by Atomic » Fri Jul 10, 2009 8:04 am
Its a useful lens, but you cant expect any single lens to have everything. If you want a lens with a 10x optical range, you're going to sacrifice image quality, theres just no escaping it. That said, from most accounts, the lens is very good for what it is, and obviously is very flexible and very useful if you find yourself going from a "normal" field of vision to significant telephoto very often in rapid succession.
NOW, a big telephoto sounds pretty awesome at first, I know this... but honestly a wider angle is more useful than a bigger telephoto. 18mm is just not wide enough a lot of the time for this lens to replace your 14-42. The goal of the 18-180 is to replace the two kit lenses so you only need one lens, but since you will need a wider angle than 18mm what will happen is you will still end up carrying two lenses around. Furthermore, 180mm is a very big telephoto and honestly not all that necessary, especially considering that at 180mm you will be sacrificing optical quality.
It is in my opinion a much wiser [and cheaper] move to just get a 40-150mm. There were two generations of this lens and both will set you back about $120 [used]
The older generation is bigger but optically faster [F/3.5-4.5] than the much smaller second generation [F/4.0-5.6]
You may value the compact nature of the 2nd generation more than the larger aperture, however I personally went with the older one [I've had both at the same time at one point] because F4.5 at 150mm [300mm eq] is very awesome and more useful to me than the smaller form factor.