If you are following my photo blog, you will know that I just ADORE my little LUMIX GM1 and it's tiny Lumix G 12-32mm f/3.5-5.6 zoom lens!
For the last two years, I have been using this set up for everything from food to line dancing.
I love this little lens for its compactness and good sharpness, so what if it is not very "bright" at F3.5 but I can live with that!
To maintain the compactness of this little lens, you need to twist the lens barrel to extend the lens and make the GM1 active. The camera WILL NOT WORK if the lens is not extended.
Now I suppose you realised that, if you switch on your camera thousands of time to take pictures, you will have also twist and extend the little lens thousands of time!