal length, and because with a variable aperture lens design, you trade off some light gathering gathering power in exchange for a more compact design. But for me, for half-sized soccer fields and 60 foot ballfields, the 100-400mm on a full frame or crop sensor camera is the way to go to shave weight with great reach-and on a crop sensor camera, I’d probably find myself racking back to 300mm rather than pinning it at 400mm.įully Zoomed Sharpness of the 100-400mm F5-6.3 DG OS HSM | C Versus the 150-600mm F5-6.3 DG OS HSM | C 900mm reach is too tight for many youth sport situations, and even for collegiate and pro sports in many circumstances.įor first grade youth soccer on half-sized fields, I found myself grabbing the 100-400mm to pair with a full frame 6D each week instead of the 150-600mm, both for the focal range and lighter weight- and I’m a huge fan of the total portability of the 150-600mm | C as you can read here. In general for birding, more reach is almost always desired, but in many situations, such as sports, it is possible to be “overlensed”. ![]() For telephoto work, I generally stick to the center or center cluster of AF points, and always employ the back-button focus technique, and that’s how all the photos showcased in this piece were captured. ![]() Mind you, the 150-600mm is no slouch in terms of AF speed and accuracy, either. Straight out of the box, the autofocus of the 100-400mm | C feels a little more zippy and swift in focus acquisition, and when paired with judicious use of the focus limiters, is blazingly fast, and even more so when the lens is customized to speed-priority AF with the USB Dock and SIGMA Optimization Pro. Both lenses are capable of extending the barrel either with the zoom ring, or with a push-pull of the front element group, although with the 100-400mm, it is a much easier operation when the lens hood is mounted. Ease of use and portability is a key design tenet of the Contemporary line, and both lenses feel solid and well damped. In the hand, both lenses feel similar, dressed in the fit and finish of the Contemporary line.
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