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By Matthew Currie · Posted
Taking this a little further and likely further than it ought to go, I tried measuring this on a D7100 with a sound meter (inexpensive Radio Shack one) To begin with, it's not entirely consistent, and the volume of the sound depends much on the lens. So I tried taking the lens off, and measuring at the lens hole, and it's pretty close to a wash. I actually have two meters, one digital and one analog, and the digital one suggests that the sound is pretty much the same for all modes. But the analog one favors Quiet mode by quite a margin. It may be that the duration of the maximum sound level is so brief it does not register on the meter, but the analog meter tallies better with the subjective evaluation of the sound. With the meter set at the 90 DbA range, which presumably means that 90 DbA will register as zero on the meter, the S mode gives about 90 in a single noise. The Mirror Up mode gives a low reading for the first sound, and 90 or so for the second. The Live View gives multiple noises, close to 90 entering LV, and then the shutter makes nearly 90 on its first sound and about half that on its second. So even if you can conceal the turning on and off of LV mode, you end up with a louder shutter. Q mode gives you two noises, but both are about half that of a single shot. Putting the lens back on damps all the sounds, but they stay about the same relatively. with Q mode winning. Interestingly, when I metered a couple of my old F's, they came out pretty nearly the same as the D7100 in both analog and digital readings, despite the subjective sense that they make quite a clatter. The sound is different, but the level is about the same. If you can afford the lack of features, my old D3200 is considerably quieter, especially in Quiet mode. The mirror on this is very well damped. -
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