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- Joined: Sat Jul 01, 2017 3:12 am
One can use an increase in shutter speed or a neutral density filter to cut the amount of light hitting the film stock or sensor, either to hit a desired ISO or aperture.
On film cameras, a neutral density filter is sometimes the only practical option. The fastest shutter speed on my Leica M3 and M6 is 1/1000 of a second. On my Mamiya 7ii, it’s 1/500 of a second. My large format lenses also have 1/500th, but that is optimistic.
On a digital camera with an electronic shutter, the advantage of using shutter speed to cut light is that you don’t have to mess around with a neutral density filter. If they can, some people prefer to avoid using a filter, which adds additional glass in front of the lens.
One special reason to use a neutral density filter is precisely to reduce shutter speed in order to get motion blur. For example, a landscape photographer who wants to photograph a waterfall might use a 10-stop neutral density filter in order to use a very slow shutter speed.
For me, the more common problem is too little light, not too much. I have a fair amount of experience pushing black and white film stock