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I have always powered down camera body and flash gun prior to mounting or separating. Likewise I have always powered down camera body prior to mounting or separating a lens. It is always a good idea prior to handling memory cards and batteries.
What do all of you do? Is it entirely necessary?
Always power down for changing lenses as I want to make sure no charge is going through the sensor and thus reduce the risk of dust bunnies being attracted. On the flash gun side I never power down the camera, as when shooting an event if I have to swap out the flash gun for any reason I don't have time to turn the camera on and off as I could miss the shot.
No never power down, but I think older flash guns had higher trigger levels.
I like the idea of turning off the camera before changing lenses - sounds as if it makes sense
perhaps i should try this.
Removing memory card on my canon turn off camera while flap is open anyway.
I think my camera does have an off switch somewhere .... not sure what it's for though ...
I tend to switch off the M43 more often, because the switch is more obvious and because it's easier to shoot or start video accidentally, and it tends to be power hungry anyway. If I don't make sure it's off, it could be sitting in a bag filming the lens cap in HD video all the way to destination.
Quote: I've never switched off when changing lens. I cannot see any reason why this is an issue.
I think it depends on the camera... if one has a self cleaning sensor camera I would expect to turn it on before connecting the new lens...
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