The Tamron lacks a lock to prevent zoom creep, which the Canon has, though it shows no proclivity towards any creep right now. 300mm x 1.6 crop factor = 480mm. Rounded blades, often only found on more expensive lenses, improve the appearance of the out-of-focus areas. Two things here, though, one is you never have enough FL so the idea of the 150-600mm super zoom is very good. Wide open at 300mm there is excellent center sharpness and still very strong edge sharpness. The "Contemporary" edition is about $1000.Tamron's new version (called the "G2") is about $1300. The device is protected with extra seals to prevent failures caused by dust, raindrops, and water splashes.A shorter minimum focal length allows you to get more of the scene in the photo, and offers a wider angle of view than longer focal lengths.A longer maximum focal length allows you to focus in on a small part of a scene, and offers a narrower angle of view than shorter focal lengths.We consider a lower weight better because lighter devices are more comfortable to carry. The first 3 pics (only) in this album were taken with the crop and 70-300mm. A shorter minimum focus distance allows you to get closer to your subject, and is particularly important when doing macro photography.Lenses with a built-in focus motor can autofocus even if the camera does not have its own focus motor.Lenses with built-in focus motor focus faster and more quietly than lenses without a focus motor which rely on the camera's body focus motor.With full-time manual focus, you can move the focus ring whilst it is in AF (autofocus) mode. When it comes to actual autofocus, the performance is amazing, but it (like Canon’s STM technology) leaves a lot to be desired if you want to manually focus.
Another advantage is that with a smaller aperture you get a greater depth of field, and can keep all of the image in focus.A smaller aperture reduces the amount of light reaching the sensor. Not every lens makes the transition to APS-C well, as the cropped sensor can be a little punishing to some full frames lenses, but that didn’t seem to a be a problem here. Opinioni, caratteristiche tecniche e foto scattate con il Canon EF 70-300mm f/4-5.6 IS USM, obiettivo tele per formato FF e APS-C, prodotto dal 2005 al 2016 (fuori produzione). It’s may be debatable how much this will impact you in real world shooting, but obviously I would prefer that the trend was moving in the opposite direction.Here is a chart that shows the range for each aperture value in several competitors. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.Similar to the number of aperture blades, rounded blades affect the way the light gets through to the sensor. Road runners don't move in straight lines and are very difficult to shoot, so for me, framing is the problem. Lens fully zoomed.Not overly exciting I'm afraid. The latter might save a little battery life, though the physical drain of this kind of LCD screen is undoubtedly minimal.It’s nice to see Canon experimenting here, and surely some will find this display useful while others will never look at it at all.
That said, I took some nice photos with it. A 100mm lens would be about 2x so this equates to 6x for a 300mm lens. The Canon exhibits very little chromatic aberrations, with no purple fringing and only a hint of green fringing in the transition to defocus. I use lenses like a photographer will, and my conclusions are always based on real world usage.Read on to discover my findings in the real world with the 70-300 IS II.Canon debuted a new look for its consumer grade zoom lenses with the release of the EF-S 18-135mm IS USM (launched as a new kit lens with the EOS 80D). The 70-300's Nano USM AF system is better/faster than the 55-250's STM system, while the 55-250 has a higher maximum magnification spec (0.31x vs. 0.25x). It is worth noting that even at 12 feet it frames much tighter at 300mm than either of the Canon lenses, which both focus breathe to some extent (the 100-400L II is the worst).