Meike FC-100 Macro Ring Flash Light For Nikon Canon Fuji DSLR Camera<br>Description:<br>The Led Macro Flash is the perfect choice for the photographer if you requires shadow free illumination. It is designed for close up， macro， medical， scientific and forensic photography as the flash light source is positioned directly between the camera lens and subject providing an even illumination.<br>Feature:<br>Can adjust flash distanceWith constant light and flash functionTo determine the set can be pre flash flash brightnessCan press any key to activate or camera shutter activationAn annular structure is composed of 32 high brightness LEDCirculating switching FLASH full flash， flash L or R flash， flexible useCan be set to add three flash compensation or minus three flash compensation<br>Specification:<br>Brand: MeikeModel Number: FC-100Guide Number: 15GNFlash Range: 5cm - 150cmColor Temperature: 5500kExposure Time: 1\/100 secondsPower Supply: 4 x AA BatteriesDimension: 165 x 98 x 128mmWeight(without battery): Approx. 170gSuitable for Caliber: 77mm 72mm 67mm 62mm 58mm 55mm 52mmFit for: macro shot， scientific research， medical and personal hobbies of photographyFour Working Mode: Light mode， Flash mode， L mode(Left half of the annular flash)， R mode(right half of the annular flash)<br>The Basic Function:<br>          Components       Operation           Power switch       Long press this button 2 second can be open or closed flash power supply，Recommend removing the battries after through this button to close the flash power supply           Model switch button       Each time your press，flash mode in turn change between in FLASH\/ L\/ R           Power adjustment button &amp;lt; Left &amp;gt; &amp;lt; Right &amp;gt; button       Through this button can adjust the flash output power           Light &amp;lt; Button &amp;gt;       The flash light is keep lighting through this button.Used in video shooting and special macro photography           Pilot &amp;lt; Button &amp;gt;       Press this button can test the flash output brightness   <br>Turn on and Turn off<br>1. A long press the Power Switch two second can be open or closed flash power.Recommend removing the battries after through this button to close the flash power supply.2. You can press &amp;lt; Pilot &amp;gt; button to test flash is normal or not.3. If indicator of the flash light is flicker ，now need to replace new battery.4. It can be power off. After using lone  press &amp;lt; Power Switch &amp;gt; 2 seconds.<br>Light Mode<br>Using LIGHT button，the annular light is lighting ，Used in video shooting and special macro photography.<br>Flash Mode<br>Through the &amp;lt; Mode Switch Button &amp;gt; flash light into flash mode.<br>L and R Mode <br>Through mode button switch to  &amp;lt; L &amp;gt; the  left half of the annular flash  &amp;lt; R &amp;gt; the right half of the annular flash，through L and R function can let picture more third dimension.<br>The solution a