
I've been waiting for the Panasonic micro-4/3rds Lumix 20mm f/1.7 lens to become available since I got my Olympus E-P1 back in July.

(See blog entry
here.)
I prefer the grey Lumix 20 (
shown on the left with UV filter attached) to the standard Olympus collapsible zoom (14-42mm f/3.5-5.6).
There are several reasons:
- It's a fast lens f/1.7 useful for subject isolation (bokeh) and for indoors/low light situations.
- It's not a macro lens but manages to focus down to 0.2m.
- It's pancake in thickness and weighs just 100g. Much slimmer than the kit zoom. Perfect size for walkaround use.
The lens has received excellent reviews.
Styling-wise, it's very plain and looks a bit oversized in diameter compared to the E-P1 body. It's definitely not as attractive as the classic f/1.4 Voigtlander 35mm M-mount I also have:

It's about the same thickness as the E-P1 body.
Enough about the lens, some initial test photos (all taken at maximum aperture f/1.7) showing the subject isolation/bokeh characteristics of the lens. I was curious about the depth of field given the impact of the quarter-of-35mm size 4/3rds sensor.
From the lobby of the Cerulean Tower Tokyu Hotel in Shibuya, Tokyo:
Of technical interest only...
Depth of focus chart

Click to zoom in.