<p>What you see is normal for the D80 camera. No Auto ISO with flash.</p>
<p>Nikon iTTL DLSR have implemented three plans for Auto ISO with TTL flash.</p>
<p>Auto ISO never advances in any case with a manual flash (not if the flash can be detected as present). And Auto ISO simply cannot work with any manual flash, because the manual flash cannot respond to changing ISO.</p>
<p>1. Older cameras, D70 to D300 era, including D80... Auto ISO did NOT increase from Minimum if you were using TTL flash, because, well, because you were using flash instead. However, exception, if the TTL flash were detected as not powerful enough, then Auto ISO would boost ISO to help it. No Auto ISO is true of Commander too, but it would not boost ISO to help weaker Commander flash.</p>
<p>2. Later cameras, from D300S to ALMOST today, things changed. Now Auto ISO is always set for the ambient, regardless if flash is to be used or not. So indoors where flash is needed, the flash will be working into high ISO, This will see the orange incandescent and green fluorescent, causing white balance problems with the more blue flash. You can filter the flash, or you can turn Auto ISO off with flash.</p>
<p>3. The most recent few models (D800, D600, D7100 - don't know about other recents) stopped that foolishness again, but (if external flash), it will advance Auto ISO up to two stops if TTL flash is present (typically to ISO 400, which is good for bounce). However, exception - the internal flash will still increase for the ambient, as in case 2.</p>
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