{"product_id":"hubble-optics-ul18-18-inch-premium-ultra-light-dobsonian-telescope","title":"Hubble Optics UL18 18 Inch Premium Ultra Light Dobsonian Telescope","description":"\u003ch2 data-end=\"438\" data-start=\"383\"\u003e\u003cstrong data-end=\"438\" data-start=\"383\"\u003eHubble UL18 – A Lightweight 18\" Dobsonian Telescope\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-end=\"632\" data-start=\"440\"\u003eThe Hubble UL18 is a made-to-order 18-inch Dobsonian telescope, built specifically for serious visual observers who want true observatory-class performance in a portable, transportable design.\u003c\/p\u003e\n\u003cp data-end=\"926\" data-start=\"634\"\u003eWith a massive 18-inch primary mirror, the UL18 gathers over five times more light than an 8-inch telescope, and more than twice the light grasp of a 12-inch, unlocking faint galaxies, delicate nebular structure, and extreme planetary detail that simply isn’t possible with smaller apertures.\u003c\/p\u003e\n\u003ch3 data-end=\"972\" data-start=\"928\"\u003eLight, Strong, and Surprisingly Portable\u003c\/h3\u003e\n\u003cp data-end=\"1235\" data-start=\"974\"\u003eEach UL18 is custom built to order using precision-machined all-metal components. The truss construction uses eight rigid aluminium truss tubes and a folding altitude bearing structure to provide exceptional stiffness while keeping overall weight under control.\u003c\/p\u003e\n\u003cp data-end=\"1522\" data-start=\"1237\"\u003eThe large mirror box design protects the primary mirror during transport, while the modular layout allows the telescope to be broken down quickly for storage or travel. Fully assembled, the UL18 weighs just ~33 kg, making it one of the most portable 18-inch class Dobsonians available.\u003c\/p\u003e\n\u003ch3 data-end=\"1547\" data-start=\"1524\"\u003eOptical Performance\u003c\/h3\u003e\n\u003cp data-end=\"1836\" data-start=\"1549\"\u003eAt the heart of the UL18 is a premium parabolic primary mirror, individually tested and finished to achieve diffraction-limited performance (Strehl 0.95+). The secondary mirror is specified to 1\/10 wave or better, ensuring excellent contrast and pinpoint stellar images across the field.\u003c\/p\u003e\n\u003cp data-end=\"2083\" data-start=\"1838\"\u003eBoth mirrors receive 96% enhanced reflective coatings, maximising light throughput while reducing scatter. This results in brighter deep-sky views, improved low-contrast detail, and excellent planetary performance even at extreme magnifications.\u003c\/p\u003e\n\u003chr data-end=\"2088\" data-start=\"2085\"\u003e\n\u003ch3 data-end=\"2123\" data-start=\"2090\"\u003eChoose Your Telescope Control\u003c\/h3\u003e\n\u003cp data-end=\"2266\" data-start=\"2125\"\u003eThe UL18 can be customised to suit your observing style. You can use it fully manually, or opt for Guided Push-To or Automatic Go-To systems.\u003c\/p\u003e\n\u003cp data-end=\"2534\" data-start=\"2268\"\u003e\u003cstrong data-end=\"2283\" data-start=\"2268\"\u003eManual Mode\u003c\/strong\u003e\u003cbr data-end=\"2286\" data-start=\"2283\"\u003eEven without electronics, the UL18 is a precision Dobsonian with smooth, stable bearings and an easy-to-use truss design. You can enjoy the classic hands-on experience, exploring the night sky exactly as the great visual observers have for decades.\u003c\/p\u003e\n\u003cp data-end=\"2856\" data-start=\"2536\"\u003e\u003cstrong data-end=\"2562\" data-start=\"2536\"\u003eGuided Push-To Version\u003c\/strong\u003e\u003cbr data-end=\"2565\" data-start=\"2562\"\u003eThe UL18 Guided Push-To version features the SkyHub2 digital setting circle system, providing accurate real-time telescope positioning without motorised tracking. High-resolution 8192 PPR encoders on both axes continuously update your telescope’s position in compatible planetarium software.\u003c\/p\u003e\n\u003cul data-end=\"3275\" data-start=\"2858\"\u003e\n\u003cli data-end=\"2985\" data-start=\"2858\"\u003e\n\u003cp data-end=\"2985\" data-start=\"2860\"\u003eAlignment is fast and intuitive using a simple one-star alignment, with optional two-star alignment for increased accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3128\" data-start=\"2986\"\u003e\n\u003cp data-end=\"3128\" data-start=\"2988\"\u003eWorks with SkySafari, Stellarium, Cartes du Ciel, TheSky, and other ASCOM-compatible software on Windows, macOS, Android, and iOS devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3215\" data-start=\"3129\"\u003e\n\u003cp data-end=\"3215\" data-start=\"3131\"\u003eExtremely low power consumption: up to 100 hours from a 15,000 mAh USB power bank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3275\" data-start=\"3216\"\u003e\n\u003cp data-end=\"3275\" data-start=\"3218\"\u003eWiFi and Bluetooth supported (WiFi only for iOS devices).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3560\" data-start=\"3277\"\u003e\u003cstrong data-end=\"3304\" data-start=\"3277\"\u003eAutomatic Go-To Version\u003c\/strong\u003e\u003cbr data-end=\"3307\" data-start=\"3304\"\u003eThe UL18 Go-To version adds fully motorised pointing and tracking for a completely hands-free observing experience. It includes a smart hand controller with a 30,000-object database and supports advanced 1–9 star alignment for precise pointing accuracy.\u003c\/p\u003e\n\u003cul data-end=\"3953\" data-start=\"3562\"\u003e\n\u003cli data-end=\"3666\" data-start=\"3562\"\u003e\n\u003cp data-end=\"3666\" data-start=\"3564\"\u003eBuilt-in encoders and a real-time clock maintain accurate sidereal, lunar, and solar tracking rates.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3806\" data-start=\"3667\"\u003e\n\u003cp data-end=\"3806\" data-start=\"3669\"\u003eControl via WiFi or Bluetooth using SkySafari, Stellarium, or ASCOM\/INDI-compatible software on Windows, macOS, Linux, iOS, or Android.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3953\" data-start=\"3807\"\u003e\n\u003cp data-end=\"3953\" data-start=\"3809\"\u003eAdjustable slew and guide speeds, spiral search, and park\/unpark functionality provide smooth, precise movement for extended observing sessions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"3958\" data-start=\"3955\"\u003e\n\u003ch3 data-end=\"4005\" data-start=\"3960\"\u003eChoosing Your Focal Ratio: f\/4.0 or f\/4.5\u003c\/h3\u003e\n\u003cp data-end=\"4128\" data-start=\"4007\"\u003eThe UL18 is available in f\/4.0 or f\/4.5, allowing you to prioritise either maximum comfort or maximum optical refinement.\u003c\/p\u003e\n\u003cp data-end=\"4153\" data-start=\"4130\"\u003e\u003cstrong data-end=\"4151\" data-start=\"4130\"\u003eWhy choose f\/4.0?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"4334\" data-start=\"4154\"\u003e\n\u003cli data-end=\"4215\" data-start=\"4154\"\u003e\n\u003cp data-end=\"4215\" data-start=\"4156\"\u003eLower eyepiece height – no ladder required for most users\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4247\" data-start=\"4216\"\u003e\n\u003cp data-end=\"4247\" data-start=\"4218\"\u003eMore compact overall system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4276\" data-start=\"4248\"\u003e\n\u003cp data-end=\"4276\" data-start=\"4250\"\u003eWider true field of view\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4334\" data-start=\"4277\"\u003e\n\u003cp data-end=\"4334\" data-start=\"4279\"\u003eIdeal for observers who value comfort and portability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"4359\" data-start=\"4336\"\u003e\u003cstrong data-end=\"4357\" data-start=\"4336\"\u003eWhy choose f\/4.5?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"4557\" data-start=\"4360\"\u003e\n\u003cli data-end=\"4393\" data-start=\"4360\"\u003e\n\u003cp data-end=\"4393\" data-start=\"4362\"\u003eReduced coma across the field\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4436\" data-start=\"4394\"\u003e\n\u003cp data-end=\"4436\" data-start=\"4396\"\u003eSlightly smaller secondary obstruction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4498\" data-start=\"4437\"\u003e\n\u003cp data-end=\"4498\" data-start=\"4439\"\u003eBetter suited to high-power planetary and lunar observing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4557\" data-start=\"4499\"\u003e\n\u003cp data-end=\"4557\" data-start=\"4501\"\u003ePreferred by observers seeking ultimate optical purity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"4804\" data-start=\"4559\"\u003eBoth versions deliver extraordinary performance. The f\/4.0 favours ergonomic comfort and wide-field observing, while the f\/4.5 favours optical cleanliness and contrast. The choice ultimately comes down to observing style and personal preference.\u003c\/p\u003e\n\u003chr data-end=\"4809\" data-start=\"4806\"\u003e\n\u003ch3 data-end=\"4835\" data-start=\"4811\"\u003eSpecifications (UL18)\u003c\/h3\u003e\n\u003cstyle\u003e\n  .spec-table { width: 100%; border-collapse: collapse; }\n  .spec-table th, .spec-table td {\n    padding: 10px 12px;\n    border-bottom: 1px solid #e5e5e5;\n    vertical-align: top;\n    white-space: normal;\n    word-break: break-word;\n    overflow-wrap: anywhere;\n  }\n  .spec-table th { width: 40%; text-align: left; font-weight: 600; }\n  .spec-table td { width: calc(100% - 40%); }\n  .spec-title { margin: 0 0 10px; font-weight: 700; }\n\u003c\/style\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical design\u003c\/th\u003e\n\u003ctd\u003eReflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical diameter\u003c\/th\u003e\n\u003ctd\u003e18\" (457.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal length\u003c\/th\u003e\n\u003ctd\u003e~1860 mm (f\/4.0)\u003cbr\u003e~2058 mm (f\/4.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal ratio\u003c\/th\u003e\n\u003ctd\u003ef\/4.0, f\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEyepiece height at zenith\u003c\/th\u003e\n\u003ctd\u003e~1730 mm (f\/4.0)\u003cbr\u003e~1930 mm (f\/4.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptics type\u003c\/th\u003e\n\u003ctd\u003eParabolic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEyepieces\u003c\/th\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical quality\u003c\/th\u003e\n\u003ctd\u003eDiffraction limited++ (Strehl 0.95+ primary\u003cbr\u003e1\/10 λ PV secondary)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinder scope\u003c\/th\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocuser\u003c\/th\u003e\n\u003ctd\u003e2\" dual-speed linear bearing Crayford (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecondary mirror\u003c\/th\u003e\n\u003ctd\u003e90 mm (f\/4.0), 80 mm (f\/4.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecondary mirror obstruction by diameter\u003c\/th\u003e\n\u003ctd\u003e19.7% (f\/4.0), 17.2% (f\/4.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecondary mirror obstruction by area\u003c\/th\u003e\n\u003ctd\u003e3.9% (f\/4.0), 3.0% (f\/4.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMirror coatings \/ over-coatings\u003c\/th\u003e\n\u003ctd\u003e96% Enhanced coating on primary and secondary mirrors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube material\u003c\/th\u003e\n\u003ctd\u003e6063-T6 Aluminium Alloy tubes with black zinc-plated steel knob screws\u003cbr\u003ealuminium alloy main structure (OTA and mount) and steel mirror cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength of optical tube\u003c\/th\u003e\n\u003ctd\u003e~1830 mm (f\/4.0)\u003cbr\u003e~2010 mm (f\/4.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight, optical tube\u003c\/th\u003e\n\u003ctd\u003e~28 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight, fully assembled\u003c\/th\u003e\n\u003ctd\u003e~33 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDawes Limit\u003c\/th\u003e\n\u003ctd\u003e0.25″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRayleigh Limit\u003c\/th\u003e\n\u003ctd\u003e0.30″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLimiting Magnitude\u003c\/th\u003e\n\u003ctd\u003e15.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Magnification\u003c\/th\u003e\n\u003ctd\u003e900×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdditional \/ optional accessories\u003c\/th\u003e\n\u003ctd\u003e8×50 Finder\u003cbr\u003eTube Shroud\u003cbr\u003eWheelbarrow handles\u003cbr\u003eVinyl foam cushioned grips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOther features\u003c\/th\u003e\n\u003ctd\u003eSling lateral support and deluxe push-pull brass knob collimation screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Hubble Optics","offers":[{"title":"f\/4.5 \/ Manual","offer_id":44568181211205,"sku":null,"price":8090.0,"currency_code":"AUD","in_stock":true},{"title":"f\/4.5 \/ Guided Push-To","offer_id":44568181243973,"sku":null,"price":8590.0,"currency_code":"AUD","in_stock":true},{"title":"f\/4.5 \/ Automatic Go-To","offer_id":44568181276741,"sku":null,"price":11490.0,"currency_code":"AUD","in_stock":true},{"title":"f\/4.0 \/ Manual","offer_id":44568181112901,"sku":null,"price":8890.0,"currency_code":"AUD","in_stock":true},{"title":"f\/4.0 \/ Guided Push-To","offer_id":44568181145669,"sku":null,"price":9390.0,"currency_code":"AUD","in_stock":true},{"title":"f\/4.0 \/ Automatic Go-To","offer_id":44568181178437,"sku":null,"price":12290.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/Untitleddesign_39_3e4bf0ab-2a13-4b9d-ad3e-d421376b9783.jpg?v=1769130585","url":"https:\/\/bintel.com.au\/products\/hubble-optics-ul18-18-inch-premium-ultra-light-dobsonian-telescope","provider":"The Binocular and Telescope Shop","version":"1.0","type":"link"}