Sony SEL50F18 tearing down and cleaning

steps for cleaning : 1. remove the plastic ring(where written: E1.8/50 OSS) from the barrel side by a sharp edge to avoid scratching the glass.In the E50 it is glued while it is threaded type in the Kit Lens. 2. remove the 3 silver screws and take out the filter mount.between the filter mount and first element you will find the two rubber bands(see the image),reinstall it in place when assembling again. if the rubber band is cut as shown below, nothing to worry about. 3. remove the upper 3 black screws, and take off the plastic ring with the first element. 3 pair of stainless steel parts (below the srews of the first element) will fall. blow the rear side of the first element and the front of the second element by a rocket blower. 4. reinstall all parts removed. N.B: reinstall the 6 stainless steel parts in it place (2 below each screw). IMO these are used for front element adjustment. regards, Credit: https://www.dpreview.com/forums/threa... music: https://www.chosic.com/