{"id":29000,"date":"2025-09-20T19:53:48","date_gmt":"2025-09-20T17:53:48","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=29000"},"modified":"2026-03-13T11:47:36","modified_gmt":"2026-03-13T10:47:36","slug":"optolong-l-para-filter-2-inch","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/optolong-l-para-filter-2-inch\/","title":{"rendered":"Optolong L-Para Filter 2 inch"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Optolong Filters L-Para 2\u2033 is a specialized correction filter developed for use with fast telescopes and astrographs. For telescopes with low f-values (f\/2-f\/3), the pass curves of many filters shift, which can cause color aberrations and blur. The L-Para filter corrects these shifts and restores the optimal transmission of narrowband and wideband filters, so your astrophotos maintain proper color and sharpness.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The filter is mainly used in combination with other Optolong filters such as the L-eXtreme, L-eNhance or L-Ultimate. By placing it before these filters, the L-Para ensures that the transmission peaks are again exactly at the desired wavelengths (e.g., H-alpha and OIII). This provides a significantly higher signal-to-noise ratio and prevents the loss of valuable signal in high-speed optical systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Made of high-quality optical glass and equipped with a multiple anti-reflection coating, the L-Para guarantees maximum light transmission without unwanted reflections. The robust 2\u2033 aluminum mount makes the filter suitable for virtually all filter wheels and 2\u2033 accessories.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application<\/strong><br>This filter is ideal for astrophotographers working with fast systems such as RASA, HyperStar or other f\/2-f\/3 telescopes. The L-Para filter allows narrowband and wideband filters to function correctly and prevents emission lines from shifting. For visual observation, this filter is not intended; it is specifically designed for professional and advanced astrophotography.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specifications<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Type: Correction filter (para-band)<\/li>\n\n\n\n<li>Diameter: 2\u2033 mount<\/li>\n\n\n\n<li>Material: Optical glass with multiple coating<\/li>\n\n\n\n<li>Mount: Aluminum<\/li>\n\n\n\n<li>Application:\n<ul class=\"wp-block-list\">\n<li>\u2713 Correction of filter shift in f\/2-f\/3 systems<\/li>\n\n\n\n<li>\u2713 Compatible with narrowband and broadband filters<\/li>\n\n\n\n<li>\u2713 Astrophotography with RASA, HyperStar and fast Newtons<\/li>\n\n\n\n<li>\u2717 Not intended for visual use<\/li>\n<\/ul>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<article class=\"w-full text-token-text-primary focus-visible:outline-2 focus-visible:outline-offset-[-4px]\" dir=\"auto\" data-testid=\"conversation-turn-35\" data-scroll-anchor=\"true\">\n<div class=\"text-base my-auto mx-auto py-[18px] px-6\">\n<div class=\"mx-auto flex flex-1 text-base gap-4 md:gap-5 lg:gap-6 md:max-w-3xl lg:max-w-[40rem] xl:max-w-[48rem]\">\n<div class=\"group\/conversation-turn relative flex w-full min-w-0 flex-col agent-turn @xs\/thread:px-0 @sm\/thread:px-1.5 @md\/thread:px-4\">\n<div class=\"flex-col gap-1 md:gap-3\">\n<div class=\"flex max-w-full flex-col flex-grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 whitespace-normal break-words text-start [.text-message+&amp;]:mt-5\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"28a009d2-3136-4224-8ee5-30c9a1a2ece5\" data-message-model-slug=\"gpt-4o\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[3px]\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<p data-start=\"362\" data-end=\"856\">\u00a0<\/p>\n<p data-start=\"134\" data-end=\"360\">Optolong Filters L-Para 2&#8243; wordt geleverd met aluminium vatting en meervoudige coating \u2013 correctiefilter dat kleurafwijkingen in snelle telescopen (f\/2\u2013f\/3) compenseert voor optimale astrofotografie.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"featured_media":29018,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1548],"product_cat":[56,587,588,3139],"product_tag":[],"class_list":["post-29000","product","type-product","status-publish","has-post-thumbnail","product_brand-optolong","product_cat-telescoop-accessoires","product_cat-camera-accessoires","product_cat-filters","product_cat-lichtvervuilingsfilters-light-pollution","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":29024,"url":"https:\/\/staging.telescoop.nl\/en\/optolong-l-ultimate-filter-3nm-2-inch\/","url_meta":{"origin":29000,"position":0},"title":"Optolong L-Ultimate Filter 3nm 2 inch","author":"","date":"20-09-2025","format":false,"excerpt":"\u00a0 Optolong Filters L-Ultimate 2\" comes with an aluminum mount - high-end filter for maximum contrast in nebula astrophotography, even with heavy light pollution.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters L-Ultimate 2\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-2-.jpg?resize=700%2C400&ssl=1 2x, 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1,25''","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-1-25-.jpg?resize=1400%2C800&ssl=1 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