A:AnswerYes they are but you will need a adapter to hook up EF lenses to the R50. I bought my adapter off Amazon for 50 dollars and have a Canon EF 1.4 50 mm lens on it and it works perfect.
A:AnswerDoes a fantastic job in taking RAW images and yes Photoshop will work perfectly with it and yes they transferred as RAW images off the card to the software on the computer. I personally use ON1-2025 version to do RAW imaging and like it alot!
A:AnswerMine came with a supplied AC adapter, but you might want to get a extra battery or so. I have 2 extra batteries because it does go thru them quicker than typical DSLR cameras.