The second generation (hence ‘G2’) of Tamron’s SP 150-600mm F5-6.3 Di VC USD ultra-telephoto zoom lens makes an attractive lens even better. The speed and accuracy of the autofocus system have been improved, as has the effectiveness of the built-in VC (Vibration Compensation) system. A ‘Flex Zoom Lock’ mechanism keeps the lens barrel fixed at any chosen focal length. The fluorine coating and moisture-resistant construction make the lens less vulnerable to dirt, dust and moisture. The optional TAP-in Console allows the owner to easily update the firmware as well as customise features including fine adjustments to the autofocus and vibration compensation.