I am short on time, so forgive the quick post! :)
1) whatever type of pictures you intend to have, rules of composition do not have to apply if you don't want! :) You don't have to use any of them, they are just intended to give you a more powerfull overall image....as long as you use one that gives you the feeling that you want. make sense? there are times when you are going to say, I like this image with the subject smack in the center, and usually when people have a reason for it, it works! The main purpose is to keep people from constantly putting the subject smack in the middle with lots of irrelevant space or clutter around the subject.
2) for priority mode, you can adjust both the aperture and shutter if you want and it over-rides the camera's settings, the camera in turn compensates. Priority is not auto. IMO its a way to bounce back and forth between aperture and shutter priority without actually doing so. LOL also, my wed-photog friend went to a Dennis Reggie --thing---I'm drawing a blank. She went to his hometown and learned hands on from him--a GIANT among wedding photogs--he has done celebrity weddings for decades and he makes 50,000 per wedding or more. He's a southern gentleman too. Not that that matters, it just makes him more likable. :) Anyhow, he told the people that "P is for professional". LOL So don't be afraid to use it. Although I understand that--I am afraid to leave my comfort zone- manual. Totally afraid. Partly of giving up control, and partly of becoming too comfortable and not feeling comfortable going back to manual!
3) I believe that the 3d tracking uses colors moving to track your subject, so if you encounter any problems with that working to your benefit, it could be because of more than one subject with the same color moving in different directions--kwim? the camera may not know which moving boy with a red shirt is the one you want. If it is working the way you hope, that's great! there's a lot to learn about the d300's autofocus modes!
~~Tammi~~
d300, MB-D10, sb800, sb400, 18-200VR, 18-50 f/2.8, 28-75 f/2.8, 90 f/2.8 macro, 50 f/1.4, Pocket wizards, sekonic L-358, and an aresnal of reflectors and other light modifiers....and maybe more. ;)
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