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I don't know how to lock the shutter speed on a Nikon D90. Any time I take a picture, the shutter speed changes automatically even if it's on Manual mode. Any way to lock it?

marked as duplicate by mattdm, TFuto, inkista, James Snell, Michael C Jan 23 '16 at 0:51

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If a manual shutter speed is changing, then you have Bracketing turned on. Turn bracketing off. Change number of bracketed shots to be zero.

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