{"id":108803,"date":"2026-06-23T16:49:20","date_gmt":"2026-06-23T14:49:20","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=108803"},"modified":"2026-06-23T16:55:56","modified_gmt":"2026-06-23T14:55:56","slug":"baader-astrosolar-astf-zonnefilter-280mm","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/baader-astrosolar-astf-zonnefilter-280mm\/","title":{"rendered":"Baader AstroSolar ASTF Zonnefilter \u2013 280 mm"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Wil je de Zon veilig, scherp en in het hoogste contrast observeren of fotograferen met een grote telescoop? De Baader ASTF (AstroSolar Telescope Filter) serie biedt de absolute topklasse in zonobservatie. Dit hoogwaardige zonnefilter is speciaal ontworpen om de volledige optische prestaties van grotere instrumenten te benutten, zonder concessies te doen aan de veiligheid.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Geschikt voor telescopen met een lensopening van 270 tot 290 mm<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">De keuze van het juiste zonnefilter hangt altijd af van de optische opening van je telescoop. Dit specifieke filter heeft een <strong>vrije doorgang van 280 mm<\/strong> en is optimaal ontworpen voor telescopen met een <strong>lensopening of spiegeldiameter van 270 mm tot 290 mm<\/strong> (zoals grotere 11-inch Schmidt-Cassegrain telescopen).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dankzij het uiterst flexibele montagesysteem met verschuifbare centreerpennen past de vatting op een brede range aan buisdiameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Klembereik buitenzijde buis:<\/strong> 300 mm tot 340 mm<\/li>\n\n\n\n<li><strong>Klembereik binnenzijde buis\/dauwkap:<\/strong> 330 mm tot 370 mm<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Waarom de Baader ASTF-serie de standaard is<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Spanningsvrije montage (ASTF-cell):<\/strong> In tegenstelling tot goedkopere filters, beschikt de ASTF-serie over een temperatuur-gecompenseerd frame. Dit voorkomt dat temperatuurverschillen in de felle zon spanning veroorzaken op de folie. Het resultaat? Geen optische vervorming (astigmatisme) en een constant loepzuiver beeld, zelfs bij zeer hoge vergrotingen.<\/li>\n\n\n\n<li><strong>AstroSolar\u00ae Safety Film (OD 5.0):<\/strong> Dit filter maakt gebruik van de wereldwijd geprezen Baader AstroSolar folie. Deze filtert 99,999% van het schadelijke zonlicht en levert een natuurgetrouw, contrastrijk wit-licht beeld. Ideaal om de fijnste details van zonnevlekken, zonnevlammen en de korrelstructuur (granulatie) van het zonoppervlak te bestuderen.<\/li>\n\n\n\n<li><strong>Maximale drievoudige veiligheid:<\/strong> Naast de stevige, met rubber beklede centreerpennen die de telescoopbuis stevig vastgrijpen, worden er standaard drie robuuste veiligheidsriemen met klittenband meegeleverd. Hiermee zekere je het filter direct aan de buis, zodat onverwachte windstoten of per ongeluk stoten geen enkel risico vormen.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Wat je kunt waarnemen en fotograferen:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>De indrukwekkende structuren en schaduwen van zonnevlekken (umbra en penumbra).<\/li>\n\n\n\n<li>Het actieve, korrelige oppervlak van de fotosfeer (granulatie).<\/li>\n\n\n\n<li>Haarscherpe zonnefotografie met een DSLR, CMOS-camera of smartphone-adapter dankzij de perfect vlakke folie.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Series:<\/strong> ASTF (AstroSolar Telescope Filter)<\/li>\n\n\n\n<li><strong>Vrije optische opening:<\/strong> 280 mm<\/li>\n\n\n\n<li><strong>Geschikt voor telescoop-opening:<\/strong> 270 mm \u2013 290 mm<\/li>\n\n\n\n<li><strong>Totale buitendiameter filtervatting:<\/strong> 370 mm<\/li>\n\n\n\n<li><strong>Weight:<\/strong> 253 gram<\/li>\n\n\n\n<li><strong>Type:<\/strong> Wit-licht zonnefilter (visueel en fotografisch)<\/li>\n\n\n\n<li><strong>Includes:<\/strong> 2 sets centreerpennen (10 mm en 20 mm dikte), 3 klittenband veiligheidsriemen, rubberen afdekpluggen en montagehandleiding.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Veiligheidstip: Controleer voor elk gebruik de folie op eventuele beschadigingen en zorg dat de zoekertelescoop van de telescoop is afgedekt of verwijderd tijdens zonobservatie.<\/em><\/p>","protected":false},"excerpt":{"rendered":"<h3 data-path-to-node=\"4\">\u00a0<\/h3>\n<p data-path-to-node=\"2\">Observeer en fotografeer de Zon in het hoogste contrast met het Baader ASTF 280 mm zonnefilter. Dit professionele wit-licht filter maakt gebruik van de geprezen AstroSolar\u00ae Safety Film (OD 5.0) en is optimaal geschikt voor telescopen met een lensopening van 270 tot 290 mm. Dankzij het temperatuur-gecompenseerde frame en de drievoudige klittenbandbeveiliging geniet je van een loepzuiver beeld en maximale veiligheid tijdens het bestuderen van zonnevlekken en granulatie.<\/p>","protected":false},"featured_media":108806,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[541],"product_cat":[3178],"product_tag":[],"class_list":["post-108803","product","type-product","status-publish","has-post-thumbnail","product_brand-baader","product_cat-zonnefilters","product_shipping_class-licht","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":104875,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-labzz-t3\/","url_meta":{"origin":108803,"position":0},"title":"Levenhuk LabZZ T3 - 60\/700 Refractor","author":"Abdullah Ibrar","date":"24-03-2026","format":false,"excerpt":"Levenhuk LabZZ T3 - 60\/700 Refractor comes with 4mm eyepiece, 12.5mm eyepiece, 1.5x eyepiece, 3x Barlow lens, 5x optical viewfinder, zenith mirror and aluminum tripod with accessory tray.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Levenhuk LabZZ T3 - 60\/700 Refractor aluminium statief met accessoirebak","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/03\/Levenhuk-LabZZ-T3-60700-Refractor-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":106246,"url":"https:\/\/www.telescoop.nl\/en\/levenhuk-discovery-spark-767-az\/","url_meta":{"origin":108803,"position":1},"title":"Levenhuk Discovery Spark 767 AZ \u2013 76\/700 Newtonian Reflector","author":"Abdullah Ibrar","date":"05-04-2026","format":false,"excerpt":"The Levenhuk Discovery Spark 767 AZ \u2013 76\/700 Newtonian reflector comes with SR4mm, H12.5mm, and H20mm eyepieces, a 2x Barlow lens, an optical finder, an aluminum tripod with an accessory tray, and the colorful knowledge book \u201cSpace. 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