Feature:Prism material: BAK9Recently Focal length: 2M<br /><img src="//agdetail.image-gmkt.com/m430/261/686/543686261/img/agdetail.image-gmkt.com/261/686/543686261/img/img6.eachbuyer.com/x9/p100/eb7174_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/261/686/543686261/img/agdetail.image-gmkt.com/261/686/543686261/img/img6.eachbuyer.com/x9/p100/eb7174_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/261/686/543686261/img/agdetail.image-gmkt.com/261/686/543686261/img/img6.eachbuyer.com/x9/p100/eb7174_3.jpg" />