I have a 3100 and noticed that it was a little noisy when taking pictures a Mass a few weeks ago. I just put it in child mode and it lessened the noise considerably. Of course that turns off the flash as well as lessening the other sounds so if you need the flash hat might work. Even with the noise, I hunk that I was the only one that noticed it, it definitely wasn't obstructive and I was even shooting during the Eucharistic Prayer and the consecration. Probably not liturgically correct but oh we'll, I got some great shots!
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