Thanks to a new LSI drive circuit, the Sony SAL70400G2 lens offers faster, more accurate autofocusing with four times (TBD) faster object tracking performance than the current 70-400mm F4 5.6 G SSM lens. The SSM (Super Sonic Wave Motor) takes advantage of piezoelectric elementsthat change shape when voltage is applied to deliver ideal lens attributes such as a large rotational distance at low speeds and swift start/stop response. The smooth, high-speed performance contributes to excellent response when shooting moving subjects.
Sony's Nano AR Coating with nano-precision structure contributes to high-quality images with reduced ghosting and flare. This proprietary Sony coating technology features aligned microscopic asperities that reduce the effects of the reflective interfacial boundary on the surface of the lens, thus dramatically reducing the amount of undesirable reflections entering the lens.
The Sony 70-400mm F4-5.6 is commonly used for Wildlife photos and more.One reason why the Sony 70-400mm F4-5.6 is popular is because of its Fast / accurate auto-focus
Reviewed by 4 customers
Bought this lens to replace an 80-200 f2.8 and 300mm f2.8 from my film days and to complement my Sony SAL 16-50 so that with these two lenses I can travel much lighter than previously. I wanted the extra reach of the 400mm end and the tripod collar so did not opt for the lighter 70-300. I received the lens a few days before a winter trip to Colorado and hoped I would be able to get familiar with it quickly. I do shoot the occasional bird or wildlife image but I use the lens primarily for landscape work and extracting compositions from larger scenics. I also plan to use it to shoot butterflies and dragonflies in our garden. It is used on A77 and A700 bodies. I'm very impressed with the build quality and fit and finish of the lens. My trip included stops at Great Sand Dunes, Black Canyon of the Gunnison and Rocky Mountain national parks. The temperature was consistently below freezing at all three places and well below zero in the mountains at sunrise above 11,000 feet. Despite the lack of weather sealing I had no issues with the blowing sand of the dunes or the blowing and falling snow in the mountains. The tripod collar allows quick transitions from portrait to landscape orientation and because I do use a polarizer for most of my outdoor work I found the window in the hood allowing access to the filter rim to be extremely useful. The hood itself is light and I might question its long term durability but it fits securely and clicks in place assertively. This lens and my 16-50 are the first lenses I've had with the SSM focusing motor/system and I'm blown away by its speed and silent operation. I'm very much looking forward to using it on butterflies in the spring. This is a heavy lens but no more than I expected and still considerably lighter than my 300. My only mild complaint is the lack of a zoom lock like the one on the 16-50. I often carry the tripod mounted rig over my shoulder and with the lens pointed down it will zoom all the way out. Because of that I would rate it 4.95 instead of a perfect 5 stars but do highly recommend this lens. Will review its butterfly performance once the opportunity presents itself.
Pros: Very fast and decisive focusing. Much less hunting in low light. Color is better but the hood could have been black and sturdier like the 70-200G. Cons: First Copy was decentered and soft. I have an exception G1 copy and this one was obviously broken. Second copy has slight decentering, and was slightly softer than the G1 (only noticeable in fine details such as fur at high mag.) but focus accuracy (front/back focused) at various distance was an issue. This not an issue with the G1 copy I have. I must say, this is the only Sony lens I have had this much bad luck with out of 15. Adorama No hassle return and exchange was awesome!
For the last four years I have been using the original Sony G Series 70-400mm F4-5.6 SSM Super Telephoto Lens for bird photography. This lens had excellent optics that produces high resolution images. The major drawback to that lens is that it is relatively slow in attaining focus. Six months ago, Sony came out with an update to that lens, called the G II Series. Optically, there is a small improvement in the coating. However the focusing speed has increased by a factor of four! That is terrific! I can point to a bird in flight and if is in the viewfinder, I know that it will be in focus. I am delighted with this product. For me, it was well worth the upgrade.
SUPER FAST FOCUSING AND SHARP IMAGES EVEN AT 400mm, USED ON AN A77 SLT,