Modern DSLR cameras use the Phase Detect autofocus method to determine the correct point at which to focus the lens. This method is fast and generally accurate, and operated by light travelling through the lens. When you half-press the shutter button on your DSLR while looking through the optical viewfinder, it’s Phase Detect autofocus that’s used.
O Seventh chords are capable of root position plus three inversions.
o Chord inversion requires moving the bottom note to the top of the chord.
A. Shapes can be either geometric or organic
