{"title":"Poids pour queue d'aronde","description":"\u003cdiv\u003e\n  \u003cp\u003e\n    Balancing a telescope is not always a matter of sliding it in the rings. Sometimes the tube is too short, the camera train too heavy, or the accessory rail too far forward for balance to be achieved by position alone — and a small weight mounted on the dovetail solves it without adding mass at the counterweight end. David Astro carries dovetail weights in Canada, in stock and shipping from Canada.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    Tell us where your balance point sits and what is on the rig, and we will tell you whether a dovetail weight is the right answer.\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- more --\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eFine Balance Without More Counterweight\u003c\/h2\u003e\n  \u003cp\u003e\n    A dovetail weight adds mass on the telescope side of the axis, which lets you shift the balance point without moving the tube or adding a large counterweight below.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShort tubes with heavy cameras:\u003c\/strong\u003e A compact refractor with a filter wheel and camera can shift the balance point behind the rings' adjustment range, which a small forward weight corrects.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDeclination axis balance:\u003c\/strong\u003e Weights mounted on an accessory rail correct imbalance perpendicular to the tube, which is otherwise awkward to address.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSliding adjustment:\u003c\/strong\u003e Weights that slide along the dovetail let you fine-tune balance without changing the weight itself.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLess total mass:\u003c\/strong\u003e Adding a small weight near the axis achieves the same balance as a much larger counterweight far below it, which reduces total payload.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRotational inertia:\u003c\/strong\u003e Keeping mass close to the axis lowers inertia, which generally improves how the mount responds to guiding corrections.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDovetail standard:\u003c\/strong\u003e Weights are made for Vixen or Losmandy bars, and must match the bar you are mounting them on.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eWhy Choose David Astro for Dovetail Weights\u003c\/h2\u003e\n  \u003cp\u003e\n    Balance problems have several solutions, and adding weight is not always the best one.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAlternatives considered first:\u003c\/strong\u003e A longer dovetail or repositioned rings often solves the problem without adding mass, and we will say when that applies.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBoth axes addressed:\u003c\/strong\u003e We help diagnose whether your imbalance is in right ascension, declination or both, since the fix differs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStandard matched:\u003c\/strong\u003e We confirm the weight fits your dovetail standard before shipping.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAuthorized dealer:\u003c\/strong\u003e Genuine hardware with manufacturer warranty, in Canadian stock.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShips from Canada:\u003c\/strong\u003e No duties or brokerage fees for Canadian buyers.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eDovetail Weights in Canada — Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003e\u003cstrong\u003eWhen do I need a dovetail weight?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eWhen your rings have reached the end of the bar and the telescope still will not balance, usually because a heavy camera train has moved the centre of mass too far back.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eIs a longer dovetail better than a weight?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eUsually, because it adds adjustment range rather than mass. A weight is the right answer when a longer bar is not available or would foul the mount.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eDoes adding weight hurt my payload?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eIt counts against it, but a small weight near the axis substitutes for a much larger counterweight below, so the net effect on total system mass is often favourable.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eHow do I balance in declination?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eRotate the mount so the tube points horizontally with the counterweight bar level, then check whether the telescope wants to rotate about its own long axis. A weight on an accessory rail corrects it.\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eStruggling to balance?\u003c\/h2\u003e\n  \u003cp\u003eTell us your rig and where the balance point sits and we will suggest the fix. Ships from Canada.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"baader-d-series-1kg-leveling-counterweight-3-riderclamp","title":"Baader Série D - Contrepoids de 1 kg avec Riderclamp 3\"","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eFabriqué en acier inoxydable V2A\u003c\/li\u003e\n\n\u003cli\u003eY compris une pince à cavalier de 3 \"\/ 60 mm de long pour monter sur des queues d'aronde de 3\" (style Losmandy)\u003c\/li\u003e\n\n\u003cli\u003e1 kg\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967372521757,"sku":"BAA-2451576","price":117.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-D-Series-1kg-Leveling-Counterweight-3-inch-Riderclamp-1__35295.1597111052.1280.1280.jpg?v=1684341327"},{"product_id":"baader-v-series-1kg-leveling-counterweight-clamp","title":"Baader Série V - Contrepoids Série V 1kg","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eFabriqué en acier inoxydable V2A\u003c\/li\u003e\n\n\u003cli\u003eY compris collier en V 70mm diam. à monter sur queues d'aronde en V (norme Vixen)\u003c\/li\u003e\n\n\u003cli\u003e1 kg\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967372587293,"sku":"BAA-2451531","price":132.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-V-Series-1kg-Leveling-Counterweight-Clamp-1__48598.1597111054.1280.1280.jpg?v=1684341334"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/dovetail-weights.oembed","provider":"David Astro","version":"1.0","type":"link"}