[monmonlee]

兩者有什麼分別?
分別用來影什麼?
現在是否還有人用插入式濾鏡?

[micros]

http://www.thkphoto.com/products/hoya/oef-08.html
http://www.thkphoto.com/products/hoya/oef-05.html

多數都係風景﹐而又有大光差﹐好似日落時又要埋個海咁。

用 GND 就片型方便同具彈性。

[tam_dominic]

全灰 ==> 全面減光
eg. Block light goes into the sensor forces the use of lower speed.
Such as taking photo of flowing water, moving cars etc.

漸變灰濾鏡 ==> 局部漸變減光
eg. reduce the strong light from the upper part of the frame such as bright sky comparing the sea / ground.

Happy shooting !