I am not sure...I just got a Deercam and have one roll of film back. The setting as 15 seconds, so I got several pics of each deer that crossed. Some of them seem puzzled/nervious. This could be the flash...don' t know.

What I DID notice is that they are very focused on where I walked!! I had rubber boots on when I set up the cam...I walked in front of it to test it...I got the pic back of me walking in front of it...and one hour later, a doe was caught on film smelling the very same spot that I was in. I got several more pics like that for 3 days after the setup.

Be interested to see if flash spooks them as much as scent...