I've had my OM10 for just about a month now and love it so I wanted to get another lens to enable me to tackle most of the pictures I'd like.
This is a moderate telephoto lens ideal for taking detail shots of buildings, relatively close wildlife or say stacked views of mountains.
This is the F 3.5 version that offers same sharpness as its heavier F2.8 version and thanks to the bright viewfinder, the slight drop in lens speed isn't noticed and takes a 49mm filter thread that is the same as the 28 and 50mm lenses which helps when it comes to using polarizers and filters.
It is very sharp.