The Sony FE 70-200mm f/4 G OSS II is the long-awaited successor to the classic 70-200mm f/4 released over 9 years ago (at the time of this writing). Here are the exciting upgrades you can expect from this E mount telephoto zoom:

• Introduction of a floating focusing element to give this telephoto a .5x half-macro magnification across the entire zoom range. This element also improves corner-to-corner sharpenss. Focus as close as 10.2" when shooting at 70mm.
• Video-optimized AF system with 4 XD linear motors, which results in 20% faster focusing performance to support accurate tracking while zooming. This also means full compatibility with blackout-free 30 FPS continuous shooting speeds, like that found in the a1. Additionally, the focus is near-silent and offers reduced breathing and focus shifting. 
• Both length and weight are reduced by about 15%. Front heaviness in particular has been reduced, alleviating strain both when focusing and on the mount.
• Compatibility with the 1.4x and 2x teleconverters, resulting in 98-280mm f/5.6 and 140-400mm f/8 effective ranges, respectively. Adding teleconverts also unlocks 1:1 magnification across the entire zoom range (teleconverters are not included).
• 3 focus hold buttons for assigning to preferred key settings. 
• 3-mode Optical Image Stabilization that works in tandem with the stabilization built into select cameras. 
• Dust and moisture resistance.

The Sony FE 70-200mm f/4 G OSS II is a great choice for capturing both distant wildlife and small details while out in the field. It also is a good choice for product photography and hybrid photo/video projects. Please note that this lens does not zoom internally. It has a rotary/extending design.