Graduated filters are expensive and we often forget to bring them with us. What to do if we are out already and need to use a graduated filter for a sunset scene?The process is very simple: you only need to have something opaque (like a credit card, or even your hand!!) and place it where you want t...
By: RandomHacker
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from Instructables: exploring - technology - robots http://ift.tt/1LAqHUS
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