<DIV class=quote><B>以下是引用<I>erin0919</I>在2006-6-14 14:32:52的发言：</B><br>
<P>好在手头有不少手电，又找来两个光杯口径相同的作对比，大家再来看看这2个手电的对比：Aleph1与27LT，都是McR的杯子。</P>
<P><img src="attachments/dvbbs/2006-6/200661414295894576.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-6/200661414295894576.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P><br><img src="attachments/dvbbs/2006-6/200661414302380744.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-6/200661414302380744.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P>两者使用的光杯直径都是27mm，但是光杯深度不同：A1为15.32mm，27LT为27.24mm。所产生的照射效果也及其相似于钛AA和L1P，下图超近距离8cm处A1有明显暗斑，27LT非常完美。</P>
<P><img src="attachments/dvbbs/2006-6/200661414304827058.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-6/200661414304827058.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P>下图距离30cm出的光斑也如钛AA和L1P，反光杯深的手电27LT光斑(含泛光和聚光)面积较小，A1的光斑较大。这点与钛AA和L1P相似，因为钛AA的光杯比L1P深2mm。</P>
<P><img src="attachments/dvbbs/2006-6/20066141431989158.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-6/20066141431989158.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P>距离2.5米是的光斑可以看出27LT的聚光要明显好于A1，这或许也是因为反光杯的深浅所至吧。</P>
<P><img src="attachments/dvbbs/2006-6/200661414313577040.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-6/200661414313577040.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br></P>
<P>所以：口径一样的光杯可以做出不同的深度，因而带来的照射效果也是不同的。超近距离中心暗斑越小或暗斑产生距离越近说明了光杯制作工艺的提高，并不能说明聚光不好。</P>我用近距离光斑推论远距离聚光是有不妥，不过L1P肯定不是聚光最理想的光杯，eddy的杯子会更完美。<br></DIV>
<P>我有个建议:<br>
<P>如果不是需要分析,推理,也就无需严谨,也不必说很多道理. </P>
<P>用另一种风格,现实到位,<br></P>
<P>找个8--10米,有必要就15米的距离,实际试一下,....不谈完美,只见效果. 也就简简单单. 只要把握和证明条件就可以了. 这并不算难.</P>
[此贴子已经被作者于2006-6-15 12:32:14编辑过]
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楼主: erin0919
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发表于 2006-6-15 02:45
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