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Nikon DSLR Cameras
D750
how your auto iso and flash works ?
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<blockquote data-quote="WayneF" data-source="post: 557187" data-attributes="member: 12496"><p><em></em></p><p><em>Getting out of TTL BL, into TTL mode, would do it. I used to imagine that additional flash compensation worked with TTL BL, and indoors in insignificant ambient, it will vary the flash level, but when the ambient is fully exposed, TTL BL has its own mind about what fill compensation is to be used. That's what the TTL BL mode does.</em></p><p><em></em></p><p><em>Flashes like SB-800, SB-600, SB-900, SB-910 have a menu to force TTL or TTL BL mode. Makes it very easy. Why Nikon is giving that up is a mystery to me. It ought to be a menu in the camera.</em></p><p><em></em></p><p><em></em><em></em></p><p><em></em></p><p><em>It is not the flash. TTL BL is the Nikon flash metering system default, unless overridden into TTL mode. It is Yongnuo flash too, etc.</em></p><p><em></em></p><p><em>Balancing background with a Spot is not feasible (is nonsense), so Spot Metering shifts the flash mode to TTL (does not balance).</em></p><p><em>The flash metering Never does actual Spot metering, but the ambient does.</em></p><p><em></em></p><p><em></em></p><p></p><p>That can work indoors, with insignificantly exposed ambient (at least reduced significantly, when Spot metering problems of underexposed ambient is not a concern). It is still TTL BL (in Exif), but it acts like TTL flash with insignificant ambient. Flash compensation works. But moving outdoors into sunshine can bring diffrences of Spot metering of ambient.</p><p></p><p>Novices imagine Spot metering should produce the spot as correctly exposed. It does NOT... it only produces middle gray at the spot. Which can be correct if the spot should be middle gray, but if spot metering on a face, we sure better open exposure about 1 stop more. Faces are typically not middle gray. Spot metering is not point & shoot, we have to consider the spot, carefully. But it only affects ambient, and indoors with insignificant ambient (underexposed), it doesn't have other effect on the flash (except TTL mode).</p><p></p><p>The alternatives when trying to properly expose the ambient indoors with flash is a slow shutter speed, and a high ISO, and mixed white balance, etc.</p><p></p><p>Just some notions. Everyone has their own ideas. But Nikon default flash metering is TTL BL, which is automaton for flash compensation.</p></blockquote><p></p>
[QUOTE="WayneF, post: 557187, member: 12496"] [I] Getting out of TTL BL, into TTL mode, would do it. I used to imagine that additional flash compensation worked with TTL BL, and indoors in insignificant ambient, it will vary the flash level, but when the ambient is fully exposed, TTL BL has its own mind about what fill compensation is to be used. That's what the TTL BL mode does. Flashes like SB-800, SB-600, SB-900, SB-910 have a menu to force TTL or TTL BL mode. Makes it very easy. Why Nikon is giving that up is a mystery to me. It ought to be a menu in the camera. [/I][I] It is not the flash. TTL BL is the Nikon flash metering system default, unless overridden into TTL mode. It is Yongnuo flash too, etc. Balancing background with a Spot is not feasible (is nonsense), so Spot Metering shifts the flash mode to TTL (does not balance). The flash metering Never does actual Spot metering, but the ambient does. [/I] That can work indoors, with insignificantly exposed ambient (at least reduced significantly, when Spot metering problems of underexposed ambient is not a concern). It is still TTL BL (in Exif), but it acts like TTL flash with insignificant ambient. Flash compensation works. But moving outdoors into sunshine can bring diffrences of Spot metering of ambient. Novices imagine Spot metering should produce the spot as correctly exposed. It does NOT... it only produces middle gray at the spot. Which can be correct if the spot should be middle gray, but if spot metering on a face, we sure better open exposure about 1 stop more. Faces are typically not middle gray. Spot metering is not point & shoot, we have to consider the spot, carefully. But it only affects ambient, and indoors with insignificant ambient (underexposed), it doesn't have other effect on the flash (except TTL mode). The alternatives when trying to properly expose the ambient indoors with flash is a slow shutter speed, and a high ISO, and mixed white balance, etc. Just some notions. Everyone has their own ideas. But Nikon default flash metering is TTL BL, which is automaton for flash compensation. [/QUOTE]
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Nikon DSLR Cameras
D750
how your auto iso and flash works ?
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