| Joined: | Thu Apr 19th, 2012 |
| Location: | United Kingdom |
| Posts: | 4424 |
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I don't have a D5000 anymore but a D5300. Go to ISO Sensitivity settings and> to AUTO ISO SENSATIVITY CONTROL and set it to OFF, if the D5000 has that setting.
This may work or you may have clicked the rear shutter speed dial while taking your picture.
Is that correct Mike? Surely the whole point of auto ISO is for the ISO to change to ensure correct exposure at the fixed shutter and aperture parameters?
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Eric