Adapting a 25mm f/1.4 C-Mount CCTV Lens for Micro Four Thirds
Cheap 25mm f/1.4 C-mount CCTV lenses produce gorgeous, Petzval-like swirly bokeh on Micro Four Thirds sensors—if you can get the rear element close enough to focus to infinity. When a standard C-mount adapter wouldn't seat deep enough, the solution was taking a hacksaw to the lens barrel, filing down the rear shroud, and epoxying the optics directly into a recessed mount for the Olympus E-PL1.