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Mirror Lockup is an option in DSLRs that allows the mirror to be retracted prior to a photo, giving much quieter operation and reduced vibration.

8 votes

Why do I have to press the shutter button twice on my Canon 6d Mark II?

When i press it down its like something inside the camera closes and then when you press again it captures the image and the view finder opens back up This sounds like Mirror Lock Up functionalit …
OnBreak.'s user avatar
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