I am thinking very hard about reasons for and against buying the new Olympus 75mm f1.8 lens for Micro 4/3 cameras (like my Panasonic Lumix DMC-G3). Having shot with my Voigtlander 75mm f2.5 lens in Leica Thread Mount on the G3 recently, I'm pretty convinced the focal length is what I need for music photography.
(Click Here) to see my concert pics with the G3 and Voigtlander 75mm f2.5 Color-Heliar.
Because the new Olympus lens is so fast (in light gathering, f1.8), I wondered if the depth of field at that f-stop would be so shallow as to not be useful for portraits and people pictures. Depth of field is reasonable on my Voigtlander lens at f2.5, but what about f1.8? Well, ePhotoZine's picture above answers that question. It seems to have just the right amount of depth of field at f1.8.
It doesn't look good for me talking myself out of the new Olympus lens. :)