This is a custom built underwater surf housing by Dale Kobetch for the Canon EOS 3 with a 550ex flash. This housing created many magazine spreads and posters for me. Dual pistol grip controls for shutter release. Also controls for rear button focus and aperture. The dome is designed to be used with the Canon 15mm f2.8, but works great with the Canon 24mm, 28mm, 50mm.... can't remember if it fits the 20mm f2.8. Dome is in pretty good condition, there are some mars that could easily be buffed out using acrylic polish. Don't use this anymore... $150 - will throw in a very nice EOS 3 body with PowerBooster E1 for $350 (can't use booster in the housing) This would be hard to find new.... There is a repair for a small crack on the housing where the flash and body come together. I made a quick repair to it and it held water the last time I shot with it... which was years ago. Dale makes the lightest housings out there for use with sports. This housing is NOT for scuba diving. It is only rated to about 15' depth.