MEIKE MK-C-AF1-A Metal Auto Focus Macro Extension Tube Set for Canon DSLR Camera 13MM 21MM 31MM 1D 6D 7D 50D 70D 550D 700D 5D Mark II 5D Mark III etc

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About MEIKE MK-C-AF1-A Metal Auto Focus Macro Extension

Feature This Macro Extension Tube Set for Canon DSLR Camera includes 3 extension tubes - 13mm, 21mm, 31mm adapters You may mount the tubes between lens and camera body to get your choice of macro ranges. it comes as a set of 3 tubes of different lengths which singly or in combination makes it useable in 7 different lengths,it couples perfectly with the camera's automatic diaphragm,with cameras of TTL,AE (Through-the lens,Automatic,Exposure)type it gives perfect coupling expect when combined with electronic flash AE unit. the imagic magnification ratio becomes smaller as the focal length of master lens becomes longer and the larger as the focal length becomes shorter. also,the distance to the subject becomes further away as the focal length of master lens becomes longer and closer when it becomes shorter.In close-up shooting, as the subject's depth of field becomes shallow,never forget to stop down the lens. take care that when image magnification ratio increases camera shake is also liable to increase.(the use of tripod and cable release is advisable.) Package 1*13mm+21mm+31mm 1*Manual