I've been playing around with manual focusing and i couldnt answer a simple question.
My D90 has a auto focus and manual focus switch, so i know that if i want to manually focus i switch to little selector to "M".
But......my 18-200 lens has a auto focus and manual focus switch also!

So, what is the most correct way to select manual focus. Do i need to switch both to "M", or do i just do one over the other...in that case do i switch the camera or lens over to "M".....or does it simply not matter just so long as one is on manual.