how do u normally use both of them?
uv below, CPL on top?
CPL below, uv on top?
Best is not to stack
no need UV at all, sometimes PL needed
Hi TS, there is absolutely no reason to dump your UV filter and use CPL full time. CPL filter is more of an effect filter or use to increase exposure time. Unless you only shoot full time outdoors in the bright sunlight, you will lose a lot of light during other uses causing longer shutter speed. Imagine you are using a F2.8 'fast' lense, with a CPL on, your lense will not longer be as fast anymore defeating all your investment to get a good fast lense.
CPL is only to be use when required.
may i know what the real purpose of cpl filters and how much does it costs?can it be used on canon 450D?sorry i'm new to photography but i'm keen to learn more from you guys (:
As you can see, there is no mentioning at all about camera brands. Simply because it's put on the lens. At the front element lenses are just round and have a thread of certain diameter. So all you need to know is the diameter of the lens - just look at the lens from front and you will see. Prices you can find in the Marketplace, have a look at the price guides there.
For more information please also use the search function here. In addition, there are great Newbie Guides in the Newbie Corner. Look at the sticky threads on top of the listing.