The focal length of 45mm (equivalent to 90mm) is the perfect length for portrait photography, specifically photos taken of a person from the shoulders and above.

extremely small form factor, excellent optics, great focal length for family photos, nice bokeh

The fixed focal length makes it less flexible than a zoom lens, but you can't have everything

Can't add any more than has already been said about this lens but if you like the 90mm focal length this is the lens for micro 4/3.

At 45mm (90mm equivalent in 35mm) the focal length is ideal for portraiture

The recently announced Olympus 75mm would probably be the perfect focal length for me, but unfortunately, I'm not going to be dropping $900 for a m4/3 lens anytime in

I have been shooting a lot more faces and upper bodies than in the past, as I had previously favoured classic focal lengths (35-50 equivalent), which tend to include a subject's environment in the frame

Although it is not a very versatile focal length for me, it is overall one of the most 'obvious' lenses to own for the m43 format, perhaps even more than the PL 25mm/1.4 because it can be had for about $325 at this time, and has no real alternative.

The focal length is excellent for portraits

For candid and posed shots with my friends, it's a fantastic length, and you'll find plenty of things to shoot with it

It's the perfect focal length.

This is a fantastic length for portrait pictures, but can be a little tight as a walk-around, since you have a 2x crop factor on m4/3 bodies

The 90-mm (35-mm-equivalent) focal length is great for portraits, or for getting closer to the action in poorly-lit venues