- \n
- For f\/2.6 to f\/3.6: use 3nm Pro Highspeed filters<\/li>\n
- For f\/>3.6: prefer standard 3nm Pro filters or Ultra 2.5nm filters<\/li>\n
- For f\/<2.6: use EDGE 4.5nm filters<\/li>\n<\/ul>\n
Performance and applications<\/h3>\n
- \n
- High transmission (>90%) and 3nm bandwidth for maximum contrast<\/li>\n
- Designed for f\/2.6 to f\/3.6 systems<\/li>\n
- Clean spectral profile to reduce halos around bright stars<\/li>\n
- OD5 out-of-band rejection (0.001%) to minimize light interference<\/li>\n
- One-piece substrate to eliminate internal reflections<\/li>\n
- Target objects: emission nebulae, planetary nebulae, Wolf-Rayet, supernova remnants<\/li>\n
- Suitable for polluted skies and dark sites<\/li>\n
- Imaging even with the Moon<\/li>\n
- Blackened edges for unmounted filters<\/li>\n
- Superior optical reliability reduces post-processing<\/li>\n<\/ul>\n
Technical specifications<\/h3>\n
\n\n
\n \nParameter<\/th>\n H-alpha<\/th>\n OIII<\/th>\n SII<\/th>\n<\/tr>\n<\/thead>\n \n FWHM<\/td>\n 3nm<\/td>\n 3nm<\/td>\n 3nm<\/td>\n<\/tr>\n \n Center wavelength (CWL)<\/td>\n 657.5nm<\/td>\n 501.9nm<\/td>\n 673.6nm<\/td>\n<\/tr>\n \n Max. transmission<\/td>\n 90%<\/td>\n 90%<\/td>\n 90%<\/td>\n<\/tr>\n \n Out-of-band discharge<\/td>\n \u2265OD5 @ 300-1000nm<\/td>\n<\/tr>\n \n Thickness<\/td>\n 2mm \u00b10.05mm (except \u00d850mm: 3mm \u00b10.05mm)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Optical quality<\/span><\/h3>\n
- \n
- Substrate: unglued single-piece optical glass<\/li>\n
- Surface quality: S\/D = 60\/40 (MIL-O-13830 standard)<\/li>\n
- Transmitted wavefront: \u03bb\/4 or better<\/li>\n
- Parallelism: < 30 arcsec<\/li>\n
- 3-year warranty against delamination<\/li>\n<\/ul>\n
Filter mount<\/h3>\n
- \n
- Antlia standard: 1.25'' (M28.5\u00d70.6), 2'' (M48x0.75)<\/li>\n
- Ultra-thin cell for reduced vignetting<\/li>\n
- Black anodized finish<\/li>\n
- Tamper-proof laser engraving<\/li>\n<\/ul>\n
Spectral shift curves (blueshift)<\/h3>\n
![\"\"](\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/Blueshift-Data.jpg\")
<\/div>\nSpectral curves<\/h3>\n
![\"\"](\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/Ha-3nm-Pro-highspeed-Spectrum.png\")
<\/div>\n<\/div>\n![\"\"](\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/OIII-3nm-Pro-highspeed-Spectrum.png\")
<\/div>\n<\/div>\n![\"\"](\"https:\/\/deep-space-astronomy.ch\/wp-content\/uploads\/2025\/04\/SII-3nm-Pro-highspeed-Spectrum.png\")
<\/div>\nNot recommended for :<\/h3>\n
- \n
- Solar observation<\/li>\n
- Visual observation at night<\/li>\n<\/ul>\n
Warning<\/h3>\n
NEVER LOOK AT THE SUN WITH THIS FILTER.<\/strong> This will result in serious eye damage.<\/p>","protected":false},"excerpt":{"rendered":"
Filtres Antlia SHO 3nm Pro Highspeed Optimis\u00e9s pour les syst\u00e8mes rapides (f\/2.6 \u00e0 f\/3.6) Les filtres SHO 3nm Pro Highspeed d\u2019Antlia sont optimis\u00e9s pour les syst\u00e8mes \u00e0 focales rapides gr\u00e2ce \u00e0 un pr\u00e9-d\u00e9calage de la longueur d\u2019onde centrale (CWL). Cette version sp\u00e9cialement con\u00e7ue am\u00e9liore significativement le rapport signal\/bruit (SNR) sur les t\u00e9lescopes \u00e0 rapports focaux […]<\/p>\n","protected":false},"featured_media":7068,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[791],"product_cat":[780],"product_tag":[],"class_list":{"0":"post-7057","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-antlia","7":"product_cat-filtres-bande-etroite","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-variable"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/7057","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=7057"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/7068"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=7057"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=7057"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=7057"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=7057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}