Olympus used to manufacture a lot of great 50s. There's of course 50/1.4, but also a nice 55/1.2, which was slightly radioactive. Well, some of them, but those are highly collectible and therefore pricey right now.
However, I like my 50/1.8 and all the effects I can with it.
Taken from the same place, with same settings, but focused at different distance
Zuiko 50/1.8 is a compact, rather light lens. Significantly smaller than most of "digital" 50s designed for DSLRs. If you don't need an autofocus standard, this is a good choice to keep in your bag.
Olympus Zuiko MC 50 mm 1.8
Camera: Lumix G2
Aperture: all photos were taken with aperture F1.8
Mount: M4/3 > 4/3 > OM
Edit: PS CS6 50% scaling
|Olympus Zuiko 50/1.8 against the sun. Maybe a little less sharp then usually.|
|It is possible to isolate an object from its background.|
|Here you can see how easy it is to get out of focus. There's only a sweet spot focused properly @1.8.|
|Light on a tree comes from window reflection.|
|Lens flare! Not as pretty as in Vivitar 28/2.8 OM.|
Finally aperture test. There are seven positions on aperture ring and no "halfs". Please, mind that it was a rather windy day, so F1.8 is a bit unfocused and F16 is slightly moved.
|Olympus Zuiko 50 mm 1.8 @1.8|
|Olympus Zuiko 50 mm 1.8 @2.8|
|Olympus Zuiko 50 mm 1.8 @4.0|
|Olympus Zuiko 50 mm 1.8 @5.6|
|Olympus Zuiko 50 mm 1.8 @8.0|
|Olympus Zuiko 50 mm 1.8 @11.0|
|Olympus Zuiko 50 mm 1.8 @16.0|