Excerpt: I use this lens with a Canon 70-300mm lens.The Kenko gives automatic focusing up to about 200mm,but from there to 300mm it does not.One must focus manually in this region-which is no big problem.The teleconverter is well made and has the look of qualityI would recommend it.
Pros: Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Rugged, Strong Construction
Great product in manual focus. Good image quality. I would recommend it.
31 July 2012
Summary: I use this teleconverter with my Nikkor 55-300mm/f4.5-5.6G lens and a D5100 and it works great in manual focus. Don't expect to use AutoFocus with this lens. Image quality is quite good and you can take great shots even with no tripod if you are careful. I think this teleconverter is a great alternative solution for waiting to have money to buy a more powerful zoom lens.
Excerpt: I have excellent results with this converter using my Nikon 300 f4 lens, even hand held most of the time. I shoot with a Nikon D3s so I do push the ISO up to keep my shutter speeds over 600. Technique is key with this combo. It doesn't work with my 80-400 over 300mm zoom. The auto focus gets confused on what you're trying to focus on and it also gets to distorted.
Pros: Consistent Output, Fast / accurate auto-focus
Summary: If it works; it works! This Teleconverter is a great alternative to the Nikon Brand. The Autofocus is reasonably quick and it's sharpness is SPOT ON! Paired with my Nikon 80-200mm AF-D two ring, it extends my reach up to (300mm FX) and (420mm DX)!!! The Extra reach especially on Cropped Sensor SLRS is a BEAUTY!!! It lets me get in there nice and tight without being intrusive to the subject in front. The Teleconverter is made from very strong metal and plastic materials.
Summary: I am using this with a Nikon 80-200 F2.8 AF-D which makes the lens a 160-400 F5.6 and I have no complaints. I wish Nikon had and auto focus teleconverter that fits this lens, but all their new teleconverters are for AF-S lenses.
Conclusion: j'ai pu réaliser quelques jolies photos d'un pivert qui me taquinait et que je n'arrivais pas à approcher dommage qu'on perde l'AF mais les réglages manuels ne sont pas trop compliqués et donnent de bons résultats