The 70-300mmm G lens is the longest telephoto lens you can currently find for Sony APS-C and full-frame mirrorless cameras. This may not be the case for long, however, as Sony is committed to releasing more lenses for the E-mount system and rumors about a possible 100-400mm have already surfaced. Either way, a 70-300mm lens is a must-have zoom in every interchangeable camera system so let’s have a look at how good the Sony version is.