{"id":8710,"date":"2025-06-26T17:18:26","date_gmt":"2025-06-26T15:18:26","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=8710"},"modified":"2025-12-04T09:36:00","modified_gmt":"2025-12-04T08:36:00","slug":"sky-watcher-quattro-250p-f-4","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/sky-watcher-quattro-250p-f-4\/","title":{"rendered":"Sky-Watcher Quattro-250P (f\/4)"},"content":{"rendered":"
\n

Sky-Watcher Quattro 250P Imaging Newtonian - Astrographic telescope 254 mm f\/4<\/h1>\n

Visit Sky-Watcher Quattro 250P Imaging Newtonian<\/strong> is a 10-inch (254 mm) Newtonian telescope designed for the\u2019fast, high-performance astrophotography<\/strong>. With its f\/4 focal ratio<\/strong> and its oversized secondary mirror, it guarantees ideal coverage of modern full-format DSLR sensors and CCD cameras. It's a powerful, affordable solution for deep-sky photographers.<\/p>\n

A high-performance astrograph for your most ambitious images<\/h2>\n

Thanks to its 1000 mm focal length<\/strong> With its 254 mm aperture, the Quattro 250P allows short exposures while capturing maximum light. Its borosilicate parabolic mirror<\/strong> is covered with the exclusive Radiant\u2122 Aluminum Quartz\u2122 (RAQ\u2122)<\/strong>, offering a reflectivity of 94%<\/strong> for exceptional light output.<\/p>\n

The tube is made of rolled steel and coated with a Black Diamond\u00ab metallic finish\u00bb<\/strong>, This is an elegant yet robust design. The whole is completed by a focuser Crayford 2\u2033 double speed (10:1)<\/strong>, precise and fluid, ideal for fine-tuning photography.<\/p>\n

Technical specifications - Quattro 250P<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Optical data<\/strong><\/caption>\n
Lens type<\/td>\nNewtonian parabolic reflector<\/td>\n<\/tr>\n
Opening<\/td>\n254 mm<\/td>\n<\/tr>\n
Focal length<\/td>\n1000 mm<\/td>\n<\/tr>\n
Focus report<\/td>\nf\/4<\/td>\n<\/tr>\n
Glass type<\/td>\nBorosilicate<\/td>\n<\/tr>\n
Mirror coating<\/td>\nRadiant\u2122 Aluminum Quartz\u2122 (RAQ\u2122) - 94% Reflectivity<\/td>\n<\/tr>\n
Secondary diameter<\/td>\n89 mm (obstruction 35%)<\/td>\n<\/tr>\n
Surface obstruction<\/td>\n12%<\/td>\n<\/tr>\n
Separating power (Dawes)<\/td>\n0,46\u2033<\/td>\n<\/tr>\n
Rayleigh limit<\/td>\n0,55\u2033<\/td>\n<\/tr>\n
Magnitude limit<\/td>\n14,5<\/td>\n<\/tr>\n
Min.\/max. useful magnification.<\/td>\n36\u00d7 \/ 500\u00d7<\/td>\n<\/tr>\n
Light gain vs. 200 mm<\/td>\n+57%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Accessories and dimensions<\/strong><\/caption>\n
Focuser<\/td>\nCrayford 2\u2033 double speed (10:1)<\/td>\n<\/tr>\n
Researcher<\/td>\n9\u00d750 optical<\/td>\n<\/tr>\n
Adapters<\/td>\n1.25\u2033 and 2\u2033<\/td>\n<\/tr>\n
Eyepieces included<\/td>\nNone (designed for photography)<\/td>\n<\/tr>\n
Coma corrector<\/td>\nNot included (optional)<\/td>\n<\/tr>\n
Rings and mounting bar<\/td>\nVixen rings and dovetail included<\/td>\n<\/tr>\n
Tube length<\/td>\n92.7 cm (36.5\u2033)<\/td>\n<\/tr>\n
Tube outer diameter<\/td>\n289 mm (11,375\u2033)<\/td>\n<\/tr>\n
Weight with accessories<\/td>\n16.5 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Why choose the Quattro 250P?<\/h2>\n
    \n
  • Fast f\/4 ratio<\/strong> for shorter exposure times and a better signal-to-noise ratio<\/li>\n
  • Large secondary mirror<\/strong> for full illumination of full-format sensors<\/li>\n
  • Black Diamond finish<\/strong> robust and professional<\/li>\n
  • Compatible with EQ6 \/ EQ8 \/ AM5 frames<\/strong><\/li>\n
  • Possible developments<\/strong> with coma corrector for a perfectly corrected field<\/li>\n<\/ul>\n

    An affordable professional tube for demanding astrophotographers<\/h2>\n

    Visit Sky-Watcher Quattro 250P Imaging Newtonian<\/strong> combines power, speed and affordability. It's a strategic choice for enthusiasts wishing to move into advanced imaging with a large-diameter instrument, without compromising on optical quality. It is also ideally suited to wide-field, high-resolution visual use.<\/p>\n

    Order now<\/strong> your Quattro 250P in our specialist store - including fast delivery, technical support and personal assistance.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"

    Sky-Watcher Quattro 250P Imaging Newtonian \u2013 T\u00e9lescope Astrographe 254 mm f\/4 Le Sky-Watcher Quattro 250P Imaging Newtonian est un t\u00e9lescope newtonien de 10 pouces (254 mm) con\u00e7u pour l\u2019astrophotographie rapide et performante. Avec son rapport focal f\/4 et son miroir secondaire surdimensionn\u00e9, il garantit une couverture id\u00e9ale des capteurs DSLR plein format et cam\u00e9ras CCD […]<\/p>\n","protected":false},"featured_media":9761,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[822],"product_cat":[747,392],"product_tag":[],"class_list":["post-8710","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-newton","product_cat-telescopes_reflecteurs","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/8710","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=8710"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/9761"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=8710"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=8710"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=8710"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=8710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}