Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.
Already have an account? Login
"RE: Where is the focus?"
You also need a very flat clearly printed and high contrast target. And this would be start of process for testing the AF system.You shutter speed formula is for the FX or 35mm full frame camera. For a DX sensor, you need to adjust the focal length for the crop factor.
GeorgeMy Nikonian Galleries