Sony 1.4X SEL14TC

(From Sony literature)

Extend your range by 1.4x
Multiplies the focal length of the lens used by 1.4x without degrading optical performance, AF speed and precision, or operability. Light loss with the teleconverter is approximately 1 stop. An ideal way to extend available focal length range for sports or wildlife photography without having to carry additional large, heavy lenses.

Compatible lenses
The SEL14TC teleconverter is compatible with the following lenses: SEL70200GM, SEL100400GM.