For all camera brands, the same basic settings can be used to ensure a good starting point and to have solid, well exposed intra-oral photos.
Set your cameras to the following settings:
• Aperture priority (AV or A)
• Aperture set to ƒ 22 or higher for all shots inside the mouth (intra-oral)
ƒ 4.0 to 5.6 for all full face / head and shoulders shots
• ISO: 200 (200 is native to Nikon, while 100 is native to Canon - either will work fine)
• White Balance: Set your camera to the flash symbol or the Average White Balance (AWB) setting.
• Color Space: Adobe RGB
• Be sure your flash is set for TTL (Nikon) or ETTL (Canon).
• Do not worry about the shutter speed - if your camera is actually on Aperture priority - the camera will set the shutter for you.
• If you know what it is - leave your "Exposure Compensation" dial set to the middle of the scale. If you check your histogram, and you should, and its showing the hump to the middle left, then move the exposure compensation up a notch or two and check your histogram. You want your histogram with the hump to the middle right with it tailing off before it gets to the right side. Its always better to overexpose a digital image than underexpose. (unlike what we learned with film)
•*For now, do not change the output of your flash head - let it work at the basic -out-of-the-box- settings. Always use fresh batteries!
Go forth and burn pixels!