I recently purchased a Lumix 14mm and thought I would do a little comparison at comparable low apertures: around f2.5. This is approximate in that the Computar lens has continuous manual f-stops. All shots using Center-Weighted metering at 1/40 sec. FOV is as noted below. Computar is a fun lens with good center sharpness. Compared to the Lumix, I was surprised that the background is less OOF than the Computar, at same f-stop - even though the latter is a wider lens. Any other thoughts?? Here is the Lumix shot: Uncropped Computar. Note: Vignetting and strong blue fringing around bright edges. 4/3 Cropped Computar. Note: I estimate useable field of view equiv. to 15-16mm lens. 16/9 Cropped Computar. Note: comparable useable horizontal FOV to the Lumix 14mm.