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.
True?
I don't know what you're trying to say here, but I know this is a true statement, so,
Happy studying!
~Mistermistyeyed.
If you give up something to get something else, it is called the trade-off,
The balloon will have seem seemed to pop from the heat :)
