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Einteins vs Elinchrom RX series
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<blockquote data-quote="WayneF" data-source="post: 199851" data-attributes="member: 12496"><p>Maybe at full power level, it might be. Will you always be working at full power level? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> Better also buy a white card. <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>But its color will shift towards red at lower power. The lower the power setting, then the more red. <strong> All voltage controlled monolights do that</strong>, it is simply how flash tubes work (spectrum changes with current density through the tube). Except the Einstein. This is the Really Big Deal about the Einstein. But, it is not hard to work around this with any conventional studio light either, it has always been this way, and we get by.</p><p></p><p></p><p>The details are like this.</p><p></p><p>Voltage controlled monolights shift color to become more red at low power.</p><p>Here is an example: </p><p><a href="http://www.prophotohome.com/forum/lighting-equipment-technique/35618-profoto-vs-white-lightning-vs-elinchrom-results.html" target="_blank">Profoto vs White Lightning vs Elinchrom Results - Pro Photo HOME</a></p><p></p><p>I would not swear the numbers are precise (very difficult to measure well), but it is the idea. It is simply how life is (no matter what the specs might report). Most specs try to ignore it.</p><p></p><p>In contrast, camera speedlights are not voltage controlled. They always recycle to full voltage, and lower power levels are implemented by cutting off the current pulse very quickly, to not put out so much light. We used to call this thyristor type, but it is done today with a chip called IGBT (insulated gate bipolar transistsor). These become very FAST at low power (called speedlights), and since the decaying slow red tail is cut off, speedlights become more blue at low power. Speedlights are the opposite of monolights, in both color shift and speed duration.</p><p></p><p>Einstein is very special because it combines <strong>both designs</strong>, and a computer to control it, both methods used at same time, to offset one methods color shift with the other method doing the opposite shift. The goal is to be constant color regardless of power level. But it has two modes, one claims Constant Color at any power level. Other monolights cannot possibly make any mention of such a claim. The other mode abandons that constant color goal, and works only like a speedlight, becoming very fast at lower power levels.</p></blockquote><p></p>
[QUOTE="WayneF, post: 199851, member: 12496"] Maybe at full power level, it might be. Will you always be working at full power level? :) Better also buy a white card. :) But its color will shift towards red at lower power. The lower the power setting, then the more red. [B] All voltage controlled monolights do that[/B], it is simply how flash tubes work (spectrum changes with current density through the tube). Except the Einstein. This is the Really Big Deal about the Einstein. But, it is not hard to work around this with any conventional studio light either, it has always been this way, and we get by. The details are like this. Voltage controlled monolights shift color to become more red at low power. Here is an example: [URL="http://www.prophotohome.com/forum/lighting-equipment-technique/35618-profoto-vs-white-lightning-vs-elinchrom-results.html"]Profoto vs White Lightning vs Elinchrom Results - Pro Photo HOME[/URL] I would not swear the numbers are precise (very difficult to measure well), but it is the idea. It is simply how life is (no matter what the specs might report). Most specs try to ignore it. In contrast, camera speedlights are not voltage controlled. They always recycle to full voltage, and lower power levels are implemented by cutting off the current pulse very quickly, to not put out so much light. We used to call this thyristor type, but it is done today with a chip called IGBT (insulated gate bipolar transistsor). These become very FAST at low power (called speedlights), and since the decaying slow red tail is cut off, speedlights become more blue at low power. Speedlights are the opposite of monolights, in both color shift and speed duration. Einstein is very special because it combines [B]both designs[/B], and a computer to control it, both methods used at same time, to offset one methods color shift with the other method doing the opposite shift. The goal is to be constant color regardless of power level. But it has two modes, one claims Constant Color at any power level. Other monolights cannot possibly make any mention of such a claim. The other mode abandons that constant color goal, and works only like a speedlight, becoming very fast at lower power levels. [/QUOTE]
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