{"id":107757,"date":"2026-04-29T17:34:19","date_gmt":"2026-04-29T15:34:19","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=107757"},"modified":"2026-08-23T15:07:44","modified_gmt":"2026-08-23T13:07:44","slug":"televue-powermate-4x-2-barlow-lens","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/televue-powermate-4x-2-barlowlens\/","title":{"rendered":"TeleVue Powermate 4x 2\u2033 Barlow Lens"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>TeleVue Powermate 4x 2\u2033: Barlow lens: telecentric amplifier from TeleVue<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Powermate 4x in a 2-inch version is built for photographic trains that require a high, stable factor: planetary work with larger cameras, solar photography behind an H-alpha filter, or spectroscopy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 2-inch housing keeps the image circle wide, ensuring that the corners remain illuminated even with a larger sensor.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Barlow-lens-4x-Powermate-2-.jpg\" alt=\"TeleVue Powermate 4x 2\" : title=\"\"><\/figure><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Telecentric instead of Barlow<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A Powermate is not a Barlow. Behind the negative front group is a second, positive group that makes the light beam parallel again. The result: the magnification factor remains practically constant, regardless of what is behind it and at what distance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A classic Barlow lens changes its magnification as the distance to the sensor or eyepiece increases and shifts the eyepiece's exit pupil. The Powermate does neither of these, making it suitable for long optical trains and for photography.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">For planet photography<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">For moon and planet imaging with a video camera, the image scale determines the detail. The Powermate brings the f-ratio to the level that matches the camera's pixel size, with a predictable, fixed factor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With the matching T-ring adapter, you screw a camera directly onto the Powermate, without loose adapters in the train.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Featured accessories<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For photography, the PMT-4201 T-ring adapter is included, allowing a camera with a T2 mount to screw directly onto the Powermate. Visually, the Powermate pairs well with any eyepiece from the merk series.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">For whom yes and for whom no<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u2713 Solar and planetary photography with larger cameras<\/li><li>\u2713 As who needs 4x without factor progression<\/li><li>\u2713 Demanding optical trains<\/li><li>\u2717 Visual all-round use<\/li><li>\u2717 Small, slow telescopes<\/li><\/ul>\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>Magnification factor<\/strong><\/td><td>4x<\/td><\/tr><tr><td><strong>Type<\/strong><\/td><td>Telecentric, 4 elements<\/td><\/tr><tr><td><strong>Stitch gauge<\/strong><\/td><td>2 inches<\/td><\/tr><tr><td><strong>Coating<\/strong><\/td><td>Fully multi-coated<\/td><\/tr><tr><td><strong>T-ring adapter<\/strong><\/td><td>PMT-4201 (sold separately)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">More eyepieces and Barlows are on the <a href=\"\/en\/telescope-accessories\/eyepieces-and-barlows\/\">Accessory page for eyepieces and Barlows<\/a>. You can find the complete selection of this merk on the <a href=\"\/en\/brands\/televue\/\">TeleVue merk Page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Powermate 4x of 2 inches for photographic trains with a high, constant factor.<\/p>","protected":false},"featured_media":107758,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1551],"product_cat":[56,3134,3129],"product_tag":[],"class_list":["post-107757","product","type-product","status-publish","has-post-thumbnail","product_brand-televue","product_cat-telescoop-accessoires","product_cat-barlow-lenzen-en-focal-extenders","product_cat-oculairs-en-barlows","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":[107111],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":111636,"url":"https:\/\/www.telescoop.nl\/en\/zwo-seestar-s50-pro\/","url_meta":{"origin":107757,"position":0},"title":"ZWO Seestar S50 Pro","author":"Info telescoop","date":"25-08-2026","format":false,"excerpt":"De ZWO Seestar S50 Pro is de opvolger van de Seestar S50: 50 mm quadruplet APO (260 mm, f\/5.2), twee 4K-sensoren van 8,3 MP, een groothoekcamera van 63 graden voor de Melkweg tot 8K, drie ingebouwde filters, 10.000 mAh accu (tot 9 uur) en 128 GB opslag. Vier opnamemodi voor\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"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\/107757","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=107757"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/107758"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=107757"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=107757"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=107757"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=107757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}