{"product_id":"william-optics-pier-mount-90","title":"William Optics Pier Mount 90","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e90 kg (198 lbs) Loading Capacity\u003c\/li\u003e\n\u003cli\u003eLightweight 7 kg Aluminum Alloy Construction\u003c\/li\u003e\n\u003cli\u003e100 mm (4\") Diameter Pillar for Maximum Rigidity\u003c\/li\u003e\n\u003cli\u003eIncludes 3\/8\" Adapter for ZWO AM3 \u0026amp; AM5 Mounts\u003c\/li\u003e\n\u003cli\u003e89.3 cm Fixed Height with 15 mm Fine Leveling Adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eWilliam Optics Pier Mount 90\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Pier Mount 90 provides an unshakable imaging platform with a massive 90 kg (198 lbs) loading capacity built upon a 100 mm (4\") diameter aluminum alloy pillar. Weighing only 7 kg and standing at a working height of 89.3 cm, it delivers the stability of a permanent pier with the transportability required for field use, featuring 15 mm of fine leveling adjustment at each foot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 90 kg Payload Capacity in a 7 kg Package\u003c\/h3\u003e\n\u003cp\u003eThe core design achievement of the Pier Mount 90 is its extreme strength-to-weight ratio. The 90 kg (198 lbs) load capacity supports even the largest commercially available telescope systems with dual-scope configurations and heavy imaging trains. At just 7 kg, the pier itself is easily transportable to remote dark-sky sites, eliminating the compromise between stability and portability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 100mm Pillar: Engineering for Zero Flexure\u003c\/h3\u003e\n\u003cp\u003eUnlike tripod legs, which can flex and vibrate independently, the Pier Mount 90's single 100 mm (4\") diameter pillar provides superior torsional rigidity. This design is inherently more stable and damps vibrations faster, a critical factor for long-exposure astrophotography, especially in windy conditions. The aluminum alloy construction ensures that this rigidity is achieved without excessive weight, maintaining field usability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eField-Ready Ergonomics: 89.3 cm Height and 15mm Leveling\u003c\/h3\u003e\n\u003cp\u003eEngineered for practical use, the pier's stance height of 89.3 cm offers a comfortable viewing position for most telescope types while keeping the system's center of gravity low. For setup on uneven terrain, each of the pier's feet includes 15 mm of precise height adjustment, allowing you to achieve a perfectly level platform without shims or guesswork. This ensures accurate polar alignment and tracking from any location.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eZWO AM3\/AM5 Ready with 3\/8\" Adapter\u003c\/h3\u003e\n\u003cp\u003eThe William Optics Pier Mount 90 is optimized for modern, high-performance mounts. It ships with a 3\/8\" thread adapter, making it a perfect drop-in solution for the popular ZWO AM3 and AM5 strain wave mounts. For users with other equatorial mounts, optional adapters are available, ensuring broad compatibility and making the Pier Mount 90 a long-term investment for your astrophotography setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary advantage of the William Optics Pier Mount 90 over a heavy-duty tripod?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main advantage is superior rigidity. The single \u003cstrong\u003e100 mm diameter pillar\u003c\/strong\u003e of the William Optics Pier Mount 90 resists twisting forces and damps vibrations much more effectively than the three separate legs of a tripod. This results in a more stable platform for long-exposure imaging, even with its massive \u003cstrong\u003e90 kg load capacity\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much load can the William Optics Pier Mount 90 handle for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics Pier Mount 90 is rated for a substantial \u003cstrong\u003e90 kg (198 lbs)\u003c\/strong\u003e loading capacity. This is more than sufficient for large reflector or refractor systems, including dual-scope setups with heavy cameras, filter wheels, and guide scopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the William Optics Pier Mount 90 compatible with my ZWO AM5 mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The William Optics Pier Mount 90 includes a \u003cstrong\u003e3\/8\" thread adapter\u003c\/strong\u003e specifically designed for direct compatibility with the ZWO AM5, as well as the AM3. It provides a secure, seamless connection right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the William Optics Pier Mount 90 with mounts other than the ZWO AM3\/AM5?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While it comes standard with an adapter for ZWO mounts, the specification states that adapters for \u003cstrong\u003emore EQ Mount types are optional\u003c\/strong\u003e. You can purchase different adapters to fit a wide variety of equatorial mounts from other manufacturers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow stable is the William Optics Pier Mount 90 for imaging with a large 11\" SCT on a windy night?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics Pier Mount 90 is an excellent choice for this scenario. Its \u003cstrong\u003e100 mm pillar\u003c\/strong\u003e provides exceptional resistance to the kind of low-frequency vibrations caused by wind that can ruin long exposures. With a \u003cstrong\u003e90 kg capacity\u003c\/strong\u003e, an 11\" SCT is well within its stable limits, offering a significant improvement over most field tripods.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI set up on uneven ground. How does the William Optics Pier Mount 90 help with leveling?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics Pier Mount 90 is designed for field use on imperfect surfaces. Each of its feet has a \u003cstrong\u003e15 mm adjustable height range\u003c\/strong\u003e. This allows you to independently raise or lower each foot to achieve a perfectly level platform, which is essential for accurate polar alignment, without needing to carry extra leveling blocks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoading Capacity\u003c\/td\u003e\n\u003ctd\u003e90 kg \/ 198 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eapprox. 7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePillar Diameter\u003c\/td\u003e\n\u003ctd\u003e100 mm \/ 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight (Stance)\u003c\/td\u003e\n\u003ctd\u003e89.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight (Closed)\u003c\/td\u003e\n\u003ctd\u003e79.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFoot Adjustment Range\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Adapter\u003c\/td\u003e\n\u003ctd\u003e3\/8\" Thread (for ZWO AM3\/AM5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Adapters\u003c\/td\u003e\n\u003ctd\u003eAvailable for more EQ Mount types\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eWilliam Optics Pier Mount 90\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e3\/8\" Mount Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":51038607376669,"sku":"WO-YG-PM-90R","price":1078.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/WO-PM-90R-1.jpg?v=1773428944","url":"https:\/\/davidastro.com\/fr-us\/products\/william-optics-pier-mount-90","provider":"David Astro","version":"1.0","type":"link"}