EXPLORE SCIENTIFIC Ultra Light Dobsonian 305mm GENERATION II (Refurbished)

Ultra Light Dobsonian 305mm GENERATION II - with completely redesigned and improved construction.No telescope type has influenced amateur astronomy as radically as the dobsonian telescope. Before the introduction of this telescope type by John Dobson the vast majority of amateur telescopes were small inadequate refractors on shaky mounts - just good enough to show the polar regions on mars or the rings of Saturn. Bigger telescopes, like the Schmidt-Cassegrain telescopes, were restricted to the relatively small group of amateurs that could afford them.The brilliant combination of simple - but effective - mechanics and the largest aperture available led to a worldwide triumph of this concept. No other telescope type offers you so much light for your money as a good dobson. We have taken the motto "held together by gravity and driven by yoghurt power" and offer a modern version of the classic - designed by amateur astronomers for amateur astronomers. Despite its large aperture the telescope can be transported easily even in small cars and is assembled within minutes without tools. The construction was optimized for maximum rigidity with a minimum of mass. The combination of big altitude wheels and a optimized aluminium-sandwich construction allows for small movements even at high magnifications. The focus position is already positioned to accept our coma-corrector. The ideal workhorse for the deep-sky enthusiast. A telescope with 305mm aperture gathers more than 1800-times more light than the naked eye. Details on planetary surfaces stand out even to unexperienced observers, and countless deep-sky objects show details. Bright globular clusters are resolved down to the core and the view of the lunar terminator will provide a unforgettable experience.Dimensions for mobile use: Rockerbox 450mmx450mmx320mm; Mirrorbox 380mmx380mmx300mm; Trusses approx. 980mmEyepiece Height while pointing at zenith approximately 1,4m.12“ Net total weight: 32,1 kg; 12“ Mirror Box: 18,9 kg; 12“ Secondary cage +Rockerbox: 10 kg; 12“ 4 Pairs of trusses: 1,8kg; 12“ Altitude Wheels: 1,4kg ; Focuser thread: M54 x 0.75 mm ; Backfocus: 45mm behind the 2" eyepiece holder. 35mm when the 1.25" adapter is mountedSPECIFICATIONS Truss-Dobsonian Telescope in full Aluminium constructionNEW: Slider bearings made from TEFLON und GFK for smooth and precise movementNEW: Improved main mirror cell with completely redesigned mechanicsNEW: Altitude bearings with new designed brake and friction systemNEW: Larger feet to improve stabilityNEW: Universal finder slot to enable an easy finder upgradeNEW: Counter-weight system included - 2 x 1.0 kg NEW: Quick-lock fasteners with new springloaded design for comfortable useNEW: Powder-coated yellow altitude wheels to improve durabilityNEW: Laser engraved central mark on main mirrorSCOPE OF DELIVERYTruss Dobsonian TelescopeLED finder with standard finder slotStray light shield for secondary cageMain mirror collimation toolBattery compartment with bag for fansCounter-weights 2 x 1.0 kgExtension tube for focuserReducer 2"/1.25"Manual

Ultra Light Dobsonian 406mm GENERATION II - with completely redesigned and improved construction. No telescope type has influenced amateur astronomy as radically as the dobsonian telescope. Before the introduction of this telescope type by John Dobson the vast majority of amateur telescopes were small inadequate refractors on shaky mounts - just good enough to show the polar regions on mars or the rings of Saturn. Bigger telescopes, like the Schmidt-Cassegrain telescopes, were restricted to the relatively small group of amateurs that could afford them.The brilliant combination of simple - but effective - mechanics and the largest aperture available led to a worldwide triumph of this concept. No other telescope type offers you so much light for your money as a good dobson. We have taken the motto "held together by gravity and driven by yoghurt power" and offer a modern version of the classic - designed by amateur astronomers for amateur astronomers. Despite its large aperture the telescope can be transported easily even in small cars and is assembled within minutes without tools. The construction was optimized for maximum rigidity with a minimum of mass. The combination of big altitude wheels and a optimized aluminium-sandwich construction allows for small movements even at high magnifications. The focus position is already positioned to accept our coma-corrector. The ideal workhorse for the deep-sky enthusiast. A telescope with 406mm aperture gathers more than 3300-times more light than the naked eye. Details on planetary surfaces stand out even to unexperienced observers, and countless deep-sky objects show details. Bright globular clusters are resolved down to the core and the view of the lunar terminator will provide a unforgettable experience. Dimensions for mobile use: Rockerbox 550mmx550mmx330mm; Mirrorbox 480mmx480mmx300mm; Trusses approx. 1250mm Eyepiece Height while pointing at zenith approximately 1,63m. 16“ Total net weight: 38,4 kg; 16“ Mirror Box: 23,8kg; 16“ Secondary Cage + Rockerbox: 10,5 kg; 16“ 4 Truss pairs: 2,5kg; 16“ Altitude Wheels: 1,6kg ; Focuser thread: M54 x 0.75 mm ; Backfocus: 45mm behind the 2" eyepiece holder. 35mm when the 1.25" adapter is mounted SPECIFICATIONS Truss-Dobsonian Telescope in full Aluminium construction NEW: Slider bearings made from TEFLON und GFK for smooth and precise movement NEW: Improved main mirror cell with completely redesigned mechanics NEW: Altitude bearings with new designed brake and friction system NEW: Larger feet to improve stability NEW: Universal finder slot to enable an easy finder upgrade NEW: Counter-weight system included - 2 x 1.0 kg NEW: Quick-lock fasteners with new springloaded design for comfortable use NEW: Powder-coated yellow altitude wheels to improve durability NEW: Laser engraved central mark on main mirror SCOPE OF DELIVERYTruss Dobsonian TelescopeLED finder with standard finder slotStray light shield for secondary cageMain mirror collimation toolBattery compartment with bag for fansCounter-weights 2 x 1.0 kg Extension tube for focuserReducer 2"/1.25"Manual

Portable power storage (mobile power bank) in maxi format by BRESSER The energy you need in every situation: that's what the mobile Power Station 500 Watt by BRESSER offers you. Whether for tough outdoor use, van life, in the garden or the event of a power failure at home - with the various connection options, you can operate and charge almost all common electronic devices via the powerful and recharcheable 520Wh lithium-ion battery. Perfect for notebooks, musical instrument, etc.: The high-quality 230 volt 500 watt output with a pure sinus wave also supplies sensitive devices with power. In addition, this mobile power station is a silent and environmentally friendly alternative to power generators with combustion engines. In combination with a solar panel (available as an option), the built-in solar charge controller allows you to easily use the sunshine to directly charge your Power Station. The built-in Anderson input for direct charging via solar panel makes this particularly easy. Connection options Charge up to 4 x USB mobile devices such as smartphones, MP-3 players, mobile game paddles, cameras, drones, etc. at the same time. The device offers 1 x USB-A and 1 x USB-C fast charging output with Qualcomm Quick Charge 3.0 support. You can also power up to 5 x 12 volt devices with a total of 10 amps of current draw. Use 1 direct car cigarette lighter connector socket and 4 x DC 2.1/5.5mm connector sockets. With the 2 included adapters from 5.5/2.1mm hollow plug to cigarette lighter socket, you can connect car/camping devices such as refrigerators, water pumps, mini compressors, air pumps etc. directly and in parallel. In addition, 2 sockets with 230 volts and a total of 500 watts continuous power are available on the unit. Ideal for connecting chargers for notebooks/tablets/smartphones, mobile coolers and refrigerators, musical instruments, etc. or other electrical devices in this power class. The heart of the Power Station: the built-in battery The powerful 520Wh 43Ah/12Volt (140400mA/3.7V) lithium-ion battery reliably stores your energy reserve. It is charged within 8 hours with the included 230V charger or 12V car battery charging cable. Thanks to the built-in solar charge controller, you can also charge the Power Station directly using a solar panel (available as an option). A clear display shows you all relevant information such as the battery charge status, battery charging process, USB output ON/OFF and AC/DC output ON/OFF. Possible operating time with typical applicationsHow long does the Power Station charge or operate your devices? You can easily calculate the approximate operating time yourself: runtime (approx.) = Power Station 520 watt-hour battery x 0.85 / devices input power in watts.For example a notebook with 45 Watt input power: 520 Wh x 0.85 / 45 Watt = runtime in hours; 520 x 0.85 / 45 = 10 hours runtime.LED lamp with 5 Watt: approx. 88 hoursLED lamp with 10 Watt: approx. 44 hoursCamping cooler with 30 Watt: approx. 14 hoursNotebook with 45 Watt: approx. 10 hoursTV with 60 Watt: approx. 7 hoursSmartphone: 50 x chargingTablet computer: 30 x chargingDigital camera: 50 x chargingNotebook: 5 x charging Extensive electronic protection of all current inputs and outputs: The Power Station is protected against short circuit, overvoltage, over- and deep discharge of the battery and against overheating. Please note that for use with our astronomy mounts, such as the EXOS-2 Goto, the adapter cable 4930100 is additionally required. FEATURESPortable energy storage (Power Bank / Power Station)Self-sufficient power supply for outdoor, hobby and professional useCharging and operation of various electrical appliancesOperate or charge up to 11 devices at the same timePure sinus wave for both 230 volt outputsAlso suitable for sensitive devices such as notebooks or musical instrumentsMany connection options and adapters includedEnvironmentally friendly and silent alternative to power generatorsIntegrated solar charge controller for direct charging via solar panelComfortable carrying handle with non-slip rubber coatingPowerful 520Wh 43Ah/12 Volt (140400mA/3.7V) lithium ion battery3 x USB A with each 5-9 Volt 2.1 Ampere) and 1 x USB quick charge output with Qualcomm Quick Charge 3.0 support1 x USB C with 5-12 volts 3.0 amps (for smartphones and tablets of the latest generation)4 x 12 Volt DC out 5.5/2.1mm hollow plug (max. total load 10 Amps, short time 12 A)2 x 230 Volt AC out (500 Watt continuous power, short time 1000 Watt)Indication of battery charge status and USB/DC/AC output on/off staus on displayInput charging socket: 13-22 Volt / 6 Ampere (via power supply or solar panel)Built-in Anderson input for direct charging via solar panelCharging time 0-100% approx. 8 hoursTemperature range: from -10 to +40 degrees CelsiusLifetime/charging cycles: >500 times SCOPE OF DELIVERYPower Station with batteryCharger 230 Volt 6 amps230 Volt power cord for Europe (1 pc.)230 Volt power cord for UK (1 pc.)Car charger 12 VoltAdapter 5.5/2.1mm to cigarette lighter socket (2 pcs.)UK socket adapter for 230V output (2 pcs.)Instruction manual

Bring the spirit of NASA missions into your home with the ISA Space Exploration NASA-themed Dobsonian Telescope 150/1200. Enjoy detailed views of planets, the Moon, double stars, and planetary nebulae. The high-quality Newtonian optics provide clear and colour-true images of these celestial wonders. Plus, with the easy-to-assemble, user-friendly Dobsonian mount, you always have a stable base for your stargazing adventures. See every detail day and night – through this beginner's telescope Experience the craters and ridges of the moon, the reddish glow of Mars, or the breathtaking rings of Saturn up close – this reflecting telescope, with its very long 1,200 mm focal length, makes high magnification for exciting detailed observations particularly easy. The included eyepieces let you admire not only planets but also deep-sky objects like the Orion Nebula at 240x or 48x magnification. A great bonus: with the solar filter, you can safely observe sunspots.WARNING: Never point the telescope at the sun without the solar filter! User-friendly mount for precise observations The Dobsonian mount of the ISA Space Exploration Telescope is perfect for an easy start. The sturdy base scores with simple handling and enables even beginners to make precise and stable observations. Due to the mount’s smooth movements, you can effortlessly track celestial objects and enjoy a steady image, even at high magnifications. Additionally, the rocker box is quickly and easily set up and taken down – ideal for transport. The handy accessory tray keeps everything important always within reach. Comprehensive telescope accessories for versatile use Unpack and start right away: the Dobsonian telescope comes with a wide range of accessories. The optical finder with 6x magnification helps you keep track of the night sky and quickly find your desired objects. With the eyepiece adapter from 31.7 to 50.8 mm, you can expand your observation options and use optional 2-inch eyepieces (not included). Want to take your own snapshots of the Moon, Sun, and more? The smartphone camera holder is perfect for your first steps in astrophotography, allowing you to easily photograph through the eyepiece with your phone. Explore space like NASA and discover the highlights of the universe – with the ISA Space Exploration NASA-themed Dobsonian Telescope 150/1200! FEATURES High-quality reflecting telescope for beginners Mirror diameter: 150 mm / Focal length: 1,200 mm / F/8 Maximum recommended magnification: 300x Telescope for night and solar observation High-quality Newtonian optics Ideal telescope for planets, Moon, double stars, and planetary nebulae Solar observation possible with the included solar filter Stable and smooth 2-inch (50.8 mm) rack-and-pinion focuser Main mirror made of special low-expansion glass Easily adjustable metal tube for balancing Detachable rocker box with accessory tray Optics can also be used on other mounts Various adjustment and locking screws on the mirror cell Viewing height at zenith: approx. 115 cm (suitable for children and teenagers) SCOPE OF DELIVERY Tube with Newtonian optics Dobsonian telescope mount (disassembled for self-assembly) Objective solar filter Optical 6x30 finder 2 eyepieces: 25 mm Super Plössl, 5 mm Plössl (Ø 31.7 mm / 1.25 inch) 1 extension tube, 25 mm for 2-inch focuser 1 eyepiece adapter, diameter 31.7 to 50.8 mm 2 tube rings 2 altitude wheels Smartphone camera holder Instruction manual