The Sony FE 100-400mm F4.5-5.6 GM OSS is a telephoto lens compatible only with cameras of the same FF and APSC size brand. The focus is automatic and takes place via AF non -ultrasound engine while image stabilization is present both in the lens and in the camera. The recovery angle ranges from 24.4 to 6.2 degrees based on the focal length used and the minimum focus distance is slightly less than the meter. The speaker is supplied as well as the clockboard on TRIGUPHEDS. Weight and size are lower than the average and guarantee comfortable use even for long periods. The materials are of excellent quality, capable of resisting very well in time and resisting impacts. The images captured with this complaint are of great quality, extremely sharp and with perfect colors. There are no chromatic aberrations or distortions (also due to the opening of reduced field) and the minimum fire distance is optimal for many photographic genres. The Sony FE 100-400mm F4.5-5.6 GM OSS is a high performance lens, capable of giving excellent images, it is also a very versatile and easy to use lens thanks to the various aids that make it fast and precise. It can be used by both professionals and amateurs and focal distances are excellent for naturalistic photography. The cost is quite high but the investment is certainly rewarded by the quality of the images.