I was looking at both of these cameras in the store and for the life of me could not figure out if there was a way to pre-set focus to let's say 2.5m or 5m for zone focusing (using the 17 or 20mm lens). I really need this feature for street photography. Basically I am looking ....
Harry Lime, I had the same question, and after playing around with the Olympus E-P1 I found a very workable solution (other than using manual focus lenses
🙂 ). This should work on the Panasonic as well, and in fact works on all my DSLRs as well.
In the menu, you can toggle a setting to reset the focus to infinity when the lens retracts, you set this off. Another setting will allow you to set the AF function to the AFL/AEL button, or the FN function button. Lastly, there is another setting that will disallow manual focus from the manual focus ring.
With these settings done, you can use the AFL/AEL button to have the camera focus automatically, and once released the lens will stay at that setting regardless if you press the shutter button, manipulate the front manual focus ring, or turn off/on the camera. Basically, the lens sits at that focus point until you press the AFL/AEL button again. It decouples the shutter release from the AF function, and allows you to use the AF only when desired by pressing the AFL/AEL button. Quite handy for this purpose actually.
In practice, I will find an appropriate distance that I want to pre-focus on, say across the street, 10', or whatever, then press the AFL/AEL button and allow it to focus. I'll shoot typical street fashion without worrying about the AF refocusing when you press the shutter button, or even if you cycle power to the camera. If the conditions change and I want a new focus point, I just aim the camera at something at the desired distance, press the AFL/AEL button, and continue on using that new focus point. Its simple, fast, reliable, and even better than a manual focus lens since you can't change the focus by accidentally bumping the lens. You need to press the AFL/AEL button specifically.
Oh, and for what its worth, I ended up going with the E-P1 (like the looks better, don't need the EVF), the panasonic 20mm 1.7, kit 14mm-42mm, and put on order a 40mm 1.4 Nokton, already have a 75mm 2.5 Heliar, and will be ordering a 9mm-18mm for the wides.