WonderPana 186mm Slim Neutral Density 16 (4-Stop) Filter - Slim ND16 Filter works with WonderPana 186 Systems<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"> Premium Grade Optical Glass Filter; High Quality， Single Threaded， Slim ND16 Filter; Premium Grade Anodized Aluminum Ring， 186mm x 1mm Standard Filter Thread </span></li><li><span class="a-list-item"> Enables slow shutter speeds to be used， allowing film to record movement in subjects such as waterfalls， clouds， or cars </span></li><li><span class="a-list-item"> Decrease depth of field by allowing wider apertures to be used， in turn helping to separate subjects from their background </span></li><li><span class="a-list-item"> Other 186mm Filters Include: MC-UV， CPL， MC-CPL， Slim ND4/8/32/1000 </span></li><li><span class="a-list-item"> 24-Month Manufacturer Warranty </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51CW22UfwaL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41-AeIXWPgL.jpg" noproxy>