{"product_id":"farpoint-6-inch-57-3-series-universal-dovetail-plate","title":"Farpoint 6 Inch 57.3 Series Universal Dovetail Plate (Radian Bar)","description":"\u003c!--FPSEO|v1|20260610|1111110111101010N0--\u003e\n\u003cstyle\u003e\n.fp-dvt{font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,\"Helvetica Neue\",Arial,sans-serif;line-height:1.6;color:#2a2a2a;max-width:900px;}\n.fp-dvt *{box-sizing:border-box;}\n.fp-dvt h2{font-size:1.45em;font-weight:700;color:#0d1333;margin:30px 0 12px;line-height:1.25;}\n.fp-dvt h3{font-size:1.05em;font-weight:600;color:#0d1333;margin:0 0 8px;}\n.fp-dvt p{margin:0 0 14px;}\n.fp-dvt a{color:#b8862a;font-weight:600;text-decoration:none;}\n.fp-dvt a:hover{text-decoration:underline;}\n.fp-dvt strong{color:#0d1333;}\n.fp-dvt .badge{display:inline-block;background:#0d1333;color:#c9a84c;padding:5px 14px;border-radius:20px;font-size:0.76em;font-weight:700;letter-spacing:0.07em;text-transform:uppercase;margin-bottom:14px;}\n.fp-dvt .lead{font-size:1.15em;color:#0d1333;font-weight:600;margin-bottom:10px;}\n.fp-dvt .specs{border:1px solid #e0ddd4;border-radius:10px;overflow:hidden;margin:18px 0;}\n.fp-dvt .specs .row{display:flex;border-top:1px solid #ece9e1;}\n.fp-dvt .specs .row:first-child{border-top:0;}\n.fp-dvt .specs .k{flex:0 0 42%;background:#f9f7f1;padding:12px 16px;font-weight:700;color:#0d1333;font-size:0.9em;}\n.fp-dvt .specs .v{flex:1;padding:12px 16px;font-size:0.9em;}\n.fp-dvt .cmp{border:1px solid #e0ddd4;border-radius:10px;overflow:hidden;margin:16px 0;}\n.fp-dvt .crow{display:flex;border-top:1px solid #ece9e1;}\n.fp-dvt .crow:first-child{border-top:0;}\n.fp-dvt .crow \u003e div{padding:11px 14px;font-size:0.9em;}\n.fp-dvt .chead{background:#0d1333;}\n.fp-dvt .chead \u003e div{color:#c9a84c;font-weight:700;font-size:0.78em;text-transform:uppercase;letter-spacing:0.04em;}\n.fp-dvt .cm{flex:0 0 38%;font-weight:600;color:#0d1333;}\n.fp-dvt .cc{flex:0 0 24%;}\n.fp-dvt .ct{flex:1;}\n.fp-dvt .cnow{background:#fffbed;}\n.fp-dvt .cnow .cm{color:#6a4f12;}\n.fp-dvt .tag{display:inline-block;background:#b8862a;color:#fff;font-size:0.72em;font-weight:700;padding:1px 7px;border-radius:10px;margin-left:6px;vertical-align:middle;text-transform:uppercase;letter-spacing:0.03em;}\n.fp-dvt .cnote{font-size:0.82em;color:#777;margin-top:8px;}\n.fp-dvt .callout{background:#fffbed;border:1px solid #e6c878;border-left:5px solid #b8862a;border-radius:8px;padding:16px 20px;margin:18px 0;font-size:0.95em;}\n.fp-dvt .callout strong{color:#6a4f12;}\n.fp-dvt details{background:#fafafa;border:1px solid #e6e4dd;border-radius:6px;margin-bottom:10px;}\n.fp-dvt details[open]{border-color:#b8862a;background:#fff;}\n.fp-dvt summary{cursor:pointer;padding:14px 50px 14px 18px;font-weight:600;color:#0d1333;list-style:none;position:relative;}\n.fp-dvt summary::-webkit-details-marker{display:none;}\n.fp-dvt summary::after{content:'+';position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:1.4em;color:#b8862a;font-weight:400;}\n.fp-dvt details[open] summary::after{content:'\\2212';}\n.fp-dvt .faq-body{padding:0 18px 16px;font-size:0.95em;}\n.fp-dvt .faq-body p{margin:0 0 10px;}\n.fp-dvt .faq-body p:last-child{margin:0;}\n.fp-dvt .cta{background:linear-gradient(135deg,#0d1333,#1a1f3d);color:#fff;border-radius:10px;padding:22px 24px;margin-top:26px;}\n.fp-dvt .cta h3{color:#fff;margin-bottom:6px;font-size:1.1em;}\n.fp-dvt .cta p{color:rgba(255,255,255,0.85);margin-bottom:14px;font-size:0.95em;}\n.fp-dvt .cta a{display:inline-block;background:#c9a84c;color:#0d1333;padding:10px 22px;border-radius:5px;font-weight:700;margin:4px 8px 4px 0;}\n.fp-dvt .cta a:hover{background:#d4b75c;text-decoration:none;}\n@media(max-width:600px){.fp-dvt .specs .row{flex-direction:column;}.fp-dvt .specs .k{flex:none;}.fp-dvt .crow{flex-wrap:wrap;}.fp-dvt .cm{flex:0 0 100%;}.fp-dvt .cc{flex:0 0 40%;}}\n\u003c\/style\u003e\n\n\u003cdiv class=\"fp-dvt\"\u003e\n\n\u003cspan class=\"badge\"\u003eFarpoint Dovetail System · Radian Bar Design\u003c\/span\u003e\n\u003cp class=\"lead\"\u003eThe Radian bar design in its most compact form — 6″ of light-weighted D-size dovetail.\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003e6″ 57.3 Series universal dovetail bar\u003c\/strong\u003e is the shortest member of the family that began as the \u003cstrong\u003eRadian lightweight universal D-style dovetail bar\u003c\/strong\u003e Farpoint manufactured for OPT. The same light-weighted design and mounting hole options, sized down for compact optical tubes, guide scope duty, and accessory mounting where a full-length bar is overkill. D-size (Losmandy-style). Machined of sturdy aluminum with a black anodized finish. CNC-machined in the USA.\u003c\/p\u003e\n\n\u003ch2\u003eFrom Radian Bar to 57.3 Series\u003c\/h2\u003e\n\u003cp\u003eFarpoint manufactured the original 14″ bars for OPT (Oceanside Photo \u0026amp; Telescope), who sold them under the \u003cstrong\u003eRadian Telescopes\u003c\/strong\u003e brand. When OPT closed its doors, we continued the line under the 57.3 Series name — same tooling, same USA machining, sold direct from the manufacturer — and expanded the design into this compact 6″ length plus a long 21.5″ version.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"specs\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"k\"\u003eBar length\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003e6″\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"k\"\u003eSeries\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003e57.3 Series — extended from the original Radian bar design\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"k\"\u003eBar standard\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003eD-size (Losmandy-style)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"k\"\u003eDesign\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003eLight-weighted universal bar — mounting hole options\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"k\"\u003eFinish\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003eBlack anodized aluminum\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"k\"\u003eConstruction\u003c\/div\u003e\n\u003cdiv class=\"v\"\u003eCNC-machined in the USA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eWhich Universal Bar?\u003c\/h2\u003e\n\u003cdiv class=\"cmp\"\u003e\n\u003cdiv class=\"crow chead\"\u003e\n\u003cdiv class=\"cm\"\u003eBar\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003eLength\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eHoles\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/farpoint-bread-board-style-dovetail-plate\"\u003eBread Board Plate\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e6″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003e1\/4-20 tapped + through holes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/farpoint-7-inch-universal-dovetail-plate\"\u003eUniversal 7″\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e7″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eVariety of mounting holes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/farpoint-14-inch-universal-dovetail-plate\"\u003eUniversal 14″\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e14″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eVariety of mounting holes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/farpoint-7-inch-metric-universal-dovetail-plate\"\u003eMetric 7″\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e7″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003e60mm — William Optics \u0026amp; Asian clamshell rings\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/farpoint-10-inch-metric-universal-dovetail-plate\"\u003eMetric 10″\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e10″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003e60mm — William Optics \u0026amp; Asian clamshell rings\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/farpoint-14-inch-metric-universal-dovetail-plate\"\u003eMetric 14″\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e14″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003e60mm — William Optics \u0026amp; Asian clamshell rings\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow cnow\"\u003e\n\u003cdiv class=\"cm\"\u003e57.3 Series 6″\u003cspan class=\"tag\"\u003eThis model\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e6″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eLight-weighted Radian design\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/universal-d-series-dovetail-plate-14inch\"\u003e57.3 Series 14″ (Radian)\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e14″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eVariety of mounting holes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"crow\"\u003e\n\u003cdiv class=\"cm\"\u003e\u003ca href=\"\/products\/universal-d-size-57-3-series-dovetail-plate-21-5-inch\"\u003e57.3 Series 21.5″\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"cc\"\u003e21.5″\u003c\/div\u003e\n\u003cdiv class=\"ct\"\u003eVariety of mounting holes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"callout\"\u003e\n\u003cstrong\u003eCheck your hole pattern before ordering.\u003c\/strong\u003e Need mounting-hole locations and measurements? \u003ca href=\"mailto:support@cxbastro.com\"\u003eEmail us\u003c\/a\u003e for the product drawing, or to confirm fit with your tube and rings.\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this the Radian dovetail bar?\u003c\/summary\u003e\n\u003cdiv class=\"faq-body\"\u003e\n\u003cp\u003eIt's our compact extension of it. Farpoint manufactured the original 14″ bars for OPT (Oceanside Photo \u0026amp; Telescope), who sold them under the Radian Telescopes brand. With OPT now closed, we sell the line direct under the 57.3 Series name — and this 6″ brings the same design to the smallest rigs. The original length lives on as the \u003ca href=\"\/products\/universal-d-series-dovetail-plate-14inch\"\u003e57.3 Series 14″ bar\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy choose the compact 6″ length?\u003c\/summary\u003e\n\u003cdiv class=\"faq-body\"\u003e\n\u003cp\u003eSmall refractors, guide scope rigs, and accessory assemblies don't need 14″ of bar — the 6″ keeps the footprint and weight down while giving you a full D-size dovetail. Need more reach? Step up to the \u003ca href=\"\/products\/universal-d-series-dovetail-plate-14inch\"\u003e14″ original Radian length\u003c\/a\u003e or the \u003ca href=\"\/products\/universal-d-size-57-3-series-dovetail-plate-21-5-inch\"\u003e21.5″ bar\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat mounts will this work with?\u003c\/summary\u003e\n\u003cdiv class=\"faq-body\"\u003e\n\u003cp\u003eAny mount with a D-size (Losmandy-style) saddle. Mount still has a small Vixen saddle? Our \u003ca href=\"\/collections\/d-size-dovetail-saddles\"\u003eD-size saddles and conversions\u003c\/a\u003e upgrade it.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"cta\"\u003e\n\u003ch3\u003eBuilding out a D-size dovetail rig?\u003c\/h3\u003e\n\u003cp\u003eBrowse all universal bars, or start with the dovetail system guide.\u003c\/p\u003e\n\u003ca href=\"\/collections\/universal-dovetails\"\u003eShop universal D-size bars\u003c\/a\u003e\n\u003ca href=\"\/pages\/telescope-dovetails\"\u003eRead the dovetail guide\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the Farpoint 6 inch 57.3 Series bar related to the Radian dovetail bar?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Farpoint manufactured the original 14 inch Radian lightweight universal D-style dovetail bars for OPT (Oceanside Photo and Telescope). With OPT now closed, Farpoint sells the line direct under the 57.3 Series name, and the 6 inch bar brings that same USA-made design to compact optical tubes and guide scope rigs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why choose the compact 6 inch length?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Small refractors, guide scope rigs, and accessory assemblies do not need a full-length bar. The 6 inch keeps footprint and weight down while providing a full D-size (Losmandy-style) dovetail. 14 inch and 21.5 inch lengths are also available.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What mounts does the 6 inch 57.3 Series bar work with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Any mount with a D-size (Losmandy-style) saddle. FarpointAstro also sells D-size saddles and saddle conversions for mounts that ship with smaller Vixen-style saddles.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Farpoint","offers":[{"title":"Default Title","offer_id":47902130372761,"sku":"FDP573-6","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/6639\/8617\/files\/shopping.webp?v=1781241398","url":"https:\/\/farpointastro.com\/products\/farpoint-6-inch-57-3-series-universal-dovetail-plate","provider":"FarpointAstro","version":"1.0","type":"link"}