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Question: Will it fit the Hero?
Document: works great but never got to use it, see comments in: GoPro Dive Housing for HERO Cameras  It does NOT fit the Hero 3 Black
It fit the camera perfectly, easy to install, they give you everything you need and it just takes 1-2 minutes to put on or take off and the same for changing filters.
You really need to have a red filter to get great pictures and video under water with the GoPro. I like that I can flip this up when I don't want a red tint, such as above water in the boat. The bad is that the frame that attaches the filter to the camera case covers most of the digital readout on the camera so when you want to change between video mode and picture mode you can't see the icons in order to tell what mode you are in.
Went on a fishing trip to Bimini this past June. Got amazing underwater footage with the GoPro. After reviewing the footage, I wish I had used the Backscatter more! Being my first time using any product like this, I was worried it would make the picture too red unless I was really far under the water. I found that it made an appreciable difference in the picture within easy snorkeling depths, maybe around 8-15 ft deep.
We used the Flip3.1 combo package on our recent trip to Roatan. Most of our diving was in the 20-60 ft range. The color correction worked very well for out videos and having the two choices of filters easily available depending on depth really makes it easy. If you dive with a GoPro you need one of these!
This kit was outstanding on our dive trip to Belize. We were able to adjust filters throughout the dive as we were at different depths. I reviewed some video from other divers with GoPros that didn't have filters and ours was much clearer with better quality color.The only negative is that they do scratch easily and did not come with any covers to protect it once installed. I made a couple of small sleeves out of microfiber cloth to protect them when the camera is in a bag or on the boat.
These made a big difference on our dives in Belize. Some things to watch out for are being sure the filter has snapped into place over the lens - had a few times the edge of the lens was in the frame -  and watch out for moisture on the GoPro lens reentering the water after a surface interval - this left some blur spots in the middle of the pictures at first. Other than that the colors were beautiful. We used the 20-50 ft and over 50 ft filters.Worth mentioning.
The piece is quality. I really like how it stayed secure when flipped up or down. It did not flop around at all.For the money and the results, this was a great purchase!
Screws are too small gauge. The screw strips when you try to put this on the GoPro frame making it useless.
I have also used the red filter that is a thin, flexible piece of plastic. It worked well and I could see the readout on the camera, but could not quickly remove it because it installs under the front glass. There aren't a lot of red filter options for the GoPro Hero2; this one is OK, better than nothing. The Red Cube by Polar Pro is another option that I have not tried yet.
Answer: yes