Originally Posted by seedubxj
Going to make a frame w/ 1x3s. Likey going to use Seymore Center Stage material, 2" black velvet border. I think I will go with 117.5". Thanks!
Just an FYI, I goofed when I made mine. I made the frame (for my SMX material) exactly 2.35:1, and then planned to add a border. But what I forgot to account for was that 4" (in my case) of the top and bottom is a lot more, proportion wise, than 4" off the sides. With a little finagling and uneven placement of my border I ended up with a 2.39:1 screen area, which worked out perfect for me.
But to put it really short, plan your screen area, and then remember to add 2" (or whatever your border is) to each side, rather than figuring your frame and assuming the AR will still be right when you subtract off the border.
Just an example, with your 118x50.25" screen, with a 2" border you'd want a 122x54.25" frame built (which is 2.25:1). If you goof like I did, and don't have the room to offset the border top/bottom, you'll end up with a 114x46.25" screen area (which is 2.46:1).