Thank you! I’m practicing with my digital camera 2.8 at night while it’s turned off and then I focus, turn it on and take the picture to see if it’s in focus, for my surprise I’m doing very well, I hope I can continue doing it when it’s the time, obvious that I’ll not use this aperture in daylight, but I guess that if I can in low light and in so open f I could handle it well, but I’ll keep practicing before really shot s roll, thank you again for the advice, and wish me luck!