Voking VK-C-ET2 13mm 21mm 31mm Auto Focus Macro Extension Tube Set for Canon SLR Cameras (Black)

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About Voking VK-C-ET2 13mm 21mm 31mm Auto Focus Macro

Product specification Auto-Focus This extension tube is made of 13mm tube (Tube 1) 21mm tube (Tube 2) 31mm tube (Tube 3) Metal bayonet Features: Lightweight design Material: Mainly Metal Perfect coupling with TTL.AE Metering Use Individually or Combined. Compatible with: All Canon SLR cameras, such as: EOS Rebel X,Rebel XT,Rebel XTi,Rebel XSi,EOS 450D,EOS 400D, EOS 350D, EOS 300D...... EOS 10D,EOS20D,EOS 30D,EOS40D,EOS5D...... EOS 1D,EOS 1Ds,EOS 1D mark II,EOS 1Ds mark II,EOS 1D mark III,EOS 1Ds mark III...... EOS 30/33/30V...... EOS 50/55, EOS kiss III, EOS kiss IIIL, EOS 100...... EOS 10, EOS 300V, EOS 300X, 300VQD......Description This is used by attaching between camera body and lens of the 35mm single-lens reflex camera,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.