recently i purchased a Canon Xti and some people say need circular polarizer but my friend said dont need one ...

well, anybody has pic with it n without it ?

and whats exactly circular polarizer do ?

Thanks !!

 

it will take reflections off cars, windshields, water, etc. for automotive photography U NEED ONE.

 

smack your friend.
a circular polarizer is a must have in your camera bag.

you can't use a linear one because it'll screw up your autofocus crap.. but you need to buy one and play with it yourself.

it takes away glare just like a set of nice polarized sunglasses.

 

it protects your pretty lens from dirt and scratches too!

 

x4's the above comments