Holy Cow! ; Wish I could have snuck away for this show... brought to you by an (HTC) "Incredible" Guy.
VERY Nice! never thought of using an ND for fireworks, I guess that would get you a nice long exposure.
It is all the rage on flickr. ; Firework exposures going over 1 minute. ; It also helps to control highlights. ; I am looking at getting an ND set of Tiffen filters (2, 3 and 4 stops).
Can those filters be mounted together also for additional stops? ; I think I just saw something like that. Not sure my camera can take longer than 30 sec exposures..... So the concept is take a long exposure with the filters to reduce blowouts while several fireworks are released?
Most filters can be stacked for longer levels. ; You need to use bulb mode to get longer than 30 seconds. ; Remember that the longer the camera is open the greater the chance for blur.
ND = Neutral Density. ; Its a colorless gray filter that reduces the intensity of the light entering the lens without changing the color in any way. ; This allows for longer exposures and is typically used for things like blurring water on a bright sunny day. They come in different densities and as Tim mentioned they can be stacked to create even darker filters. ; Another option is a "variable neutral density filter" which is a circular polarizer and a linear polarizer stacked on top of each other. ; The variable ND filters tend to be very expensive because they require matched pairs of filters to work properly.
