[GeoffKwok]

Does anyone know where I could find more information on learning Filter lens? I had read some magazines, but the information is very novice. I wanna more.

Please Help!

[dianelo]

http://www.camerafilters.com/

[香港至NET超人]

You never learn anything unless you try it.
Effect of filter is to block the light in either color channel or reflection index. It is pretty easy to simulate it on Photoshop.

[GeoffKwok]

Dianelo & 香港至NET超人

Thanks a lot. You're right I have to try it myself. Before I do that, I would like to learn the function of the filter I'm gonna buy.