{"id":7126,"date":"2025-04-26T13:30:01","date_gmt":"2025-04-26T11:30:01","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=7126"},"modified":"2026-03-29T17:53:06","modified_gmt":"2026-03-29T15:53:06","slug":"filtre-sii-antlia-4-5nm-edge","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/filtre-sii-antlia-4-5nm-edge\/","title":{"rendered":"SII Antlia 4.5nm Edge filter"},"content":{"rendered":"

Antlia SII 4.5nm EDGE filter<\/h3>\n

Capture ionized sulfur emissions with exceptional clarity thanks to the Antlia SII 4.5nm EDGE filter.<\/strong> Designed for astrophotography, this filter optimizes transmission and contrast for detailed images of the deep sky.<\/p>\n

\"\"<\/div>\n

Why choose the Antlia SII 4.5nm EDGE filter?<\/h2>\n
    \n
  • High transmission<\/strong> (>90% at 672.4nm) to capture the faintest SII nebular structures.<\/li>\n
  • Narrow bandwidth<\/strong> of 4.5nm to maximize contrast and reduce sky background.<\/li>\n
  • OD5 deletion<\/strong> parasitic wavelengths for a better signal-to-noise ratio.<\/li>\n
  • Fast compatibility<\/strong> with lenses up to f\/3 without significant signal loss.<\/li>\n
  • High-quality manufacturing<\/strong> One-piece optical substrate, scratch-resistant surface treatment, blackened edges.<\/li>\n<\/ul>\n

    Ideal applications<\/h2>\n
      \n
    • Imaging SII emission nebulae<\/li>\n
    • Observation of planetary nebulae and Wolf-Rayet<\/li>\n
    • Capturing supernova remnants<\/li>\n
    • Use on polluted skies or dark sites<\/li>\n
    • Extended photo sessions despite the presence of the Moon<\/li>\n<\/ul>\n

      Filter technical specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Features<\/th>\nDetail<\/th>\n<\/tr>\n<\/thead>\n
      Type<\/td>\nSII 4.5nm EDGE<\/td>\n<\/tr>\n
      FWHM (Full Width at Half Maximum)<\/td>\n4.5nm<\/td>\n<\/tr>\n
      Center wavelength (CWL)<\/td>\n672.4nm<\/td>\n<\/tr>\n
      Maximum transmission<\/td>\n>90%<\/td>\n<\/tr>\n
      Out-of-band blocking<\/td>\nOD5 (0.001%) between 300-1000nm<\/td>\n<\/tr>\n
      Filter thickness<\/td>\n2mm \u00b1 0.05mm (\u00d850mm: 3mm \u00b1 0.05mm)<\/td>\n<\/tr>\n
      Substrate<\/td>\nUnglued monoblock optical glass<\/td>\n<\/tr>\n
      Surface quality<\/td>\nS\/D 60\/40 (MIL-O-13830)<\/td>\n<\/tr>\n
      Transmitted wavefront<\/td>\n\u03bb\/4 or better<\/td>\n<\/tr>\n
      Parallelism<\/td>\n<30 arcsec<\/td>\n<\/tr>\n
      Warranty<\/td>\n3 years against delamination<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Available sizes<\/h2>\n
        \n
      • Mounted: 1.25\u2033, 2\u2033<\/li>\n
      • Unmounted: \u00d831mm, \u00d836mm, \u00d850mm<\/li>\n<\/ul>\n

        Frame features<\/h2>\n
          \n
        • Ultra-thin frame to reduce vignetting<\/li>\n
        • Black anodized finish for optimum protection<\/li>\n
        • Tamper-proof laser engraving for durable identification<\/li>\n<\/ul>\n

          Spectral curves<\/h2>\n
          \"\"<\/div>\n

          Important notice<\/h2>\n

          Never look directly at the sun with this filter.<\/strong> This would cause serious, irreversible eye damage.<\/p>\n

           <\/p>\n

           <\/p>","protected":false},"excerpt":{"rendered":"

          Filtre Antlia SII 4.5nm EDGE Capturez les \u00e9missions de soufre ionis\u00e9 avec une clart\u00e9 exceptionnelle gr\u00e2ce au filtre Antlia SII 4.5nm EDGE. Con\u00e7u pour l’astrophotographie, ce filtre optimise la transmission et le contraste pour des images d\u00e9taill\u00e9es du ciel profond. Pourquoi choisir le filtre Antlia SII 4.5nm EDGE\u00a0? Transmission \u00e9lev\u00e9e (>90% \u00e0 672.4nm) pour capturer […]<\/p>\n","protected":false},"featured_media":7140,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[791],"product_cat":[780,801,833],"product_tag":[],"class_list":{"0":"post-7126","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-antlia","7":"product_cat-filtres-bande-etroite","8":"product_cat-filtre-astrophotographie-du-ciel-profond","9":"product_cat-en-stock","11":"first","12":"instock","13":"taxable","14":"shipping-taxable","15":"purchasable","16":"product-type-variable"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/7126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=7126"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/7140"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=7126"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=7126"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=7126"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=7126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}