{"id":24864,"date":"2025-08-03T14:48:01","date_gmt":"2025-08-03T12:48:01","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=24864"},"modified":"2026-10-13T10:56:30","modified_gmt":"2026-10-13T08:56:30","slug":"orange-color-filter-2-inch-omegon-21","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/oranje-kleurfilter-2-inch-omegon-21\/","title":{"rendered":"Omegon Orange Color Filter #21 2-inch"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Omegon orange color filter #21 2 inch: sharper boundaries on Mars<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This orange color filter reveals subtle details that are difficult to see without a filter. It blocks blue and green wavelengths, greatly increasing contrast on planets and the Moon.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On Mars, it sharpens the boundaries between orange and greenish areas, and makes dust storms and polar ice caps stand out more. On Jupiter and Saturn, it enhances the cloud belts, and on the Moon, it brings out shadow play in craters.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-21-oranje-2-.jpg\" alt=\"Omegon Orange Color Filter #21 2-inch\" title=\"\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Wratten #21, orange<\/li><li>Blocks blue and green<\/li><li>Strong contrast on Mars, Jupiter, and Saturn<\/li><li>Standard 2-inch thread<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For telescopes with a 2-inch light path. Color filters work best on a telescope with an aperture of approximately 100 mm or larger: the filter absorbs light, and the aperture must be able to compensate for that.<\/p>\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>Type<\/strong><\/td><td>Color filter<\/td><\/tr><tr><td><strong>Wart number<\/strong><\/td><td>#21<\/td><\/tr><tr><td><strong>Color<\/strong><\/td><td>Orange<\/td><\/tr><tr><td><strong>Mount<\/strong><\/td><td>2 inches<\/td><\/tr><tr><td><strong>Glass<\/strong><\/td><td>Tinted optical glass<\/td><\/tr><tr><td><strong>Observation goals<\/strong><\/td><td>Moon and planets<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this brand at the <a href=\"\/en\/brands\/omegon\/\">Omegon brand page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Orange Wratten #21 color filter in a 2-inch mount. Enhances dust storms and polar caps on Mars and the belts of Jupiter and Saturn.<\/p>","protected":false},"featured_media":24869,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[3140,56],"product_tag":[],"class_list":["post-24864","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-maan-en-planetenfilters-kleurfilters","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":12891,"url":"https:\/\/www.telescoop.nl\/en\/omegon-set-kleurenfilters-125-6-delig\/","url_meta":{"origin":24864,"position":0},"title":"Omegon Color Filter Set 1.25 inch (6-piece)","author":"Info telescoop","date":"11-03-2025","format":false,"excerpt":"Six-piece 1.25-inch color filter set, including orange #21, red #25, yellow #12, and light blue #82A. The most affordable way to get started with color filters.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/03\/Omegon-Set-kleurenfilters-1-25-6-delig--e1741688202542.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":12895,"url":"https:\/\/www.telescoop.nl\/en\/omegon-planetenfilters-125\/","url_meta":{"origin":24864,"position":1},"title":"Omegon Planetary Filter 1.25 inch","author":"","date":"11-03-2025","format":false,"excerpt":"Loose planet filters in six colors with 1.25-inch thread. Each color enhances different structures on Jupiter, Saturn, Mars, or Venus.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/03\/Omegon-Set-kleurenfilters-1-25-6-delig--e1741688202542.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":24876,"url":"https:\/\/www.telescoop.nl\/en\/lichtrood-kleurfilter-2-inch-omegon-23a\/","url_meta":{"origin":24864,"position":2},"title":"Omegon Light Red Color Filter #23A 2-inch","author":"","date":"03-08-2025","format":false,"excerpt":"Light red Wratten #23A color filter in 2 inch format. Increases contrast on Mars and helps with structures in the atmospheres of Jupiter and Saturn.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Hellrot Farbfilter 2 Zoll \u2013 Omegon #23A","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":24858,"url":"https:\/\/www.telescoop.nl\/en\/geel-kleurfilter-2-inch-omegon-12\/","url_meta":{"origin":24864,"position":3},"title":"Omegon Yellow Color Filter #12 2-inch","author":"","date":"03-08-2025","format":false,"excerpt":"Yellow Warts #12 color filter in a 2-inch mount. Enhances the contrast of lunar craters, polar caps, and dust storms on Mars, as well as Jupiter&#x27;s cloud bands.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Gelb Farbfilter 2 Zoll \u2013 Omegon #12","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-12-geel-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-12-geel-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-12-geel-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-12-geel-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-12-geel-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-12-geel-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":24906,"url":"https:\/\/www.telescoop.nl\/en\/lichtgroen-kleurfilter-2-inch-omegon-56\/","url_meta":{"origin":24864,"position":4},"title":"Omegon Color Filter, Light Green #56, 2 inches","author":"","date":"03-08-2025","format":false,"excerpt":"Light green Wratten #56 color filter in 2 inch format. Strengthens contrast differences in the bands of Jupiter and the rings of Saturn.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Hellgr\u00fcn Farbfilter 2 Zoll \u2013 Omegon #56","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-56-lichtgroen-2-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-56-lichtgroen-2-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-56-lichtgroen-2-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-56-lichtgroen-2-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-56-lichtgroen-2-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-56-lichtgroen-2-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":24870,"url":"https:\/\/www.telescoop.nl\/en\/lichtrood-kleurfilter-125-inch-omegon-23a\/","url_meta":{"origin":24864,"position":5},"title":"Omegon Light Red Color Filter #23A 1.25 inch","author":"","date":"03-08-2025","format":false,"excerpt":"Light red Wratten #23A color filter for Mars. Makes polar caps, dust storms, and dark areas on the surface more clearly visible.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Hellrot Farbfilter 1,25 Zoll \u2013 Omegon #23A","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/08\/Omegon-Filters-kleurfilter-23A-lichtrood-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/24864","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=24864"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/24869"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=24864"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=24864"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=24864"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=24864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}