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Message: <blockquote data-quote="Bob Blaylock" data-source="post: 574532" data-attributes="member: 16749">If there's no aperture ring, then yes, this is a “G” lens.  The aperture ring, on lenses that still have it, is an artifact from older days, when that was how you changed the aperture setting.  In more modern applications, it is that lever that I indicated, that the camera uses to set the aperture.  Originally, that lever was just intended to support the feature of holding the aperture all the way open for viewing, then letting it close down to take the picture.  In any event, if moving that lever upward does not cause the aperture to open up, then your lens is indeed defective.</blockquote>