Well I am trying to go in scent free and I am still unsure if it works or not. The 1st camera had 160 pic and one mature deer picture. I think he might have been moving threw with only one day of pictures. The other camera had 45 and one mature deer. I am not sure about this set up because I think the camera might not have been set up right (aiming to high). I re adjusted it and now should be in business. I am pretty sure both are 3.5 however still not sure. What you guys think?