The Panasonic Wide-Angle Converter (DMW-GWC1) gives me 11mm on my 14 for real estate work when I don't have the patience to defish. I thought that since I have the fisheye anyway that buying the 12-32 would let me sell both the 14 + the converter. But, the 11mm is noticeably wider than 12mm for real estate work. I keep meaning to compare the 12-32's sharpness @14mm to the 14/2.5; or @12mm vs the 14 + the GWC1. And I want compare its 14-32 range vs the O14-42. Those are all to come, I guess. Vignetting is so bad with a normal 37-46 step-up ring that it's useless. But, if you can fashion some sort of connector (electrician's tape!) then at 16:9 the 12-32mm + GWC1 gives a very respectable appx 9.5mm FL. 12-32 @ 14mm 12-32 @ 12mm 12-32 @ 12mm with 0.79x GWC1 wide angle converter Rokfish 7.5mm f3.5 shot from a totally useless position before living room was changed around Advice to self: sell 14 + GWC1 and learn to defish!