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Why doesn't the f-stop on my D7100 change when I hold +/- and change the dial in manual mode? - Photography Stack Exchange
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JINTU 420-800mm Manual Telephoto Zoom Lens for Nikon D7100 D80 D90 D600 D5000 D5100 D3200 D7000 D7200 DSLR Digital Camera with Aluminum Alloy Black – jintuphoto
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