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Nikon DSLR Cameras
D7100
EV values in display?
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<blockquote data-quote="WayneF" data-source="post: 308286" data-attributes="member: 12496"><p>See the EV chart I guess.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Doesn't the origin at f/1.0 at 1 second being numbered EV 0 sound extremely arbitrary? Convenient? What is it an exposure of? Even if you imagine it says ISO 100 (It doesn't mention ISO), what is it an exposure of? Rhetorical, but what is the theoretical origin of your notions of ISO 100? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>You are close to the right idea with the concept of equivalent exposures. EV is in fact just a name for the set of shutter/aperture combinations which give an Equivalent Exposure. Not absolute, just relative. Not any one exposure, no ISO, just a name for the numerical set of equivalent shutter/aperture combinations. </p><p></p><p>If you increase shutter speed one stop, and open aperture one stop, that is still equivalent exposure<strong> at any ISO</strong>. If you only change one of them, that moves you to the next row. That's what the EV chart shows.</p><p></p><p>OK, you can pretend to arbitrarily assign an ISO, and then make claims for your new concept regarding exposures, so long as you always explain about your ISO. But ISO is not in the chart.</p></blockquote><p></p>
[QUOTE="WayneF, post: 308286, member: 12496"] See the EV chart I guess.. :) Doesn't the origin at f/1.0 at 1 second being numbered EV 0 sound extremely arbitrary? Convenient? What is it an exposure of? Even if you imagine it says ISO 100 (It doesn't mention ISO), what is it an exposure of? Rhetorical, but what is the theoretical origin of your notions of ISO 100? :) You are close to the right idea with the concept of equivalent exposures. EV is in fact just a name for the set of shutter/aperture combinations which give an Equivalent Exposure. Not absolute, just relative. Not any one exposure, no ISO, just a name for the numerical set of equivalent shutter/aperture combinations. If you increase shutter speed one stop, and open aperture one stop, that is still equivalent exposure[B] at any ISO[/B]. If you only change one of them, that moves you to the next row. That's what the EV chart shows. OK, you can pretend to arbitrarily assign an ISO, and then make claims for your new concept regarding exposures, so long as you always explain about your ISO. But ISO is not in the chart. [/QUOTE]
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Nikon DSLR Cameras
D7100
EV values in display?
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