I love this product. Never had an issue with focus. With all the photo retouching software out there its no problem if you loose 1 f stop. Just make sure you use a mono pod or tripod and there is no problem.

This product exceeded my expectations. It is very well built and works well with all Zuiko lenses I have. (50mm, 12-60mm, 50-200mm 70-300mm).
In certain low light conditions, naturally, auto focus is problematic, but also depends on the equipment used. It works perfectly with fixed aperture lenses, placing the camera in the form of priority in the opening, as the 500mm mirror lens I have. Perhaps it is expensive but gave a new spin on how to use my lenses. The new depth of field that allows me with my old lenses, it is very interesting.

I've had this converter for two years now and have found it very useful for zoo and wildlife photography.

This trick to this teleconverter is that you need bright light because of the loss of stops. I use it with my 50-200mm and find shots in bright light to be crisp and sharp even handheld. However, when the light is not good the shots can be soft. This is why I did not give it 5 stars. Overall, it's a great deal for long range photography.

Whatever the lense used, AF not working properly. Require focusing manually...

No matter what lens I use I can not get a in focus shot at all.
Using tripod make no difference