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Message: <blockquote data-quote="Pierro" data-source="post: 70133" data-attributes="member: 8517">If you add extension tubes to any lens, you will have to get closer, so it may not give you a reasonable working distance, depending on what that distance is that you require.They dont interfere with the IQ as they dont have any glass as you know, but they do cut down the lightThe very cheapest way to go macro is to use a reverse mount adapter and something a like a 28mm fastish prime,  say around f2.8, and reverse mount the lens, using the filter thread.  If the filter thread is say, 52mm, then buy a 52mm reverse mount adapter.For a proper macro lens, you'll get fairly decent working distance from anything around 100mm upwards. 200mm is about as long as you get in true macro lenses, but they  cost a lot of coin</blockquote>