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Nikon DSLR Cameras
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<blockquote data-quote="DraganDL" data-source="post: 280341" data-attributes="member: 18251"><p>Just to be completely clear: not being able to work in a TTL mode (measuring the amount of light and other elements "through-the-lens"), does not necessarily mean that the flash isn't capable of working in a "traditional" auto mode, where you set: 1) the lens's aperture value manually (either in the camera's menu or by turning the aperture ring on the lens); 2) the shutter speed(s); the ISO value in the camera and 4) the ISO value on the flash unit which is "tied" to the specified range of aperture values. In such scenario the flash unit automatically regulates the emitted amount of light within the given environment, within the specified distance range (e.g. 1.5-5 meters) thanks to it's own (built in) light meter and it's (flash unit's) sensor.</p><p></p><p>However, there ARE flash units that can operate ONLY in a pure manual mode. In such case, you've got to use an external flash meter (or to rely on a flash unit's "guide number"), you've got to make a test flash during which the light meter measures the total reflected light and displays the values according to which you set your camera. And, since such flash unit isn't capable of adjusting the amount of the delivered light within the distance range, each time you recompose (and the distance changes) you've got to measure the reflected light again (because, what the flash meter gave you as the right parameters was applicable for the distance of, say, 3 meters - since you've moved the flash away from the subject, to, say, a 4.5 meters, you've got to manually set the greater value of aperture (smaller number) or to raise the ISO value, or to do both).</p><p></p><p>Conclusion: the "traditional auto" ("old school automatic" <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" />) regulates the amount of delivered light within the specified distance range (once you set the specific parameters for that range), the TTL auto gives more options over the traditional auto, and the "full manual" flash unit requires you to change parameters with every change of the distance (between the flash unit and the subject).</p></blockquote><p></p>
[QUOTE="DraganDL, post: 280341, member: 18251"] Just to be completely clear: not being able to work in a TTL mode (measuring the amount of light and other elements "through-the-lens"), does not necessarily mean that the flash isn't capable of working in a "traditional" auto mode, where you set: 1) the lens's aperture value manually (either in the camera's menu or by turning the aperture ring on the lens); 2) the shutter speed(s); the ISO value in the camera and 4) the ISO value on the flash unit which is "tied" to the specified range of aperture values. In such scenario the flash unit automatically regulates the emitted amount of light within the given environment, within the specified distance range (e.g. 1.5-5 meters) thanks to it's own (built in) light meter and it's (flash unit's) sensor. However, there ARE flash units that can operate ONLY in a pure manual mode. In such case, you've got to use an external flash meter (or to rely on a flash unit's "guide number"), you've got to make a test flash during which the light meter measures the total reflected light and displays the values according to which you set your camera. And, since such flash unit isn't capable of adjusting the amount of the delivered light within the distance range, each time you recompose (and the distance changes) you've got to measure the reflected light again (because, what the flash meter gave you as the right parameters was applicable for the distance of, say, 3 meters - since you've moved the flash away from the subject, to, say, a 4.5 meters, you've got to manually set the greater value of aperture (smaller number) or to raise the ISO value, or to do both). Conclusion: the "traditional auto" ("old school automatic" ;)) regulates the amount of delivered light within the specified distance range (once you set the specific parameters for that range), the TTL auto gives more options over the traditional auto, and the "full manual" flash unit requires you to change parameters with every change of the distance (between the flash unit and the subject). [/QUOTE]
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