If you shoot raw data and then use non-manufacturer software to process that data into images then there is the possibility that there might be some. Importantly, the lens is fully compatible with the "Direct Manual Focus (DMF)" system feature of Sony cameras that enables the user to instantly switch between autofocus and manual focus.

The Tamron 28-75mm F2.8 Di III VXD G2 is a standard zoom lens for Sony's range of Alpha 35mm full-frame mirrorless cameras. My sample was much softer on the right side than the left, a sign of relaxed manufacturing tolerances. The Nikon Z 28-75mm f/2.8 has no visible distortion as shot with the default distortion correction activated. The Sony 28-75mm f/2.8 is mostly plastic, except for the mount and glass. It feels OK; its the noisy AF system that creeps me out the most.

Tamron 28-75mm F/2.8 Di III VXD G2 Aperture range

Bokeh is a word used for the out-of-focus areas of a photograph, and is usually described in qualitative terms, such as smooth / creamy / harsh etc. This new Z 28-75mm f/2.8 is a more practical, lighter weight, closer-focussing and much less expensive improvement to the bloated old Z 24-70/2.8. The Z 24-70/2.8 remains very popular, but it costs over twice as much, can't focus as close and is much bigger and heavier — but tougher if you enjoy abusing your equipment. Neither has Image Stabilization (more at Compared). I will admit that the Sony may out perform it in different ways but I cannot imagine it to be “twice the price” worth of difference. To connect your PC and lens, use the TAMRON Connection Cable (USB Type-A to Type-C/ Model CC-150, or USB Type-C to Type-C/ Model CC-350) sold separately. The lens coatings are effective and flare is minimised extremely effectively. It is possible to generate some mild artefacts but it needs very harsh and deliberately directed lighting to do so.

As soon as you stop down or stop wasting your time looking for details in the far corners where it doesn't matter at maximum aperture, they're all the same and I really prefer being about to get to 120mm rather than 75mm. I know; I've shot them all and aren't trying to sell you anything, but we all have different priorities. Amateurs worry themselves silly about lens sharpness, but that's the last thing on your mind after you've got over five decades of shooting behind you. The other brand new feature is the USB-C Connector Port, which allows you to update and customise the lens directly using the TAMRON Lens Utility software, rather than via a camera body. It’s not unusual for standard zoom lenses to exhibit barrel distortion at their widest setting. This zoom is no exception and our tests reveals prominent barrel distortion, whereby straight lines bow outwards towards the edge of the frame. By the time you reach 50mm barrel distortion turns to pincushion distortion. This becomes obvious in shots taken of straight lines and is accentuated slightly more at the furthest point in the zoom range. Tamron 28-75mm f/2.8 Di III RXD review: Verdict Personally I find that the Tamron 28-75mm f/2.8 has an optimum level of sharpness between f/4 and f/5.6, but I still tend to use it mostly at f/2.8-f/3.5 for some reason that I cannot explain. While you can use it on a smaller APS-C body like the Sony A6000 series of cameras, it won't balance particularly well and the equivalent focal length will also change to 42-112.5mm.From 50-75mm you’ll start to notice some pin cushioning going on, but I never found it too prevalent or a problem on any of my photos.