{"id":11040,"date":"2025-09-26T16:29:38","date_gmt":"2025-09-26T14:29:38","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=11040"},"modified":"2025-09-26T16:29:52","modified_gmt":"2025-09-26T14:29:52","slug":"svbony-sv555-astrographe-petzval-54-mm-f-4-5","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/svbony-sv555-astrographe-petzval-54-mm-f-4-5\/","title":{"rendered":"SVBONY SV555 - Petzval Astrograph 54 mm f\/4.5"},"content":{"rendered":"<div class=\"product-description\">\n<h3>SVBONY SV555 - Petzval 54 mm f\/4.5 Astrograph (full format)<\/h3>\n<p>Compact, fast and designed for the deep sky, the SVBONY SV555 is a Petzval-type astrograph.<br \/>\noffering a flat image over a useful 44 mm circle (full format). With its 243 mm focal length and<br \/>\nWith its variable aperture from f\/4.5 to f\/22, it covers a wide field, ideal for large nebulae,<br \/>\nHII regions, stellar clouds and object-rich constellations. Its 5-lens design in<br \/>\n3 groups, including triplet and ED lenses, deliver fine stars and excellent chromatism<br \/>\ncontrolled, without the need for additional corrector.<\/p>\n<h3>Why we love it at Deep Space<\/h3>\n<ul>\n<li><strong>Full format 44 mm<\/strong> flat image and low vignetting for 24\u00d736 sensors.<\/li>\n<li><strong>Ultra-wide field<\/strong> 243 mm focal length to capture extensive nebulae in just a few shots.<\/li>\n<li><strong>Variable aperture f\/4.5 \u2192 f\/22<\/strong> control of bright stars, flexibility in long exposure and HDR shots.<\/li>\n<li><strong>Optique Petzval<\/strong> 5 elements \/ 3 groups: no backfocus to \"optimize\", flattening is native.<\/li>\n<li><strong>Careful &amp; lightweight construction<\/strong> screw-on light shield, improved finish, reduced weight for on-the-go photography.<\/li>\n<li><strong>Lockable 360\u00b0 rotation<\/strong> precise cropping of the field without twisting the cables.<\/li>\n<li><strong>Standard photo connection<\/strong> M48x0.75 (2\u2033) rear thread and M72 front filter for light shield\/filter.<\/li>\n<\/ul>\n<h3>Optics and star rendering<\/h3>\n<p>The SV555 uses a modern Petzval formula: a lens unit at the front and a corrector unit at the rear.<br \/>\nback to flatten the field. The combination includes a triplet and ED (Extra-low) lenses.<br \/>\nDispersion) to minimize chromatic aberration and preserve round stars right up to the corners.<br \/>\nfull format. In the field, this translates into fast pointing, efficient MAP and rough handling.<br \/>\nwith no separate corrector to add or space out.<\/p>\n<h3>Ergonomics, assembly and compatibility<\/h3>\n<p>The rear ends in an M48x0.75 male thread: you can screw on a filter wheel directly,<br \/>\na 2\u2033 filter drawer or a housing adapter (T-ring M48). The supplied PCB adopts a<br \/>\nVixen\/Arca-Swiss type for easy mounting on many photo heads, equatorial heads, etc.<br \/>\nor travel frames. The 360\u00b0 rotation with lock makes framing easy, and focusing<br \/>\nhelical stitch for fine, stable adjustment.<\/p>\n<h3>Who's the SV555 for?<\/h3>\n<ul>\n<li><strong>Ambitious beginners<\/strong> A true \"plug-and-play\" of the wide field, without the headache of backfocus.<\/li>\n<li><strong>Nomads<\/strong> compact setup for light frames (harmonic\/nomadic) and dark-sky travel.<\/li>\n<li><strong>Mosaic &amp; H\u03b1\/OIII strip designers<\/strong> short focal length, wide field of view, wise stars; perfect for duo-bands.<\/li>\n<li><strong>Full-format users<\/strong> 24\u00d736 sensors with a 44 mm image circle.<\/li>\n<\/ul>\n<h3>DSA tips for beautiful first lights<\/h3>\n<ul>\n<li>On color CMOS, a 2\u2033 duo-band filter on the M48 helps a lot in peri-urban areas.<\/li>\n<li>Set MAP to f\/4.5 (faint stars visible), then close down one or two notches to tame the halos of very bright stars.<\/li>\n<li>Keep the optical train screwed down (avoid ring tightening) for optimum orthogonality and repeatability.<\/li>\n<li>Use 360\u00b0 rotation to compose precisely around large objects (Heart\/Soul, North America, summer Milky Way, etc.).<\/li>\n<\/ul>\n<h3>Technical specifications<\/h3>\n<table class=\"spec-table\">\n<tbody>\n<tr>\n<td><strong>Optical type<\/strong><\/td>\n<td>APO Petzval, 5 elements in 3 groups (including a triplet)<\/td>\n<\/tr>\n<tr>\n<td><strong>Opening<\/strong><\/td>\n<td>54 mm<\/td>\n<\/tr>\n<tr>\n<td><strong>Focal length<\/strong><\/td>\n<td>243 mm<\/td>\n<\/tr>\n<tr>\n<td><strong>f\/D ratio<\/strong><\/td>\n<td>f\/4.5 (variable up to f\/22)<\/td>\n<\/tr>\n<tr>\n<td><strong>Image circle<\/strong><\/td>\n<td>\u00d8 44 mm (full format)<\/td>\n<\/tr>\n<tr>\n<td><strong>Focusing<\/strong><\/td>\n<td>Precision Helical<\/td>\n<\/tr>\n<tr>\n<td><strong>Rotator<\/strong><\/td>\n<td>360\u00b0 rotation with lock<\/td>\n<\/tr>\n<tr>\n<td><strong>Rear thread<\/strong><\/td>\n<td>M48\u00d70.75 (2\u2033)<\/td>\n<\/tr>\n<tr>\n<td><strong>Front thread<\/strong><\/td>\n<td>M72<\/td>\n<\/tr>\n<tr>\n<td><strong>Turntable<\/strong><\/td>\n<td>Dovetail ~184 mm, compat. Vixen\/Arca-Swiss (depending on series)<\/td>\n<\/tr>\n<tr>\n<td><strong>Optical treatment<\/strong><\/td>\n<td>FMC (full multilayer)<\/td>\n<\/tr>\n<tr>\n<td><strong>Weight (bare)<\/strong><\/td>\n<td>\u2248 2.45 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Contents (may vary by batch)<\/h3>\n<ul>\n<li>SVBONY SV555 astro telephoto lens (body &amp; light shield)<\/li>\n<li>Mounting handle, bracket and dovetail<\/li>\n<li>Protective caps, clamps depending on version<\/li>\n<li>Manufacturer's documentation<\/li>\n<\/ul>\n<h3>Compatibility &amp; useful accessories (DSA)<\/h3>\n<ul>\n<li><strong>Filter drawer 2\u2033 M48<\/strong> for duo-bands \/ L-Pro \/ H\u03b1 in polluted skies.<\/li>\n<li><strong>2\u2033 filter wheel<\/strong> for a neat LRGB\/SHO setup in mono.<\/li>\n<li><strong>OAG compact<\/strong> if you guide; otherwise mini-lunette guides 30 mm.<\/li>\n<li><strong>Lightweight frame<\/strong> (harmonic\/nomadic): moderate payload recommended.<\/li>\n<\/ul>\n<h3>Things to remember<\/h3>\n<p>The SV555 is a full-frame wide-frame that's simple and efficient: screw it on, frame it, shoot it. Its<br \/>\n243mm focal length and bright f\/4.5 open up a wide range of targets, even on short nights.<br \/>\nStar rendering, native flatness and M48 connection make it an excellent choice for entry (or<br \/>\nprogress) in deep-sky astrophotography with true image quality, without the addition of a corrector.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>SVBONY SV555 \u2013 Astrographe Petzval 54 mm f\/4.5 (plein format) Compact, rapide et con\u00e7u pour le ciel profond, le SVBONY SV555 est un astrographe de type Petzval offrant une image plane sur tout un cercle utile de 44 mm (plein format). Avec sa focale de 243 mm et son ouverture variable de f\/4.5 \u00e0 f\/22, [&hellip;]<\/p>\n","protected":false},"featured_media":11043,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[843],"product_cat":[755],"product_tag":[],"class_list":["post-11040","product","type-product","status-publish","has-post-thumbnail","product_brand-svbony","product_cat-lunettes-apochromatiques","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/11040","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=11040"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/11043"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=11040"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=11040"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=11040"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=11040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}