13. http://mediapro.utcc.ac.th/read/200-trip/1771-photo.html.
What is portrait photography
[
http://photoartcmu.com/sites/default/files/portrait_3.pdf.
http://www.photowithjack.com/2012/05/
Depth of Field [
http://www.photowithjack.com/2011/08/ -depth-of-
field/.
http://www.photowithjack.com/2011/08/