wow,i am so glad that CS is very serious in sharing. IMHO, this is the 1st forum that I joined with so many good feedback and w/o biased opinion.
by the way,could anyone tell me, how to choose lens type? for eg
10-24mm for what type of photo
40mm da ltd for?
You are only limited by your imagination. While a UWA (10-24mm) is usually used for landscape and tight spaces, I use mine for portraits and close-up candids. For shallow DOF (blur background), all lenses are capable as long as you know the cam-subject-background distance relation. A fast lens (f2.8 and less) does help achieve shallower DOF, at the expense of smaller area of focus.
OK, this is for educational purposes so that you can make better choices. Not that I'm recommending you to go nuts on getting lenses.
Like all the seniors have said, go get an dslr - use it, take photos, see the limitations of your lenses before buying more lenses. I'm pretty serious about this, you're one person i don't like poisoning. :bsmilie:
Taken from http://mcfaddenphoto.com
Interesting write-up there. And more interestingly, he uses mostly manual focus lenses.