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Message: <blockquote data-quote="Eye-level" data-source="post: 78284" data-attributes="member: 6548"><p>So you are using M mode all of the time? I am not familiar at all with AF lenses.  I have one but I still haven't really used it but I have used other ones many times just haven't studied them close enough to see what the aperture is doing when I am changing things around.  I would assume that your camera is OK if your pictures are OK.  Try holding the shutter button halfway and see if that changes the aperture.  Someone else may have to help you with this question.  With that lens everytime you focus it should be within it's range 3.5-5.6 wide open...then when you trip the shutter it should stop down to whatever stop and speed you have manually set it to.  Like I said I doubt there is anything wrong with the camera or lens.</p></blockquote><p></p>