<\/button>Contact Form<\/span><\/i><\/span><\/button><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>Name*<\/span><\/label><\/div><\/div><\/div><\/div><\/div>Email*<\/span><\/label><\/div><\/div><\/div><\/div><\/div>Country<\/label><\/div><\/div><\/div><\/div><\/div>Company \/ Organization<\/label><\/div><\/div><\/div><\/div><\/div>Detailed Messages*<\/span><\/label><\/div><\/textarea><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-submit quform-element-1_7 quform-cf quform-button-style-hollow\"><div class=\"quform-button-back quform-button-back-default quform-button-back-1_7\"><button name=\"quform_submit\" type=\"submit\" class=\"quform-back\" value=\"back\"><span class=\"quform-button-text quform-button-back-text\">Back<\/span><\/button><\/div><div class=\"quform-button-submit quform-button-submit-default quform-button-submit-1_7\"><button name=\"quform_submit\" type=\"submit\" class=\"quform-submit\" value=\"submit\"><span class=\"quform-button-text quform-button-submit-text\">Send<\/span><\/button><\/div><div class=\"quform-loading quform-loading-position-left quform-loading-type-spinner-1\"><div class=\"quform-loading-inner\"><div class=\"quform-loading-spinner\"><div class=\"quform-loading-spinner-inner\"><\/div><\/div><\/div><\/div><\/div><div class=\"quform-element-tree\"><label for=\"quform_1_0_9e6387\">This field should be left blank<\/label><input type=\"text\" id=\"quform_1_0_9e6387\" name=\"quform_1_0\" class=\"quform-field quform-field-tree quform-field-1_0\" tabindex=\"-1\" autocomplete=\"off\" \/><\/div><\/div><\/div><\/div><\/div><\/form><\/div><\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:0%;--awb-width-medium:50%;--awb-spacing-right-medium:3.84%;--awb-spacing-left-medium:0%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;width:100%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:#e2e2e2;border-top-width:1px;\"><\/div><\/div><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-one\"><h1 class=\"fusion-title-heading title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:32;line-height:1.3;\"><h3><strong>Porro Prism<\/strong><\/h3>\n<h1 style=\"line-height: 18.0pt; background: white; vertical-align: baseline; margin: 0cm 0cm 6.0pt 0cm;\"><\/h1><\/h1><\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-2 fusion_builder_column_inner_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:0%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:3.84%;--awb-width-medium:50%;--awb-spacing-right-medium:0%;--awb-spacing-left-medium:3.84%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\"><p><b>Material:<br \/><\/b><b><span style=\"color: #757575;\">N-BK7<\/span><\/b><\/p>\n<\/div><div class=\"fusion-text fusion-text-3\"><p><b>Surface Flatness:<br \/><\/b><b><span style=\"color: #757575;\">N\uff1c3,\u25b3N\uff1c1<\/span><\/b><\/p>\n<\/div><div class=\"fusion-text fusion-text-4\"><p><b>Chips:<br \/><\/b><b><span style=\"color: #757575;\"><0.2mm<\/span><\/b><\/p>\n<\/div><div class=\"fusion-text fusion-text-5\"><p><b>Dimension Tolerance:<br \/><\/b><b><span style=\"color: #808080;\">\u00b10.15mm<\/span><\/b><\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-3 fusion_builder_column_inner_1_2 1_2 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.84%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:0%;--awb-width-medium:50%;--awb-spacing-right-medium:3.84%;--awb-spacing-left-medium:0%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-6\"><p><b>Surface Quality:<br \/><\/b><b><span style=\"color: #757575;\">60\/40~40\/20<\/span><\/b><\/p>\n<\/div><div class=\"fusion-text fusion-text-7\"><p><b>Clear Aperture:<br \/><\/b><b><span style=\"color: #757575;\">>80%<\/span><\/b><\/p>\n<\/div><div class=\"fusion-text fusion-text-8\"><p><b>Angle Tolerance:<br \/><\/b><b><span style=\"color: #808080;\">\u00b130”~\u00b13′<\/span><\/b><\/p>\n<\/div><div class=\"fusion-text fusion-text-9\"><p><b>Coating:<br \/><\/b><b><span style=\"color: #757575;\">Uncoated,<br \/><\/span><\/b><b><span style=\"color: #757575;\">Single Layer <\/span><span style=\"color: #757575;\">MgF2,<br \/>\nAR@450-650nm<br \/><\/span><\/b><b><span style=\"color: #757575;\">AR@450-650nm<\/span><\/b><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-tabs fusion-tabs-1 classic nav-is-justified horizontal-tabs icon-position-left mobile-mode-accordion\" style=\"--awb-title-border-radius-top-left:0px;--awb-title-border-radius-top-right:0px;--awb-title-border-radius-bottom-right:0px;--awb-title-border-radius-bottom-left:0px;--awb-inactive-color:#eaeaeb;--awb-background-color:#ffffff;--awb-border-color:#e2e2e2;--awb-active-border-color:#e4042d;\"><div class=\"nav\"><ul class=\"nav-tabs nav-justified\" role=\"tablist\"><li class=\"active\" role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-67afeaa2178422b3ff5\" aria-selected=\"true\" id=\"fusion-tab-overview\" href=\"#tab-67afeaa2178422b3ff5\"><h4 class=\"fusion-tab-heading\">Overview<\/h4><\/a><\/li><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-122915a13a3f8c08f91\" aria-selected=\"false\" tabindex=\"-1\" id=\"fusion-tab-mainspecification\" href=\"#tab-122915a13a3f8c08f91\"><h4 class=\"fusion-tab-heading\">Main Specification<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-content\"><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs nav-justified\" role=\"tablist\"><li class=\"active\" role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-67afeaa2178422b3ff5\" aria-selected=\"true\" id=\"mobile-fusion-tab-overview\" href=\"#tab-67afeaa2178422b3ff5\"><h4 class=\"fusion-tab-heading\">Overview<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix in active\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-overview\" id=\"tab-67afeaa2178422b3ff5\">\n<h5><strong>Porro prisms<\/strong> are variants of the standard 90\u00b0 prism but used as a pair to displace and invert a beam. Porro prisms are widely used in binoculars where they orientate the image correctly and reduce the total length of the binoculars by a small amount.<\/h5>\n<h3><span style=\"font-size: 14pt;\"><div id=\"quform-9ec5a7\" class=\"quform quform-1 quform-theme-hollow quform-support-page-caching quform-is-first-page\"><form id=\"quform-form-9ec5a7\" class=\"quform-form quform-form-1\" action=\"\/index.php\/wp-json\/wp\/v2\/pages\/2730#quform-9ec5a7\" method=\"post\" enctype=\"multipart\/form-data\" novalidate=\"novalidate\" data-options=\"{"id":1,"uniqueId":"9ec5a7","theme":"hollow","ajax":true,"logic":{"logic":[],"dependents":[],"elementIds":[],"dependentElementIds":[],"animate":true},"currentPageId":1,"errorsIcon":"","updateFancybox":true,"hasPages":true,"pages":[1,6],"pageProgressType":"","tooltipsEnabled":true,"tooltipClasses":"qtip-quform-dark qtip-shadow","tooltipMy":"left center","tooltipAt":"right center","isRtl":false,"scrollOffset":-50,"scrollSpeed":800}\"><button class=\"quform-default-submit\" name=\"quform_submit\" type=\"submit\" value=\"submit\" aria-hidden=\"true\" tabindex=\"-1\"><\/button><div class=\"quform-form-inner quform-form-inner-1\"><input type=\"hidden\" name=\"quform_form_id\" value=\"1\" \/><input type=\"hidden\" name=\"quform_form_uid\" value=\"9ec5a7\" \/><input type=\"hidden\" name=\"quform_count\" value=\"2\" \/><input type=\"hidden\" name=\"form_url\" value=\"https:\/\/www.szlaser.com\/index.php\/wp-json\/wp\/v2\/pages\/2730\" \/><input type=\"hidden\" name=\"referring_url\" value=\"\" \/><input type=\"hidden\" name=\"post_id\" value=\"\" \/><input type=\"hidden\" name=\"post_title\" value=\"\" \/><input type=\"hidden\" name=\"quform_current_page_id\" value=\"1\" \/><input type=\"hidden\" name=\"quform_csrf_token\" value=\"Vnh6A6UgdJX1km7qfmVY5IFMhJM4oxtt8kztz5Y3\" \/><div class=\"quform-elements quform-elements-1 quform-cf quform-responsive-elements-phone-landscape\"><div class=\"quform-element quform-element-page quform-page-1 quform-page-1_1 quform-cf quform-group-style-plain quform-first-page quform-current-page\"><div class=\"quform-child-elements\"><div class=\"quform-element quform-element-submit quform-element-1_4 quform-cf quform-button-style-hollow quform-button-width-full\"><div class=\"quform-button-next quform-button-next-default quform-button-next-1_4 quform-button-icon-right\"><button name=\"quform_submit\" type=\"submit\" class=\"quform-next\" value=\"submit\"><span class=\"quform-button-text quform-button-next-text\">Contact Form<\/span><span class=\"quform-button-icon quform-button-next-icon\"><i class=\"fa fa-pencil-square-o\"><\/i><\/span><\/button><\/div><div class=\"quform-loading quform-loading-position-left quform-loading-type-spinner-1\"><div class=\"quform-loading-inner\"><div class=\"quform-loading-spinner\"><div class=\"quform-loading-spinner-inner\"><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-page quform-page-6 quform-page-1_6 quform-cf quform-group-style-plain quform-last-page\"><div class=\"quform-child-elements\"><div class=\"quform-element quform-element-text quform-element-1_8 quform-cf quform-element-required\"><div class=\"quform-spacer\"><div class=\"quform-label quform-label-1_8\"><label class=\"quform-label-text\" for=\"quform_1_8_9ec5a7\">Name<span class=\"quform-required\">*<\/span><\/label><\/div><div class=\"quform-inner quform-inner-text quform-inner-1_8\"><div class=\"quform-input quform-input-text quform-input-1_8 quform-cf\"><input type=\"text\" id=\"quform_1_8_9ec5a7\" name=\"quform_1_8\" class=\"quform-field quform-field-text quform-field-1_8\" \/><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-text quform-element-1_9 quform-cf quform-element-required\"><div class=\"quform-spacer\"><div class=\"quform-label quform-label-1_9\"><label class=\"quform-label-text\" for=\"quform_1_9_9ec5a7\">Email<span class=\"quform-required\">*<\/span><\/label><\/div><div class=\"quform-inner quform-inner-text quform-inner-1_9\"><div class=\"quform-input quform-input-text quform-input-1_9 quform-cf\"><input type=\"text\" id=\"quform_1_9_9ec5a7\" name=\"quform_1_9\" class=\"quform-field quform-field-text quform-field-1_9\" \/><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-text quform-element-1_10 quform-cf quform-element-optional\"><div class=\"quform-spacer\"><div class=\"quform-label quform-label-1_10\"><label class=\"quform-label-text\" for=\"quform_1_10_9ec5a7\">Country<\/label><\/div><div class=\"quform-inner quform-inner-text quform-inner-1_10\"><div class=\"quform-input quform-input-text quform-input-1_10 quform-cf\"><input type=\"text\" id=\"quform_1_10_9ec5a7\" name=\"quform_1_10\" class=\"quform-field quform-field-text quform-field-1_10\" \/><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-text quform-element-1_12 quform-cf quform-element-optional\"><div class=\"quform-spacer\"><div class=\"quform-label quform-label-1_12\"><label class=\"quform-label-text\" for=\"quform_1_12_9ec5a7\">Company \/ Organization<\/label><\/div><div class=\"quform-inner quform-inner-text quform-inner-1_12\"><div class=\"quform-input quform-input-text quform-input-1_12 quform-cf\"><input type=\"text\" id=\"quform_1_12_9ec5a7\" name=\"quform_1_12\" class=\"quform-field quform-field-text quform-field-1_12\" \/><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-textarea quform-element-1_13 quform-cf quform-element-required\"><div class=\"quform-spacer\"><div class=\"quform-label quform-label-1_13\"><label class=\"quform-label-text\" for=\"quform_1_13_9ec5a7\">Detailed Messages<span class=\"quform-required\">*<\/span><\/label><\/div><div class=\"quform-inner quform-inner-textarea quform-inner-1_13\"><div class=\"quform-input quform-input-textarea quform-input-1_13 quform-cf\"><textarea id=\"quform_1_13_9ec5a7\" name=\"quform_1_13\" class=\"quform-field quform-field-textarea quform-field-1_13\"><\/textarea><\/div><\/div><\/div><\/div><div class=\"quform-element quform-element-submit quform-element-1_7 quform-cf quform-button-style-hollow\"><div class=\"quform-button-back quform-button-back-default quform-button-back-1_7\"><button name=\"quform_submit\" type=\"submit\" class=\"quform-back\" value=\"back\"><span class=\"quform-button-text quform-button-back-text\">Back<\/span><\/button><\/div><div class=\"quform-button-submit quform-button-submit-default quform-button-submit-1_7\"><button name=\"quform_submit\" type=\"submit\" class=\"quform-submit\" value=\"submit\"><span class=\"quform-button-text quform-button-submit-text\">Send<\/span><\/button><\/div><div class=\"quform-loading quform-loading-position-left quform-loading-type-spinner-1\"><div class=\"quform-loading-inner\"><div class=\"quform-loading-spinner\"><div class=\"quform-loading-spinner-inner\"><\/div><\/div><\/div><\/div><\/div><div class=\"quform-element-tree\"><label for=\"quform_1_0_9ec5a7\">This field should be left blank<\/label><input type=\"text\" id=\"quform_1_0_9ec5a7\" name=\"quform_1_0\" class=\"quform-field quform-field-tree quform-field-1_0\" tabindex=\"-1\" autocomplete=\"off\" \/><\/div><\/div><\/div><\/div><\/div><\/form><\/div><\/span><\/h3>\n<\/div><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs nav-justified\" role=\"tablist\"><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-122915a13a3f8c08f91\" aria-selected=\"false\" tabindex=\"-1\" id=\"mobile-fusion-tab-mainspecification\" href=\"#tab-122915a13a3f8c08f91\"><h4 class=\"fusion-tab-heading\">Main Specification<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-mainspecification\" id=\"tab-122915a13a3f8c08f91\">\n\n<div class=\"wpdt-c wdt-skin-light\">\n \n<input type=\"hidden\" id=\"wdtNonceFrontendEdit_254\" name=\"wdtNonceFrontendEdit_254\" value=\"0b0acbe87b\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/index.php\/wp-json\/wp\/v2\/pages\/2730\" \/> <input type=\"hidden\" id=\"table_1_desc\" value='{\"tableId\":\"table_1\",\"tableType\":\"manual\",\"selector\":\"#table_1\",\"responsive\":false,\"responsiveAction\":\"icon\",\"editable\":false,\"inlineEditing\":false,\"infoBlock\":false,\"pagination\":true,\"paginationAlign\":\"right\",\"paginationLayout\":\"full_numbers\",\"file_location\":\"\",\"tableSkin\":\"light\",\"globalSearch\":false,\"showRowsPerPage\":false,\"popoverTools\":false,\"hideBeforeLoad\":false,\"number_format\":2,\"decimalPlaces\":2,\"spinnerSrc\":\"https:\\\/\\\/www.szlaser.com\\\/wp-content\\\/plugins\\\/wpdatatables\\\/assets\\\/\\\/img\\\/spinner.gif\",\"groupingEnabled\":false,\"tableWpId\":\"254\",\"dataTableParams\":{\"sDom\":\"BT\\u003C\\u0027clear\\u0027\\u003Etp\",\"bSortCellsTop\":false,\"bFilter\":true,\"bPaginate\":true,\"sPaginationType\":\"full_numbers\",\"aLengthMenu\":[[1,5,10,25,50,100,-1],[1,5,10,25,50,100,\"All\"]],\"iDisplayLength\":25,\"columnDefs\":[{\"sType\":\"formatted-num\",\"wdtType\":\"int\",\"bVisible\":false,\"orderable\":true,\"searchable\":true,\"InputType\":\"text\",\"name\":\"wdt_ID\",\"origHeader\":\"wdt_ID\",\"notNull\":false,\"conditionalFormattingRules\":[],\"className\":\"numdata integer column-wdt_id\",\"aTargets\":[0]},{\"sType\":\"string\",\"wdtType\":\"string\",\"bVisible\":true,\"orderable\":true,\"searchable\":true,\"InputType\":\"text\",\"name\":\"attributes\",\"origHeader\":\"attributes\",\"notNull\":false,\"conditionalFormattingRules\":[],\"className\":\" column-attributes\",\"sWidth\":\"35%\",\"aTargets\":[1]},{\"sType\":\"string\",\"wdtType\":\"string\",\"bVisible\":true,\"orderable\":true,\"searchable\":true,\"InputType\":\"textarea\",\"name\":\"values\",\"origHeader\":\"values\",\"notNull\":false,\"conditionalFormattingRules\":[],\"className\":\" column-values\",\"aTargets\":[2]}],\"bAutoWidth\":false,\"order\":[[0,\"asc\"]],\"ordering\":false,\"oLanguage\":{\"sSearchPlaceholder\":\"\"},\"buttons\":[],\"bProcessing\":false,\"serverSide\":true,\"ajax\":{\"url\":\"https:\\\/\\\/www.szlaser.com\\\/wp-admin\\\/admin-ajax.php?action=get_wdtable&table_id=254\",\"type\":\"POST\"},\"oSearch\":{\"bSmart\":false,\"bRegex\":false,\"sSearch\":\"\"}},\"tabletWidth\":\"1024\",\"mobileWidth\":\"480\",\"advancedFilterEnabled\":false,\"serverSide\":true,\"autoRefreshInterval\":0,\"processing\":true,\"fnServerData\":true,\"columnsFixed\":0,\"sumFunctionsLabel\":\"\",\"avgFunctionsLabel\":\"\",\"minFunctionsLabel\":\"\",\"maxFunctionsLabel\":\"szlasers@gmail.com\",\"columnsDecimalPlaces\":{\"wdt_ID\":-1,\"attributes\":-1,\"values\":-1},\"columnsThousandsSeparator\":{\"wdt_ID\":0},\"sumColumns\":[],\"avgColumns\":[],\"sumAvgColumns\":[],\"timeFormat\":\"h:i A\",\"datepickFormat\":\"dd\\\/mm\\\/yy\"}'\/>\n\n <table id=\"table_1\"\n class=\" display nowrap data-t data-t wpDataTable wpDataTableID-254\"\n style=\"\"\n data-described-by='table_1_desc'\n data-wpdatatable_id=\"254\">\n \n <!-- Table header -->\n \n<thead>\n<tr>\n <th\n class=\" wdtheader sort numdata integer \"\n style=\"\">wdt_ID<\/th> <th\n data-class=\"expand\" class=\" wdtheader sort \"\n style=\"\">Attributes<\/th> <th\n class=\" wdtheader sort \"\n style=\"\">Value<\/th> <\/tr>\n<\/thead>\n <!-- \/Table header -->\n\n <!-- Table body -->\n \n<tbody>\n <tr id=\"table_254_row_0\">\n <td style=\"\">76<\/td>\n <td style=\"\">Material<\/td>\n <td style=\"\">N-BK7<\/td>\n <\/tr>\n <tr id=\"table_254_row_1\">\n <td style=\"\">95<\/td>\n <td style=\"\">Dimension Tolerance<\/td>\n <td style=\"\">\u00b10.15mm<\/td>\n <\/tr>\n <tr id=\"table_254_row_2\">\n <td style=\"\">96<\/td>\n <td style=\"\">Surface Quality<\/td>\n <td style=\"\">60\/40~40\/20<\/td>\n <\/tr>\n <tr id=\"table_254_row_3\">\n <td style=\"\">97<\/td>\n <td style=\"\">Angle Tolerance<\/td>\n <td style=\"\">\u00b130''~\u00b13'<\/td>\n <\/tr>\n <tr id=\"table_254_row_4\">\n <td style=\"\">98<\/td>\n <td style=\"\">Surface Flatness<\/td>\n <td style=\"\">N\uff1c3, \u25b3N\uff1c1<\/td>\n <\/tr>\n <tr id=\"table_254_row_5\">\n <td style=\"\">99<\/td>\n <td style=\"\">Clear Aperture<\/td>\n <td style=\"\">\uff1e80%<\/td>\n <\/tr>\n <tr id=\"table_254_row_6\">\n <td style=\"\">100<\/td>\n <td style=\"\">Chips<\/td>\n <td style=\"\">\uff1c0.2mm<\/td>\n <\/tr>\n <tr id=\"table_254_row_7\">\n <td style=\"\">101<\/td>\n <td style=\"\">Coating<\/td>\n <td style=\"\">Uncoated<br>Single Layer MgF\u2082<br>AR@450-650nm<\/td>\n <\/tr>\n <\/tbody> <!-- \/Table body -->\n\n <!-- Table footer -->\n \n <!-- \/Table footer -->\n\n <\/table>\n\n<\/div><style>\ntable.wpDataTable { table-layout: fixed !important; }\ntable.wpDataTable td, table.wpDataTable th { white-space: normal !important; }\ntable.wpDataTable td.numdata { text-align: right !important; }\n<\/style>\n<style>\n\n\/* table font color 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style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-tabs fusion-tabs-2 classic nav-is-justified horizontal-tabs icon-position-left mobile-mode-accordion\" style=\"--awb-title-border-radius-top-left:0px;--awb-title-border-radius-top-right:0px;--awb-title-border-radius-bottom-right:0px;--awb-title-border-radius-bottom-left:0px;--awb-inactive-color:#eaeaeb;--awb-background-color:#ffffff;--awb-border-color:#e2e2e2;--awb-active-border-color:#e4042d;\"><div class=\"nav\"><ul class=\"nav-tabs nav-justified\" role=\"tablist\"><li class=\"active\" role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-be46e61c04135e0668f\" aria-selected=\"true\" id=\"fusion-tab-porroprismusedinbinocularopticalinstrument\" href=\"#tab-be46e61c04135e0668f\"><h4 class=\"fusion-tab-heading\">Porro Prism used in Binocular optical instrument <\/h4><\/a><\/li><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-4b4661b956c17eb381f\" aria-selected=\"false\" tabindex=\"-1\" id=\"fusion-tab-whydobinocularshaveprisms?\" href=\"#tab-4b4661b956c17eb381f\"><h4 class=\"fusion-tab-heading\">Why do binoculars have prisms?<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-content\"><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs nav-justified\" role=\"tablist\"><li class=\"active\" role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-be46e61c04135e0668f\" aria-selected=\"true\" id=\"mobile-fusion-tab-porroprismusedinbinocularopticalinstrument\" href=\"#tab-be46e61c04135e0668f\"><h4 class=\"fusion-tab-heading\">Porro Prism used in Binocular optical instrument <\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix in active\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-porroprismusedinbinocularopticalinstrument\" id=\"tab-be46e61c04135e0668f\">\n<h5><strong>Binocular<\/strong>, optical instrument, usually handheld, for providing a magnified stereoscopic view of distant objects, consisting of two similar\u00a0<a class=\"md-crosslink\" href=\"https:\/\/www.britannica.com\/science\/optical-telescope\">telescope<\/a>s, one for each eye, mounted on a single frame. A single thumbwheel may control the focus of both telescopes simultaneously, and provision may be made for adjusting the focus of each separately to allow for varying characteristics in the two eyes. Binoculars are designed to give an upright view that is correctly oriented left-to-right. Because they allow use of both eyes in a natural way, they are more comfortable than single telescopes, provide depth perception, and improve visual\u00a0<a class=\"md-dictionary-link md-dictionary-tt-off\" href=\"https:\/\/www.merriam-webster.com\/dictionary\/acuity\" data-term=\"acuity\">acuity<\/a>\u00a0by giving the human visual system two sets of data to process and combine.<\/h5>\n<div class=\"assemblies\">\n<div class=\"md-assembly-wrapper\" data-type=\"image\">\n<div class=\"image-wrapper mg\"><img decoding=\"async\" class=\"lazyload \" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27444%27%20height%3D%27296%27%20viewBox%3D%270%200%20444%20296%27%3E%3Crect%20width%3D%27444%27%20height%3D%27296%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/cdn.britannica.com\/s:700x500\/08\/94108-050-1E724E04\/Spectators-binoculars-horse-race.jpg\" alt=\"binoculars; horse racing\" width=\"444\" height=\"296\" \/><\/div>\n<\/div>\n<h5>In most binoculars, each telescope is provided with two reflecting\u00a0<span id=\"ref104295\"><\/span><a class=\"md-crosslink\" href=\"https:\/\/www.britannica.com\/technology\/prism-optics\">prism<\/a>s. The prisms reinvert, or erect, the inverted image supplied by the objective of each telescope. They prescribe a folded path for the light rays, allowing a shorter overall length for the instrument. When the prisms used are of the Porro type (<em>see<\/em>\u00a0<a class=\"md-crosslink\" href=\"https:\/\/www.britannica.com\/science\/optics#ref37966\">optics: Reflecting prisms<\/a>), they also provide better depth perception at greater distances by allowing the two objectives to be set farther apart than the eyepieces. The arrangement of these prisms and the other optical components is shown in the\u00a0<span class=\"md-link media-overlay-link asmref\" data-href=\"\/media\/1\/65717\/4525\">illustration<\/span>.<\/h5>\n<div><img decoding=\"async\" class=\"lazyload \" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27456%27%20height%3D%27433%27%20viewBox%3D%270%200%20456%20433%27%3E%3Crect%20width%3D%27456%27%20height%3D%27433%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/cdn.britannica.com\/s:700x500\/05\/6505-050-9EEC1654\/binocular-portion-instrument-path-light.jpg\" alt=\"Prismatic binocular, with a cutaway portion showing the folded path taken by light traveling through the instrument.\" width=\"456\" height=\"433\" \/><\/div>\n<div>\n<h5>A binocular\u2019s primary optical characteristics are commonly described by two numbers, the first of which is followed by a multiplication sign\u2014for instance, 7\u00d750. The first number indicates the\u00a0<a class=\"md-crosslink autoxref\" href=\"https:\/\/www.britannica.com\/technology\/magnification\">magnification<\/a>\u00a0(e.g., 7\u00d7, meaning \u201c7 times\u201d) and the second the diameter of the objective in millimetres (1 inch is about 25 millimetres). This latter figure is a measure of the light-gathering power of the instrument. For a given magnification, larger objectives produce a brighter image in dim light but also create a more massive binocular. Handheld binoculars designed for typical uses such as hunting, sports watching, nature study, or amateur astronomy range from about 6\u00d730 to 10\u00d750. Instruments having greater magnifications and light-gathering power are too heavy to hold steady, especially for long periods, but they can be fixed to a tripod or other mount.<\/h5>\n<h5>In applications in which depth perception is not important, a single telescope, called a\u00a0<span id=\"ref104296\"><\/span>monocular, may be employed. It is essentially one-half of a binocular and usually incorporates prisms in the light path.<\/h5>\n<\/div>\n<\/div>\n<h5><i class=\"fb-icon-element-1 fb-icon-element fontawesome-icon fa-external-link-alt fas circle-yes fusion-text-flow\" style=\"--awb-circlebordersize:1px;--awb-font-size:17.6px;--awb-width:35.2px;--awb-height:35.2px;--awb-line-height:33.2px;--awb-margin-right:10px;\"><\/i> Click to view more<\/h5>\n<\/div><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs nav-justified\" role=\"tablist\"><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-4b4661b956c17eb381f\" aria-selected=\"false\" tabindex=\"-1\" id=\"mobile-fusion-tab-whydobinocularshaveprisms?\" href=\"#tab-4b4661b956c17eb381f\"><h4 class=\"fusion-tab-heading\">Why do binoculars have prisms?<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-whydobinocularshaveprisms?\" id=\"tab-4b4661b956c17eb381f\">\n<h5>In binoculars prisms are used to make the correction. The prisms also serve to reduce the size of the binoculars. This is a result of their path bending qualities, as the light’s path curls through the prisms, the length of the instrument is reduced making it easier to handle.<\/h5>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-4 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":471,"menu_order":11,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-2730","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.7 (Yoast SEO v25.8) - 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![](\"https:\/\/www.szlaser.com\/wp-content\/uploads\/2020\/08\/porro-prism_800x800-1-1.jpg\" "\\"porro")
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<\/a><\/span><\/div><\/div><\/div><\/div>