When the weather is at its worst, Nikon® PROSTAFF 3S 10x42mm Binoculars are at their best... delivering bright, clear images from a compact, waterproof / fogproof, easily packable platform. Multi-coated optics ensure optimum light transmission, while an extra-wide field-of-view, long eye relief and rubber armored exterior allow for easy operation and great feel. Plus, PROSTAFF 3S Binoculars feature an optical system created from lead-and-arsenic-free Eco-Glass. So you're helping the environment, just by owning them.

Brighter. Clearer. Here's why...

<!--begin-bvseo-questions--><!--begin-questions--><div id="bvseo-questionsSection"> <div class="bvseo-question-answer" data-questionid="2223521"> <h2 class="bvseo-question"> WHAT PRISM BAK4 OR WHAT </h2> <div class="bvseo-question-detail"> </div> <div class="bvseo-author">Asked by: BOB 53</div> <div class="bvseo-answer" data-answerid="2484060"> Thank you for your question.&#13;&#10;&#13;&#10;Nikon does not specify the type of glass in the roof prism, other than to say that it has &amp;quot;High-reflectivity silver-alloy mirror coating applied on the mirror surfaces of the prisms for a bright and clear view.&amp;quot; <div class="bvseo-author">Answered by: Jim Product Specialist</div> <div class="bvseo-pubdate">Date published: 2017-05-24</div> </div> </div></div><script type="text/javascript"> if (document.getElementById('bvseo-questionsSection')) { document.getElementById('bvseo-questionsSection').style.display = 'none'; }</script><!--end-questions--><ul id="BVSEO_meta" style="display:none!important"> <li data-bvseo="bvDateModified">y_2017, m_7, d_25, h_12CST</li> <li data-bvseo="ps">bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1</li> <li data-bvseo="cp">cp_1, bvpage1</li> <li data-bvseo="co">co_hasquestionsanswers, tq_1</li> <li data-bvseo="cf">loc_en_US, sid_665651, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]</li> <li data-bvseo="diagnostics">clientName_sportmansguide</li></ul><!--end-bvseo-questions--><!--BVSEO|dz:Main_Site-en_US|sdk:v1.0.7.0-n|msg:timer 15ms -->