well, a lot of my friends who are semi-pro photographers change lens on the fly. I asked them "wouldnt that damage anything?". they sed that if they turned it on and off on and off on and off everytime they change lenses, it wud be worse of a damage.
well, a lot of my friends who are semi-pro photographers change lens on the fly. I asked them "wouldnt that damage anything?". they sed that if they turned it on and off on and off on and off everytime they change lenses, it wud be worse of a damage.
There is not only a fair amount of logic applied here, but also a fair amount of truth. Really, in DSLRs you usually do not have the start up times that you see in P&S cameras so why not turn it off to be safe?Nikon recommends you turn your camera power off before changing lenses. Thom Hogan repeats this warning in his reviews of the 70-200 and 70-300 - he says it has something to do with problems caused if you change lenses while the VR is still active. I don't know if that's accurate or not; but since most modern lenses include computer chips and electronic circuits... I think you're just asking for trouble if you remove a lens while the circuitry is still live, even if it's low voltage.
I can't imagine it causing problems for the sensor; mainly just the lens.
Define "semi-pro".
I don't recall but I believe some camera manuals may even speak to turning off the camera before removing a lens or memory card for a variety of reasons.
I can't speak for camera manuals, but all VR lens literature (that I've seen) warns to turn VR and the camera off before removing the lens to avoid chattering.
I had never heard that of the VR lenses. I'll be careful to do it now.
Nikon doesn't seem to make that big a deal of it. They mention it more often in the troubleshooting "My lens is chattering! What do I do?" question than anywhere else.
It's not that big of a deal. Change the lens if you have to. If you feel better about shutting it off go ahead, if not then leave it on. You are more at risk for dropping your lens while shooting and changing them than blowing a circuit in your lens.