Extending a lenses focal length by a factor of 1.4x, Extender
EF 1.4X III inco..
Designed to extend a lenses focal length by a factor of 2x,
the redesigned Canon E..
The result of using extension tubes is that the distance from the back of the lens to the film surfa..
These close-up accessories are placed between the camera body
and lens to enable h..