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<blockquote data-quote="WayneF" data-source="post: 556671" data-attributes="member: 12496">Auto ISO is a mixed bag for flash.&nbsp; Bringing ambient up with high ISO means incandescent lighting is seen, and is orange, actually&nbsp; needing incandescent White Balance, which is incompatible with flash.&nbsp; Keeping ISO low shuts it and the orange out, and uses flash instead.With a regular hot shoe flash (with its own menus), the D750 should never allow Auto ISO to advance more than 2 stops above Minimum ISO (like to ISO 400 from 100) if a flash is detected present.&nbsp; Because 1) you're using flash, and don't need ISO to bring the ambient up full bright, and 2) ISO 400 is about right for bounce flash.But the internal flash is tiny and different, and for it, the camera will bring ISO up to maximum for the low ambient, regardless if internal flash is being used or not.&nbsp;&nbsp; I think the D500 has no LCD and uses the cameras internal flash menu like the SB-300 and SB-400 do ?So it sounds like it is letting ISO go to maximum, regardless of flash.&nbsp; Certainly the SB-300 and SB-400 do, and your description says the same.You can always turn Auto ISO Off with flash (not in Auto mode, but in A, S, P, or M modes).On Nikon, Exposure Compensation adds to Flash Compensation.&nbsp; EC -1 and FC 0 reduces both ambient and flash exposures by -1 EV.The D750 has menu E4 to change that, to keep that default, or to make them separate (as per Canon).&nbsp; What the E4 menu calls Background means &quot;ambient&quot;.</blockquote>

[QUOTE="WayneF, post: 556671, member: 12496"] Auto ISO is a mixed bag for flash. Bringing ambient up with high ISO means incandescent lighting is seen, and is orange, actually needing incandescent White Balance, which is incompatible with flash. Keeping ISO low shuts it and the orange out, and uses flash instead. With a regular hot shoe flash (with its own menus), the D750 should never allow Auto ISO to advance more than 2 stops above Minimum ISO (like to ISO 400 from 100) if a flash is detected present. Because 1) you're using flash, and don't need ISO to bring the ambient up full bright, and 2) ISO 400 is about right for bounce flash. But the internal flash is tiny and different, and for it, the camera will bring ISO up to maximum for the low ambient, regardless if internal flash is being used or not. I think the D500 has no LCD and uses the cameras internal flash menu like the SB-300 and SB-400 do ? So it sounds like it is letting ISO go to maximum, regardless of flash. Certainly the SB-300 and SB-400 do, and your description says the same. You can always turn Auto ISO Off with flash (not in Auto mode, but in A, S, P, or M modes). On Nikon, Exposure Compensation adds to Flash Compensation. EC -1 and FC 0 reduces both ambient and flash exposures by -1 EV. The D750 has menu E4 to change that, to keep that default, or to make them separate (as per Canon). What the E4 menu calls Background means "ambient". [/QUOTE]

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