{"id":90562,"date":"2025-11-30T12:50:04","date_gmt":"2025-11-30T11:50:04","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=90562"},"modified":"2026-09-22T10:44:13","modified_gmt":"2026-09-22T08:44:13","slug":"sky-watcher-21-5cm-extension-tube-3-8","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/sky-watcher-21-5cm-extension-tube-3-8\/","title":{"rendered":"Sky-Watcher 21.5 cm Extension Tube \u2013 3\/8 inch Connection"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Sky-Watcher 21.5 cm half-pier: unobstructed view of the zenith<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Place this aluminum half-column between your tripod and mount head. The extra 21.5 cm raises the head above the tripod legs, allowing you to observe objects directly overhead without the tube or camera touching a leg. This makes observing much more comfortable, especially with refractors and trackers.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-AZ-5-Zuilverlenging-Statief-verlengbuis-voor-Deluxe.jpg\" alt=\"Skywatcher AZ-5 column extension aluminum tripod extension tube with black column and white ends on white background.\" title=\"\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The pillar has a 3\/8-inch connection on both sides (male and female) and therefore fits between any tripod and any head with a photo thread, such as the AZ-5, AZ-GTi, and Star Adventurer series. The aluminum keeps the weight low without sacrificing rigidity.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>21.5 cm extra height, \u00d870 mm<\/li>\n\n\n<li>3\/8 inch male and female connection<\/li>\n\n\n<li>Light and rigid aluminum<\/li>\n\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suitable for any combination of tripod and head with a 3\/8 inch connection, including the Sky-Watcher AZ-5, AZ-GTi, and Star Adventurer family.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Type<\/strong><\/td><td>Half pedestal<\/td><\/tr><tr><td><strong>Height<\/strong><\/td><td>215 mm<\/td><\/tr><tr><td><strong>Diameter<\/strong><\/td><td>70 mm<\/td><\/tr><tr><td><strong>Material<\/strong><\/td><td>Aluminum<\/td><\/tr><tr><td><strong>Connection<\/strong><\/td><td>3\/8 inch male and female<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The disassembly of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/sky-watcher\/\">Sky-Watcher<\/a> is a base that will last you for years. Unsure which mount is best for your telescope and your goals? Contact us, we'd be happy to help you decide.<\/p>","protected":false},"excerpt":{"rendered":"<p>21.5 cm aluminum half pier with a 3\/8-inch connection on both sides. Lifts your head above the tripod legs, allowing you to observe straight overhead without the tube colliding.<\/p>","protected":false},"featured_media":98046,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[542],"product_cat":[56,499],"product_tag":[],"class_list":["post-90562","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-telescoop-accessoires","product_cat-adapters","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":94383,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-kolossus-montering-bundel-halfzuil-aluminium-driepootstatief\/","url_meta":{"origin":90562,"position":0},"title":"Omegon Pro Colossus Mount Bundle with Half Column and Aluminum Tripod Stand","author":"Info telescoop","date":"14-01-2026","format":false,"excerpt":"Omegon Pro Kolossus bundle: parallelogram mounting with half-arch and stainless steel tripod. Complete balanced setup for binoculars up to 5 kg.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Pro-Kolossus-montering-bundel-met-halfzuil-en-statief-5.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":33120,"url":"https:\/\/www.telescoop.nl\/en\/ioptron-skyhunter-pier-extension\/","url_meta":{"origin":90562,"position":1},"title":"iOptron SkyHunter Pier-Extension","author":"","date":"08-11-2025","format":false,"excerpt":"190 mm aluminum half-post with 3\/8 inch threaded screw for the iOptron SkyHunter. Extra working height and free space around the zenith.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":91527,"url":"https:\/\/www.telescoop.nl\/en\/skywatcher-eq6-extension-tube-refractor\/","url_meta":{"origin":90562,"position":2},"title":"Sky-Watcher Extension tube for EQ6 series","author":"","date":"21-12-2025","format":false,"excerpt":"Extension pier that places the EQ6 head about 20 cm (8 inches) higher: more comfortable viewing through long refractors and more clearance above the tripod legs.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":94363,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-kolossus-montering\/","url_meta":{"origin":90562,"position":3},"title":"Omegon Pro Colossus Mount","author":"Info telescoop","date":"14-01-2026","format":false,"excerpt":"Omegon Pro Kolossus parallelogram mount for binoculars up to 5 kg: balanced swing arm with two 3.7 kg counterweights, 360-degree rotatable. Without tripod.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Pro-Kolossus-montering-17.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":90495,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-az5-deluxe-mount-tripod\/","url_meta":{"origin":90562,"position":4},"title":"Sky-Watcher AZ5 Deluxe Alt-Azimutal Mount with Aluminum Tripod","author":"Info telescoop","date":"30-11-2025","format":false,"excerpt":"User-friendly altazimuth mount for telescopes up to 5 kg, with worm gear slow-motion control on both axes, slip clutch, and aluminum tripod. Also suitable for daytime nature observation.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-AZ5-Montering-Deluxe-met-statief-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":90475,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-16-inch-extension-tube-eq5-heq5\/","url_meta":{"origin":90562,"position":5},"title":"Sky-Watcher 16 inch (40.6 cm) Extension Pier for EQ5 &amp; HEQ5","author":"","date":"30-11-2025","format":false,"excerpt":"Steel extension pillar of approximately 40 cm that fits between the tripod and the EQ5 or HEQ5 mount head. Provides long telescopes with clearance above the tripod legs and gives you a comfortable, upright viewing position.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/90562","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=90562"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/98046"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=90562"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=90562"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=90562"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=90562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}