{"id":113249,"date":"2026-10-09T16:54:30","date_gmt":"2026-10-09T14:54:30","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=113249"},"modified":"2026-10-09T20:35:36","modified_gmt":"2026-10-09T18:35:36","slug":"quadrant-of-gunter-replica-hemisphere","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/kwadrant-van-gunter-replica-hemisferium\/","title":{"rendered":"Gunter's quadrant, replica | Hemisferium"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Calculating at sea or in the field used to take a lot of time, and that is why the English mathematician Edmund Gunter described a handy tool in the 17th century. After measuring the height of the sun or a star, you can read the Gunter quadrant without any calculations, among other things, the time, the time of sunrise, and the direction of the sun. It was a practical tool for sailors, surveyors, and astronomers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hemisferium makes replicas of historical scientific instruments. This quadrant is primarily a decorative and educational object, and a gift for anyone who is interested in astronomy, mathematics, or old instruments. Those who want to compare quadrants also look at <a href=\"https:\/\/www.telescoop.nl\/en\/beringer-quadrant-replica-hemisphere\/\">the quadrant of Beringer<\/a>. Later came to sea <a href=\"https:\/\/www.telescoop.nl\/en\/sextant-replica-of-the-navigation-instrument-hemisferium\/\">the sextant as a replica<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Never look through the visor when looking at the sun; let the light fall through the front visor onto the back. If the receiver also wants to view the sky through a telescope, then the visor can be tilted to the left or right to allow the light to fall onto the front visor. <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-selection-aid\/\">our choice guide for a telescope<\/a> in the first choice.<\/p>","protected":false},"excerpt":{"rendered":"<p>A replica of Edmund Gunter's 17th-century quadrant, which allows you to read off the time, among other things, after measuring altitude without any calculations.<\/p>","protected":false},"featured_media":113247,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[3286],"product_cat":[3272],"product_tag":[],"class_list":["post-113249","product","type-product","status-publish","has-post-thumbnail","product_brand-hemisferium","product_cat-geschenken","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":113249,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"The ZWO Seestar S50 Pro is the successor to the Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), two 8.3 MP 4K sensors, a 63-degree wide-angle camera for the Milky Way up to 8K, three built-in filters, a 10,000 mAh battery (up to 9 hours), and 128 GB of storage. Four capture modes for...","rel":"","context":"With 5 comments","block_context":{"text":"With 5 comments","link":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/#comments"},"img":{"alt_text":"ZWO Seestar S50 Pro hero","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/08\/zwo-seestar-s50-pro.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/113249","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=113249"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/113247"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=113249"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=113249"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=113249"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=113249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}