Aperture, Shutter Speed, ISO, & Light Explained-Understanding Exposure & Camera Settings 05-20-2013 SUBSCRIBE and like http://fb.com/NorthrupPhotography Buy the #1 book with 14+ HOURS of video on Amazon: http://help.tc/s Worldwide use 10% off coupon ‘YouTube’: http://sdp.io/sdpbook Lightroom… Share Tweet +1Shares 0