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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.

2 votes

Can I lock the mirror up indefinitely without damaging my DSLR?

Basically, if the camera lets you do it without some kind of mechanical hack then you will not be causing disproportionate damage to the camera. IMO, there is a very high likelihood that the camera wi …
Steven Kersting's user avatar