Sigma 17-50mm f/2.8 EX DC OS HSM Zoom Lens for Canon w/A{S-C Sensor #583101 + 77mm 3 Piece Filter Kit + Lens Pen Cleaner + Fibercloth + Lens Capkeeper + Deluxe Cleaning Kit + Flexible Tripod Bundle

hello everyone in this video I show you how to clean the inside of Sigma 17 to 50 millimeter F 2.80 s Lance recently I had this lens which had dust inside I had to remove the front lens element clean the lens inside there are some models in this video I show you how I did that as you zoom in and out the last collects dust inside mostly the dust is between the front lance and 2nd mass element fortunately it is very easy to remove different lens so complete disassembly is not required so in this video I show you how to remove the front lines clean the lens inside and then assemble the lens before I will start let me talk about tools and type use to clean the lens for this assembly and assembly I will use a pH 3-0 screwdriver a plastic spudger a metal tweezers a suction cup and the permanent marker for cleaning the lens I'll use an air pump a brush microfiber cloth and lens cleaning fluid