Last week I had no activity and stay at home nothing to do. Got an Idea to do some cleaning for my lens, the lens had long time without service. Start from blower procedure till end. The final result kind a worst, because it still remain dust in lens. Used macro precision tools to unscrew the lens, and the lens is open up. For Sigma 24-70 F2.8 EX DG Macro, I can open the bottom and the electronic contact only. The Canon EF 50MM F1.8 MKII unscrews to remove all the part Yes I’m done it. This lens I got no more warranty, so I can do what I want at my own risk. There is some picture during lens repairing and servicing.
Isometric view of Canon EF 50MM F1.8 MKII.
The plan view of Canon EF 50MM F1.8 MKII. As you can see here, a ribbon cable and a kind of MicroController.
This is Sigma 24-70 F2.8 EX DG Macro. The lens is too pack with mechanical and electronic circuit. I only cleaned the bottom of this lens, cant remove to much part because this lens is still under warranty.
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