I just got a Nikon D90. Haven't used it yet, just been learning my way around it, and I discover to my horror that there is no way to lock up the mirror. I knew it had no mirror-up drive option, but I thought with live view it wouldn't matter - the mirror's up, right? Well, sort of. In live view, the mirror goes up, you focus (manually or auto), and when the shutter's pressed, the mirror goes BACK DOWN, then up again, the shutter fires, and the mirror goes back up. What's up with that?? This strikes me as a fatal flaw, but am I overestimating the importance of MLU? I've used it a great deal with my previous cameras (Canons). I shoot a lot on tripod, often waterfalls, landscapes in low light, etc. that involve medium to very slow shutter speeds, so it seems essential. Any ways to work around this?
Thanks for any advice....