I use 67mm filters with an adapter. They work well, even with a short lens hood attached. I shoot most of my shots hand held, although using a tripod allows for more critical focusing. As far as the screen, my 501 came with a split image that I like. Since I wear glasses and hating trying to focus with them on, I take them off and use the split image to focus. This would not be possible with a matte screen. I also have the factory narrow strap. It is scary to carry such a big camera around with it, so I just have it incase I may drop the camera, it allows me to grab on to it better.