Can you tell me the difference in IQ between the Zuiko 14-42mm Kit Lens and the 14-54mm. I know the 14-54mm is higher grade, but I am just wondering how much better it is than the kit lens. I have just ordered the E-420 body kit only with a view to getting a high-quality lens for all-purpose use.
The 14-54 is better, in most ways. No doubt about it. But, it is quite a bit heavier than the 14-42 (which is "impossibly" small and light), and it is first and foremost in "low-ish" light you will see the biggest difference, when you can use that extra speed (2.8-3.5 vs 3.5-5.6).
I would (and did) stick to the 14-42 kit lens for a while, get to know the camera, shoot a bit and not upgrade the lens until you feel the limitations of the kit lens., which is a really capable little lens.
Also, what is the IQ comparison between the Zuiko 14-54mm and new 12-60mm (fastest AF lens in the world?)? I heard the 12-60mm is more heavier and bigger, so I am concerned with using that lens with a E-420 which is very light (since the E-420 does not have IS). Any recommendations would be much appreciated.
The 12-60 is a bit heavier than the 14-54, but not that much (575g vs 435g, vs 190g(!) for the 14-42), and I don't see a problem mounting it on a 400-series.
Now, as I said above I couldn't justify getting the new 12-60 over the 14-54 because of price (the 12-60 was more than twice the price of the 14-54). Part of my reasoning was that although the 12-60 has been touted as the "fastest AF in the world" that is only valid when used with the E-3. You'll see a AF speedup compared to the kit lens, but the full potential of the new pro lenses will only be unleashed with the E-3 (according to the rep from Oly Norway).
If you quite often find yourself in situations where you could need those extra couple of mm with wide angle that the 12-60 offers (which I've yet to experience, but, hey, I've not had the 14-54
that long), you may also consider if you shouldn't go all the way and get the
7-14mm 4 (in combo with the 14-54 or even the 14-42). The 7-14, although a bit pricey, is a fantastic lens. I've just tried it in store, but that was amazing. I took a couple of images on 7mm and the floorboards on the pics were still straight(!), I almost didn't believe my own eyes.
My point is, to repeat that, use the kit lens at first, and upgrade it when you feel it's limitations, and at that point you'll probably know if you need the 7-14, 12-60/14-54 and/or maybe even a pro telephoto zoom?
Enjoy the 420, it's supposedly a very handy little camera (and with lots of goodies I miss on my E-400 </bitter>).