2x reach with top optics and operation A 2x teleconverter that maintains full G Master performance. Extends focal length of lens by 2.0x Increase focal length without degrading resolution A handy tool for minimising gear Compatible with a range of lenses Compact alternative to bulky additional lenses Double your focal length Multiplies the focal length of the lens used by 2x without degrading optical performance, AF speed and precision, or operability. Light loss with the teleconverter is approximately 2 stops. 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 SEL20TC teleconverter is compatible with the following lenses: SEL70200GM, SEL100400GM What's In The Box : Case Lens Specifications MOUNT Sony E-mount FORMAT 35 mm full-frame LENS GROUPS / ELEMENTS 5/8 COMPATIBLE LENS SEL70200GM, SEL100400GM Size & Weight DIMENSIONS (DIAMETER X LENGTH) 62.4 x 42.7 mm WEIGHT 207 g ; ;