{"id":28985,"date":"2025-09-20T19:51:10","date_gmt":"2025-09-20T17:51:10","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=28985"},"modified":"2026-03-13T11:48:19","modified_gmt":"2026-03-13T10:48:19","slug":"optolong-l-extreme-filter-2-inch","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/optolong-l-extreme-filter-2-inch\/","title":{"rendered":"Optolong L-eXtreme Filter 2 inch"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Optolong Filters L-eXtreme 2\u2033 is an advanced narrowband filter designed specifically for astrophotography of emission nebulae with color cameras (OSC) and DSLRs. The filter allows only the emission lines H-alpha (656 nm) and OIII (500 nm) to pass through and blocks virtually all other light. This ensures extremely high contrasts and a darkened sky background, even in urban environments with strong light pollution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The dual transmission makes this filter particularly suitable for cameras with a Bayer pattern, as both the red and green\/blue channels are optimally utilized. As a result, nebulae such as the Veil Nebula, Orion Nebula and North American Nebula are captured with stunning clarity and detail. Compared to wider filters such as the L-eNhance, the L-eXtreme offers even more selectivity, which is ideal for astrophotography under difficult conditions, such as during moonlight nights.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The filter is made of high-quality optical glass with multiple anti-reflection coating and mounted in a robust 2\u2033 aluminum mount. This larger size makes it compatible with widescreen astrophotography and telescopes with 2\u2033 accessories, giving more flexibility when using wide-angle eyepieces and camera adapters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application<\/strong><br>This filter is ideal for astrophotographers who want to photograph emission nebulae with an OSC camera or DSLR, even from light-polluted areas. It supports long exposure times and stacking techniques, delivering results normally possible only under dark sky conditions. For visual use, the bandwidth is too narrow and therefore less suitable.<\/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: Narrow-band filter (dual-band)<\/li>\n\n\n\n<li>Diameter: 2\u2033 mount<\/li>\n\n\n\n<li>Transmittance: H-alpha (656 nm) and OIII (500 nm)<\/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 Astrophotography of emission nebulae<\/li>\n\n\n\n<li>\u2713 Suitable for OSC cameras and DSLRs<\/li>\n\n\n\n<li>\u2713 Works under heavy light pollution and moonlight<\/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=\"352\" data-end=\"802\">\u00a0<\/p>\n<p data-start=\"149\" data-end=\"350\">Optolong Filters L-eXtreme 2&#8243; wordt geleverd met aluminium vatting \u2013 hoogwaardig nevel\u00adfilter voor astrofotografie vanuit lichtvervuilde gebieden.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"featured_media":28996,"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-28985","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":28970,"url":"https:\/\/staging.telescoop.nl\/en\/optolong-l-extreme-filter-1-25-inch\/","url_meta":{"origin":28985,"position":0},"title":"Optolong L-eXtreme Filter 1.25 inch","author":"","date":"20-09-2025","format":false,"excerpt":"\u00a0 Optolong L-eXtreme 1.25\" Filter with Aluminum Mount - powerful filter for nebula astrophotography from light-polluted areas.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters L-eXtreme 1,25\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-eXtreme-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-eXtreme-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-eXtreme-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-eXtreme-1-25-.jpg?resize=700%2C400&ssl=1 2x, 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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, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Ultimate-2-.jpg?resize=1400%2C800&ssl=1 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optimale astrofotografie.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Optolong Filters L-Para 2\"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Para-2-1.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-Para-2-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Para-2-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Para-2-1.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Para-2-1.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Optolong-Filters-L-Para-2-1.jpg?resize=1400%2C800&ssl=1 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