JJC FX-N910 Flash Multiplier Extender for NIKON SB-900 SB-910 ，300mm+ Telephoto Lens Use<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Allows you to shoot at greater distances </span></li><li><span class="a-list-item"> Excellent for photography on wildlife， birding， wedding， evening party， portraits and more </span></li><li><span class="a-list-item"> Allows you to shoot at greater distances and shoot with smaller apertures </span></li><li><span class="a-list-item"> The unit helps increase the flash output by about 2 to 4 f/stops or more </span></li><li><span class="a-list-item"> Increases the flash output by about 2 to 3 f/stops </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41yENX05SfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41yVxydOlcL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41xPgz%2BN84L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41gmxiLTJ-L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51zc-lwPlzL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51NqOM1ZhZL.jpg" noproxy>