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This teleconverter allows you to increase x2 times the focal length of your lens. I purchased the Nikon mount variation, as I am a Nikon user. The image quality is no better than the lens quality you are using it with. That is, you will not notice much loss on the image quality, but you will double the f/stops your lens is capable of. Example: In my case, an f/4 to 5.6 55-200mm lens was used, the teleconverter went from f/8 to 11 and focal length was doubled 110-400mm. The f/ stops lost are the trade off. Also, please note you must visit Kenko's website in order to check if your lens will be compatible. In most cases, the teleconverter coupled with the lens will work fine in manual focus mode, so this unit is not very indicated if you are expecting quick shots on wildlife, sports or spotting. On static or slow moving subjects it will be best suited for the combination. I have used this for spotting aircraft and am happy with it.Read full review
Verified purchase: Yes | Condition: New
I received this today. Nicely packed, well protected with lots of bubble wrap etc. Original box with easy to understand short instruction booklet. I was a little skeptical whether or not this would work on my Nikor 55-300mm AF telephoto lens but when I tried it I had no real issue getting it ro work fine. Even the AF worked, but it did take a few seconds to get the focus right, and on a couple of shots I simply went to manual focus...no problem. The Nikon Vibration Reduction still works 100%, and I have only noticed a slight segregation in picture quality and brightness, but I am sure with a little adjustments to iso and whatever else my new D3300 can do the pics will be fine. All up, I am happy with this product. I tried it today on a few very distant television towers onto of mountains and it certainly brought them closer than without it. Since spending thousands on a 600mm lens is beyond me this made a great compromise :) Happy customer..Read full review
Verified purchase: Yes | Condition: New
Good quality construction. Very happy with the images produced but need to use manual focus most of the time due to auto focus continually hunting and not locking in. However, considering the huge difference in price between the Kenko and Nikon versions, needing to use manual focusing is a small price to pay.
Verified purchase: Yes | Condition: New
Image quality seems to be quite good but AF speed pretty poor. Big AF performance drop with lens with an f/4 aperture rather than f/2.8. AF performance degrades with lower light levels and viewfinder noticeably darkens. It is good value if AF performance is not an issue. Sharper than expected.
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
