the outer barrel contains the focus mechanism, and the inner barrel contains the aperture diaphragm and the IS mechanism

IMG_A18156

the outer barrel contains the focus mechanism, and the inner barrel contains the aperture diaphragm and the IS mechanism

back shed at home, Western Australia, 2010-11-06

Canon EOS 50D, 24-70mm f/2.8L @38mm, 1/30 sec, f/5, ISO640

image uploaded on 2010-11-07

This photo is featured in gallery: Aperture cable replacement in a Canon 17-85mm IS lens

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