{"id":113811,"date":"2026-10-09T16:57:25","date_gmt":"2026-10-09T14:57:25","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=113811"},"modified":"2026-10-13T09:43:15","modified_gmt":"2026-10-13T07:43:15","slug":"filter-adapter-for-sky-quality-meter-sqm-l-sqm-le-and-sqm-lu-unihedron","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/filteradapter-voor-sky-quality-meter-sqm-l-sqm-le-en-sqm-lu-unihedron\/","title":{"rendered":"Filter adapter for Sky Quality Meter SQM-L, SQM-LE and SQM-LU | Unihedron"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A simple measurement with your Sky Quality Meter tells you how dark the sky is, but not where the light is coming from. With this SQM-L filter adapter, you attach a filter to the lens, so you can also measure through a filter and see how much of the sky background comes from a particular color or type of lighting.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The adapter is intended for the Sky Quality Meters with lens: <a href=\"https:\/\/www.telescoop.nl\/en\/unihedron-sky-quality-meter-sqm-l-with-lens\/\">the SQM-L with lens<\/a>, <a href=\"https:\/\/www.telescoop.nl\/en\/unihedron-sky-quality-meter-sqm-with-lens-and-ethernet-for-fixed-installation\/\">the SQM-LE with Ethernet<\/a> and the SQM-LU.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check beforehand which model you have, because for the SQM-LU-DL there is a separate adapter. Always compare measurements with and without the filter in the same place, under the same conditions and shortly after each other; otherwise the difference will be insignificant. You can see which types of filters are suitable for artificial light by looking at <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/light-pollution-filters\/\">filters against light pollution<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Adapter for a filter for the lens of the SQM-L, SQM-LE or SQM-LU, to measure the sky brightness even with a filter.<\/p>","protected":false},"featured_media":113810,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[3298],"product_cat":[56],"product_tag":[],"class_list":["post-113811","product","type-product","status-publish","has-post-thumbnail","product_brand-unihedron","product_cat-telescoop-accessoires","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":113806,"url":"https:\/\/www.telescoop.nl\/en\/filteradapter-125-inch-voor-sky-quality-meter-sqm-lu-dl-unihedron\/","url_meta":{"origin":113811,"position":0},"title":"1.25 inch filter adapter for Sky Quality Meter SQM-LU-DL | Unihedron","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Adapter to attach a 1.25 inch filter to the lens of the SQM-LU-DL, for measurements in a part of the spectrum.","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\/10\/48208_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/48208_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/48208_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113795,"url":"https:\/\/www.telescoop.nl\/en\/unihedron-sky-quality-meter-sqm-lu-met-lens-en-usb-voor-je-computer\/","url_meta":{"origin":113811,"position":1},"title":"Unihedron Sky Quality Meter SQM-LU with lens and USB for your computer","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Sky Quality Meter with a lens that you attach to your laptop via USB, so you can capture the darkness of the sky for an entire night.","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\/10\/48172_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/48172_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/48172_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113789,"url":"https:\/\/www.telescoop.nl\/en\/unihedron-sky-quality-meter-sqm-l-met-lens\/","url_meta":{"origin":113811,"position":2},"title":"Unihedron Sky Quality Meter SQM-L with lens","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Version of the Sky Quality Meter with a lens, which measures a smaller area of sky and therefore suffers less from lights or trees nearby.","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\/10\/20964_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/20964_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/20964_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113800,"url":"https:\/\/www.telescoop.nl\/en\/unihedron-sky-quality-meter-sqm-lu-dl-met-lens-usb-en-datalogger\/","url_meta":{"origin":113811,"position":3},"title":"Unihedron Sky Quality Meter SQM-LU-DL with lens, USB and data logger","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Sky Quality Meter that measures itself at fixed times and stores the values, for long measurement series without a laptop next to it.","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\/10\/48182_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/48182_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/48182_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113816,"url":"https:\/\/www.telescoop.nl\/en\/batterijhouder-voor-sky-quality-meter-sqm-lu-dl-unihedron\/","url_meta":{"origin":113811,"position":4},"title":"Battery holder for Sky Quality Meter SQM-LU-DL | Unihedron","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Battery holder for the SQM-LU-DL, so the meter can measure all night in a dark place without a power outlet or laptop.","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\/10\/80322_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/80322_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/80322_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113791,"url":"https:\/\/www.telescoop.nl\/en\/unihedron-sky-quality-meter-sqm-le-met-lens-en-ethernet-voor-vaste-opstelling\/","url_meta":{"origin":113811,"position":5},"title":"Unihedron Sky Quality Meter SQM-LE with lens and Ethernet for fixed installation","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Sky Quality Meter with lens and network connection for a fixed measuring location, which allows you to measure and read the results all night via your computer.","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\/10\/20965_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/20965_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/20965_1.jpg?resize=525%2C300&ssl=1 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