Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the schema-and-structured-data-for-wp domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/html/wp-includes/functions.php on line 6114 Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the wordpress-seo domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/html/wp-includes/functions.php on line 6114 Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/wp-includes/functions.php:6114) in /var/www/html/wp-includes/rest-api/class-wp-rest-server.php on line 1893 1.0All Opticahttps://alloptica.comMichael Oliver Barlowhttps://alloptica.com/author/michael-oliver-barlow/How to Use a Refractor Telescope: Guide on Buying Your First Scoperich600338<blockquote class="wp-embedded-content" data-secret="QVbrk5UWCP"><a href="https://alloptica.com/how-to-use-a-refractor-telescope/">How to Use a Refractor Telescope: Comprehensive Guide</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://alloptica.com/how-to-use-a-refractor-telescope/embed/#?secret=QVbrk5UWCP" width="600" height="338" title="“How to Use a Refractor Telescope: Comprehensive Guide” — All Optica" data-secret="QVbrk5UWCP" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> https://alloptica.com/wp-content/uploads/2022/06/vintage-refractor-telescope.jpg890465How to use a refractor telescope: tips for seasoned astronomers and hobbyists alike. A detailed guide on picking, collimating, and using an optical scope.