Review on Sigma AF 150mm f/2.8 EX DG OS HSM APO Macro Canon EF Lens by Haruto Asahi ᠌

>First impressions of this lens on the 7D and 5D3 cameras were good. Surprisingly, neither back nor front focus was observed. However, in the future, with painstaking work, it was noticed that adjustment is required. On the first of these cameras, an input of minus 2 divisions was required, on the second - by plus 2. It is also worth noting that in some cases there is a certain offset - misses, but not more than the depth of field, which is visible only at high magnifications. > A significant negative point was the work of autofocus on 7D, when instead of focusing on the central point (whole or its middle part), there were attempts to focus on the entire field or on the central group of points. In the latter cases, the lens was focused, but did not get into sharpness, which was sometimes even observed immediately in the viewfinder (!). No key switching on the lens changed the matter. To "justify" the camera's serviceability, a more "thin, delicate and elegant" Sigma 50 / 1.4 Art was installed, which was perfectly focused both on the central group of points and across the entire field. On the 5D3, the lens focused flawlessly. > Focusing speed on 7D seemed faster, however, still not as fast as we would like. On the 5D3, focusing occurs after some "thoughtfulness". The image stabilizer is "slow-thinking": it takes some time before it "freezes" the image. On 7D this time is less. With good hands with the 5D3 camera, you can get an acceptable image even at 1/10 s, if you do not make large magnifications. But high-quality work is visible somewhere from the level of 1/25 - 1/30 s, respectively, with the actual macro photography (M1: 1 - 1: 2), you should not allow shutter speeds longer than 1/60. > Surprisingly, this lens has bokeh, and not the worst. I drew attention to it even in the viewfinder in the first moments of communication with this device. The angle of view of the lens is 16 degrees, which is slightly less than 18 for classic 135mm portrait cameras. DOF at f/2.8 is very small when shooting a facial portrait, so you shouldn't be afraid of skin imperfections. The Samyang 135/2 is no less sharp, and so is the Canon 135/2 L. Technically, the picture is quite normal, I did not find anything that would cause "ah" or "fu".