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Nikon DSLR Cameras
D7100
D7100 and TTL external flash
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<blockquote data-quote="WayneF" data-source="post: 228570" data-attributes="member: 12496"><p>Agreed those are all the same scene, which should meter the same in the same metering situation. (Sorry, I really did expect otherwise )</p><p></p><p>Are you sure that the flash is actually firing in all cases? I cannot tell much about the shadows, esp in the dark one. Misfiring is really the only thing I can imagine however. Is the flash in the hot shoe, or triggered some other way?</p><p></p><p>Flashes possibly could become inconsistent, but since you say all flashes are affected the same, it would not be some one bad flash unit. It instead sounds like a defect in the camera metering or triggering. I cannot guess what it could be however, I've never been aware of any such problem description. If it might be a radio trigger, that seems the first thing to suspect.</p><p></p><p>I cannot duplicate anything like that with SB-800 on D300 or D800. But FWIW, metering situations definitely can change things. All of your stated cases ought NOT to be the same. Center, Matrix, or Spot only affects ambient, does not affect the flash, which has its own metering system in the camera (but TTL BL is affected by ambient). Matrix can be affected by bright ambient not in the center (which then can affect TTL BL). Spot metering changes the TTL BL mode to be TTL mode, which can often make a big difference to the flash exposure (often better indoors). FV Lock can change things too.</p></blockquote><p></p>
[QUOTE="WayneF, post: 228570, member: 12496"] Agreed those are all the same scene, which should meter the same in the same metering situation. (Sorry, I really did expect otherwise ) Are you sure that the flash is actually firing in all cases? I cannot tell much about the shadows, esp in the dark one. Misfiring is really the only thing I can imagine however. Is the flash in the hot shoe, or triggered some other way? Flashes possibly could become inconsistent, but since you say all flashes are affected the same, it would not be some one bad flash unit. It instead sounds like a defect in the camera metering or triggering. I cannot guess what it could be however, I've never been aware of any such problem description. If it might be a radio trigger, that seems the first thing to suspect. I cannot duplicate anything like that with SB-800 on D300 or D800. But FWIW, metering situations definitely can change things. All of your stated cases ought NOT to be the same. Center, Matrix, or Spot only affects ambient, does not affect the flash, which has its own metering system in the camera (but TTL BL is affected by ambient). Matrix can be affected by bright ambient not in the center (which then can affect TTL BL). Spot metering changes the TTL BL mode to be TTL mode, which can often make a big difference to the flash exposure (often better indoors). FV Lock can change things too. [/QUOTE]
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Nikon DSLR Cameras
D7100
D7100 and TTL external flash
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