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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: 556686" data-attributes="member: 12496"><p>How much EV is "whatever is seen necessary to get the results you want". Sorry, that is too general to be able to answer. It depends. There are so many variables... flash mode iTTL or Manual? Camera mode, A, S, P, M? Bright or dim ambient? Indoors or outdoors?</p><p></p><p>Indoors (assuming low and reasonable ISO), ambient will be insignificant and flash is the main light, so flash compensation is only used to adjust desired TTL flash exposure. More to be brighter, less to not be so bright, as seen needed for the result you want.</p><p></p><p>Outdoors in sun, flash compensation is usually set perhaps near -2 EV to provide a lower fill level, to prevent overexposing the subject with two exposures, flash plus ambient. Some like to underexpose ambient a bit, others don't. It depends...</p><p></p><p>High ISO is mostly only for low level ambient alone. Or we use flash instead to provide light, but doing both is not a good idea. Bounce flash indoors typically needs maybe ISO 400 in order to have sufficient flash power (but which depends on bounce ceiling). It often needs a bit of +EV to make it bright enough (simply as seen needed). ISO 100 should be enough for direct flash. Distant dark backgrounds can cause direct flash to overexpose a bit. Either way, just do what you see is needed.</p><p></p><p>If you want only one answer for all situations, then camera P mode and iTTL flash mode (esp good out in bright sun), but there can be better choices. It is full automation, but wedding photographers moving between indoors and outdoors joke and call P mode as "Professional Mode", since its automation can accommodate most flash situations. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> Again, compensate to do what you see is needed.</p><p></p><p>Shutter speed will depend on what camera mode you are using. Outdoors in sun should be no issue, likely 1/250 second on the D750.</p><p></p><p>Camera A mode will use 1/60 second with flash <strong>indoors</strong>. This is Minimum shutter speed with flash (in A and P modes), and you can make this be slower with menu E2 (or Slow or Rear Curtain sync modes), but the only way to make it faster n A or P mode is to go out into brighter ambient light. The camera meters the ambient, and the flash has to work into that result. 1/60 second can pick up some of the ambient, and the orange incandescents can warm it some (might be desirable, might be ojectionable).</p><p></p><p>So, instead camera M mode works great with flash indoors. M mode is about the ambient, and the ambient will be too low to matter, we're using flash instead. Then you can set any shutter speed you want (up to 1/250 second maximum), and any aperture, and then iTTL or your manual power settings will handle the flash. TTL flash is still automatic flash, even in camera M mode. </p><p></p><p>A little experience will see several things to help understanding, and then each situation should become mostly obvious.</p><p></p><p>Bottom line, simply do what you see you need to do.</p></blockquote><p></p>
[QUOTE="WayneF, post: 556686, member: 12496"] How much EV is "whatever is seen necessary to get the results you want". Sorry, that is too general to be able to answer. It depends. There are so many variables... flash mode iTTL or Manual? Camera mode, A, S, P, M? Bright or dim ambient? Indoors or outdoors? Indoors (assuming low and reasonable ISO), ambient will be insignificant and flash is the main light, so flash compensation is only used to adjust desired TTL flash exposure. More to be brighter, less to not be so bright, as seen needed for the result you want. Outdoors in sun, flash compensation is usually set perhaps near -2 EV to provide a lower fill level, to prevent overexposing the subject with two exposures, flash plus ambient. Some like to underexpose ambient a bit, others don't. It depends... High ISO is mostly only for low level ambient alone. Or we use flash instead to provide light, but doing both is not a good idea. Bounce flash indoors typically needs maybe ISO 400 in order to have sufficient flash power (but which depends on bounce ceiling). It often needs a bit of +EV to make it bright enough (simply as seen needed). ISO 100 should be enough for direct flash. Distant dark backgrounds can cause direct flash to overexpose a bit. Either way, just do what you see is needed. If you want only one answer for all situations, then camera P mode and iTTL flash mode (esp good out in bright sun), but there can be better choices. It is full automation, but wedding photographers moving between indoors and outdoors joke and call P mode as "Professional Mode", since its automation can accommodate most flash situations. :) Again, compensate to do what you see is needed. Shutter speed will depend on what camera mode you are using. Outdoors in sun should be no issue, likely 1/250 second on the D750. Camera A mode will use 1/60 second with flash [B]indoors[/B]. This is Minimum shutter speed with flash (in A and P modes), and you can make this be slower with menu E2 (or Slow or Rear Curtain sync modes), but the only way to make it faster n A or P mode is to go out into brighter ambient light. The camera meters the ambient, and the flash has to work into that result. 1/60 second can pick up some of the ambient, and the orange incandescents can warm it some (might be desirable, might be ojectionable). So, instead camera M mode works great with flash indoors. M mode is about the ambient, and the ambient will be too low to matter, we're using flash instead. Then you can set any shutter speed you want (up to 1/250 second maximum), and any aperture, and then iTTL or your manual power settings will handle the flash. TTL flash is still automatic flash, even in camera M mode. A little experience will see several things to help understanding, and then each situation should become mostly obvious. Bottom line, simply do what you see you need to do. [/QUOTE]
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Nikon DSLR Cameras
D750
how your auto iso and flash works ?
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