Visit Sky-Watcher Explorer 250PDS<\/strong> is a 254 mm diameter Newton telescope, designed for demanding amateur astronomers who want to explore in detail the most discrete objects in the deep sky, while enjoying excellent performance on the Moon and planets. With a 1200 mm focal length and f\/4.7 focal ratio, it offers a perfect balance between brightness, field and precision.<\/p>\n With an aperture of 25.4 cm, this telescope captures more than 1270 times more light<\/strong> than the human eye, revealing faint galaxies, subtle nebulae and distant clusters with astonishing clarity. The diffraction-limited parabolic mirror maintains remarkable sharpness even at high magnification, while offering optimal contrast on the lunar surface or Jupiter's cloud bands.<\/p>\n The 2\u2033 Crayford-type focuser, mounted on ball bearings, guarantees smooth focusing even with heavy accessories such as cameras or wide-field eyepieces. The 1:10 gearing allows micrometric adjustment ideal for high-resolution photography and the perfect focus on diffuse objects.<\/p>\n With its f\/4.7 ratio, the Explorer 250PDS is a fast instrument<\/strong>ideal for reducing exposure times in astrophotography. Mounted on an EQ6-R, AZ-EQ6 or equivalent, it becomes a formidable machine for capturing planetary nebulae, spiral galaxies or large H\u03b1 complexes.<\/p>\n This tube is supplied without frame. For visual use, a EQ5 or HEQ5<\/strong> is a minimum. For photography, we recommend a EQ6-R or AZ-EQ6<\/strong>. You can also add high-magnification eyepieces, a 2x Barlow lens or a lunar filter for greater comfort during lunar observation.<\/p>\n Visit Sky-Watcher 250PDS<\/strong> is an excellent gateway to advanced astronomy. Bright, fast, versatile and precise, it's a wise choice for passionate visual astronomers as well as for those who want to get serious about deep-sky astrophotography.<\/p>","protected":false},"excerpt":{"rendered":" Sky-Watcher Explorer 250PDS \u2013 Le Newton 10″ ultra-lumineux pour passionn\u00e9s du ciel profond Le Sky-Watcher Explorer 250PDS est un t\u00e9lescope Newton de 254 mm de diam\u00e8tre, pens\u00e9 pour les astronomes amateurs exigeants souhaitant explorer en d\u00e9tail les objets les plus discrets du ciel profond tout en profitant d’une excellente performance sur la Lune et les […]<\/p>\n","protected":false},"featured_media":9181,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[822],"product_cat":[392,747],"product_tag":[],"class_list":["post-8708","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-telescopes_reflecteurs","product_cat-newton","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/8708","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=8708"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/9181"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=8708"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=8708"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=8708"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=8708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}A 254 mm mirror: an opening that changes everything<\/h3>\n
Precise focusing with Crayford DualSpeed<\/h3>\n
A fast, open Newton for photography<\/h3>\n
Technical specifications<\/h3>\n
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\n \nFeatures<\/th>\n Value<\/th>\n<\/tr>\n<\/thead>\n \n Optical type<\/strong><\/td>\n Newton reflector<\/td>\n<\/tr>\n \n Mirror diameter<\/strong><\/td>\n 254 mm<\/td>\n<\/tr>\n \n Focal length<\/strong><\/td>\n 1200 mm<\/td>\n<\/tr>\n \n F\/D ratio<\/strong><\/td>\n f\/4.7<\/td>\n<\/tr>\n \n Focuser<\/strong><\/td>\n Crayford 2\u2033 with 1:10 reduction and 1.25\u2033 adapter<\/td>\n<\/tr>\n \n Theoretical resolution<\/strong><\/td>\n 0.45 arcsec<\/td>\n<\/tr>\n \n Magnitude limit<\/strong><\/td>\n 13,8<\/td>\n<\/tr>\n \n Magnification supplied<\/strong><\/td>\n ~43x (with 28 mm eyepiece included)<\/td>\n<\/tr>\n \n Eyepiece included<\/strong><\/td>\n LET 28 mm 2\u2033<\/td>\n<\/tr>\n \n Researcher<\/strong><\/td>\n 9\u00d750 wide-field optics<\/td>\n<\/tr>\n \n Tube structure<\/strong><\/td>\n Solid tube, marked mirror for collimation, fine spider 0.5 mm<\/td>\n<\/tr>\n \n Pipe weight with clamps<\/strong><\/td>\n 14.5 kg<\/td>\n<\/tr>\n \n Mounting<\/strong><\/td>\n Vixen dovetail with clamps<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Supplied with :<\/h3>\n
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What you need to get started<\/h3>\n
Conclusion<\/h3>\n