I've decided that as I have a lovely new Nikon D7000 I need to learn how to use it to its full potential to justify the £'s spent on it. It's not easy to learn and retain information at my age but I'll have a damn good try. Today I have learnt that ISO is the level of your camera's sensitivity to available light. The lower the ISO number the less sensitive it is to light while the higher the ISO is the more sensitive the camera is to light. Also the higher the ISO number is the more noise or grain you get on your photo so it's almost always best to use as low an ISO setting that you can.
ISO Aperture and Shutter Speed are known as the Exposure Triangle. This is a good link for an explanation of how they work together.
http://photographylife.com/iso-shutter-speed-and-aperture-for-beginners
ISO = noise The higher the ISO the more noise on or grainy the photo
Aperture = depth of field the lower number F stop (larger opening) eg F5.6 the smaller depth of field (blurry background) The higher the number F stop (smaller opening) eg F20 the longer depth of field (clearer background )
Shutter speed = Blur The faster the shutter speed the more clear a photo is. The slower the shutter speed the more blur occurs. Running water ie a river can look milky if a slow shutter speed is used.
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