[Villareal]

都係為了減少光度，可以在白天用較慢快門，對嗎？

[Villareal]

仲有，有一些風景相，個天空有好漂亮的漸變色(由深至淺)，點先拍到這個效果？

[Villareal]

即係好似呢張咁，點先影到漸變的色彩？thanks!

http://www.dcfever.com/photosharing/enlargephoto.php?photoID=266287

[onon359]

完全兩樣野!
黑咭使用:http://www.dcview.com.tw/gallery/showmsg.asp?msgid=229171

[Xavier Chan]

黑卡要好有經驗
並唔係你想像中咁簡單

[四把火]

咁有無網頁係專教點用黑咭ga?

[tam_dominic]

「黑卡」同埋「漸進減光鏡(Gradual Neutral Density filter)」是同一個功用\n
「黑卡」is not transparent but can be different shape and need at least several seconds exposure time to allow 黑卡 movement manually.

「漸進減光鏡(Gradual Neutral Density filter)」is transparent gradually and can shot at fraction of a second or several ten seconds.

They share the same light blocking function.

[tam_dominic]

「減光鏡 ND filter」係為了減少光度of the whole photo，可以在白天用較慢快門，對 !

「黑卡」為了減少光度of PART of the photo eg the sky is too bright comparing the lower part of the scene. In order to make the whole photo evenly exposed use 黑卡 or 「漸進減光鏡(Gradual Neutral Density filter)」to reduce strong light from the sky.

Happy shooting !