I've had the Panasonic 20mm on my E-Pl3 for nearly 2 months, and was getting really tempted by the Olympus 45 mm to give me a longer lens. Decided to put the thought on hold and get an adapter for my M42 Takumar lenses, which range from 28mm to 200 mm. The Fotodiox adapter arrived today and - - it was all so easy. The focus zoom makes manual focusing a snap. I am still hoping the Olympus 45 mm will be issued in black, so I will hold off. Nice to have increased my lens selection in the meantime.