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Author Message   Waynemel Tinkerer Username: Waynemel Post Number: 426 Registered: 08-2009 Rating: N/A Votes: 0 Posted on Thursday, March 14, 2013 - 03:23 pm:    When the camera is set to "A", the meter needle should constantly change with different light levels. When the shutter release is pressed half-way, this locks the exposure. The movement you see with the half press is the needle being locked. With the camera not on "A", the meter should be inoperative. You may have something physically obstructing the needle. The aperture blades may need to be cleaned.