I have had this teleconverter for several years. It does work, however as others have mentioned, autofocus is troublesome. Every auto-focus lens I have tried will endlessly hunt if your in medium to low light situation and you ultimately have to manually focus. Previous reviews have explained "why" it happens, however it also slows down an otherwise fast autofocus lens in bright daylight which limits its use. One thing I did notice is if you get everything just "right" the images still are not as sharp.
I would recommend using a different name-brand teleconverter.
(7 customers reviews)
Customers Rating=2.5 / 5.0
More Detail For Bower MC4 2x AF teleconverter
- 2x autofocus teleconverter/extender for Canon EF lens system
- Magnification: 2x
- Optical Construction: 4 elements in 4 groups
- Fully Multi-coated, automatic diaphragm coupling
- Made in Japan, Lifetime Garantee
