Tagged Questions
6
votes
2answers
1k views
How to enable Canon AF with teleconverter?
Canon DSLR bodies prevent poor auto-focus performance by disabling it completely when the lens reports maximum aperture at chosen focal length smaller than f/5.6. This implies that some lenses will ...
3
votes
1answer
248 views
How can a teleconverter allow manual focus lenses to autofocus?
I've found that some discontinued teleconverters, such as the Pentax F 1.7x AF Adapter and Nikon TC16A, enable autofocus with manual focus lenses. How is this possible? Does this system have any ...
