The Fujifilm XF 18-135mm F3.5-5.6 is a weather-resistant lens designed as a companion to the weather-resistant Fujifilm X-T1. Covering a 27-200mm equivalent range, it claims to offer the world's most advanced image stabilization system, using gyro sensors for a gain of up to five stops. Is it the ideal pair for the X-T1? We took it out for a spin. Take a look at how it fared in the field.