LUNT O-ring 34mm for Pressure-Tuner at MT & THa solar telescopes

Spare part for Pressure-Tuner of MT and THa series H-alpha solar telescopes from LUNT SOLAR SYSTEMSTwo rubber O-rings are installed into the Pressure-Tuner of Lunt Solar Systems solar telescopes to seal the air-pressure tuning system. Over time, the rubber of this O-rings can age and become porous, whereby the air-pressure can then no longer be maintained. When this happens, a old O-ring can be replaced by this spare part. The replacement is simple and can be done by the user. Installation instructions can be found here under the tab "Manuals" as a PDF file for download.Please be sure to note:Depending on the production series, the diameters of the Pressure-Tuner pistons can vary slightly. There are pistons for O-rings with 32mm inner diameter and 40mm outer diameter, and pistons for O-rings with 34mm inner diameter and 42mm outer diameter. Please check the diameter of your old O-rings, this spare part is an O-ring with 32mm inner diameter and 40mm outer diameter.If you need the larger O-ring with 34mm inner diameter and 42mm outer diameter, this is the spare part with item number 0558340.The LS50THa telescopes have Pressure-Tuners with smaller diameters, for these you will need replacement O-rings with item number 0558320.After replacing a O-ring, the piston and cylinder of the Pressure-Tuner can be re-greased with grease available under item number 0558350.FEATURESInner diameter: 32mmOuter diameter: 40mmCannot be used separately, only as a replacement part on the Pressure-Tuner of MT and THa telescopes from Lunt Solar Systems.It does not matter what blocking-filter is at the MT or THa telescope.SCOPE OF DELIVERYSpare part one O-ring with 32mm inner diameter and 40mm outer diameter for Pressure-Tuner of MT and THa H-alpha solar telescopes from Lunt Solar Systems

​Spare part for Pressure-Tuner of LS50THa H-alpha solar telescopes from LUNT SOLAR SYSTEMSA rubber O-ring is installed into the Pressure-Tuner of Lunt Solar Systems LS50THa solar telescopes to seal the air-pressure tuning system. Over time, the rubber of this O-ring can age and become porous, whereby the air-pressure can then no longer be maintained. When this happens, the old O-ring can be replaced by this spare part. The replacement is simple and can be done by the user. Installation instructions can be found here under the tab "Manuals" as a PDF for download.After replacing the O-ring, the piston and cylinder of the Pressure-Tuner can be re-greased with grease available under part number 0558350.Please note that this spare part can only be used on the Lunt Solar Systems LS50THa H-alpha solar telescopes. If the problem occurs on the larger THa or MT series telescopes, the larger O-rings with part numbers 0558330 or 0558340 must be used there.FEATURESInner-diameter: 31mmOuter-diameter: 39mmCannot be used separately, only as a replacement part on the Pressure-Tuner of the LS50THa telescopes from Lunt Solar Systems.It does not matter what blocking filter is at the LS50THaSCOPE OF DELIVERYSpare part one O-ring for pressure tuner of LS50THa

Vixen has developed a new generation of SX mounts with Wifi for demanding observers and astrophotographers. The SXP2WL mount is easily operated via a Wifi module using a smartphone or tablet. For user-friendly control of the mount, the free STAR BOOK Wireless app is available. This allows you to use practical celestial navigation functions such as automatic GoTo slewing to certain celestial objects easily via your smartphone or tablet. Since the power consumption of the traditional LCD screen (STAR BOOK TEN) is eliminated, the power consumption of the mount is reduced by up to 20%. This enables astronomical observations and astrophotography over longer periods.By selecting the desired celestial object from a list, it will automatically slew into the telescope's field of view and tracking begins. A previously existing STAR BOOK TEN controller can also be used with this mount without any issues. Equipped with the same precision stepper motors as the top model, the AXD mount, the SXP2WL sets a new standard in performance and precision in the Vixen mount family.The axis cross of the SXP2 mount has a photographic payload of 17 kg and weighs just 13.3 kg, making it ideal for mobile observations. Additionally, the motors located in the lower part of the mount serve as counterweights. As a result, the mount requires fewer weights for balancing.On the SXP2 mount, larger ball bearings are used than in previous models to increase accuracy and payload capacity. The mount housing also features a greater material thickness. To make the polar block even more stable, the axis cross is firmly clamped into a fork. The SXP2 mount in detail Stronger mount housingOn the SXP2 mount, larger ball bearings are used than in previous models to increase accuracy and payload capacity. The mount housing also features greater material thickness. To make the polar block even more stable, the axis cross is firmly clamped into a fork. Very precise tracking with P-PEC functionThe SXP2 mount is delivered with the modern STAR BOOK TEN controller. It offers you the P-PEC function for particularly precise tracking. The term 'PEC' stands for 'Periodic Error Correction.' The system corrects mechanical errors that cause periodic errors in the gear systems. The SXP2 equatorial mount provides a P-PEC function derived from the PEC function. The P-PEC function saves your correction records even after the mount's power is turned off. This means you don’t have to re-enter the data each time, allowing for faster operation and more accurate tracking. Quiet belt drive system with minimal play In conventional motor drive systems of equatorial mounts, gears are used, which are driven by the motor. However, this design has the disadvantage that a certain amount of play occurs between the gears. To avoid the inaccuracies caused by this, the SXP2 mount uses a belt drive system. This significantly reduces both gear play and drive noise. In addition, the device responds more quickly when corrections need to be made. 16 bearings The mechanical parts of the SXP2 mount contain a total of 16 bearings. A set of tapered roller bearings is used for the RA axis to provide more stability for more precise tracking. Stable altitude block for alignment The SXP2 mount uses the same fork as the heavier AXJ mount. This new construction enables quick and stable latitude adjustment. Simple and precise polar alignment via reference stars The 6x20 polar finder is already pre-installed. This allows you to adjust the polar alignment (for both the northern and southern hemispheres). The polar finder offers a variable illuminated reticle with an automatic shut-off function. The brightness can be adjusted in 8 steps, allowing you to tailor it to your individual needs. Additionally, the polar finder is equipped with direct alignment using three reference stars and can achieve an accuracy of up to 3 arc minutes. Variable mount head The mount head has a diameter of 35 mm and eight threaded holes for M8 screws, arranged at 45-degree intervals. An optional accessory plate can be attached directly or in combination with an optional mounting block for dovetail plates. Additionally, the threaded holes on the mount head allow the use of mounting rails from other manufacturers. ATTENTION: For mounting Vixen standard dovetail rails, the X000266 adapter is also required. Combination of innovative, elegant design and user-friendly operation The stable, rigid mount body with very precise tracking has been further optimised by the P-PEC function. This makes the SXP2 a highly precise and easy-to-use mount that will delight every astrophotographer and observer. Special motor placement for fewer counterweights The heavy RA and DEC motor units are housed in the lower part of the declination, so the centre of gravity of the axis cross lies beneath the RA and DEC axes. As a result, the declination body acts as a counterweight. The flat mount head also allows the mount to be balanced with significantly fewer counterweights. Retractable counterweight bar The counterweight bar is made of solid stainless steel and has a diameter of 20 mm. It can be used with all counterweights from the SX and GP mount series. The counterweight bar is housed in the declination body. Accessory shoe For simple and quick polar alignment, the #35511 Polar Meter can be slid onto this shoe. Latitude adjustment The latitude can be adjusted between 0 and 70 degrees (divided into 3 zones and adjustable +/- 15 degrees per zone, for high, medium, and low latitudes).The Vixen Wifi adapter in detail The Vixen Wifi adapter for EQ mounts allows you to control your Vixen mount via a smartphone or tablet. With the free STAR BOOK Wireless smartphone app, you can navigate the sky without any cables. The app transforms your mobile device into a controller for the equatorial mount in no time. The response delay of the mount, often considered the greatest disadvantage of wireless connections, has been reduced to a level comparable with wired solutions. Reduced power consumption compared to conventional controllers with LCD monitors The power consumption of the mount is reduced by up to 20%, allowing for longer observations compared to traditional wired controllers such as the STAR BOOK TEN. Operation similar to the STAR BOOK TEN controller The STAR BOOK Wireless app is structured similarly to the STAR BOOK TEN controller. Depending on the star chart settings, it contains up to 259,000 celestial objects. Simply tap on a celestial object from the object list to start GoTo. The mount will automatically move to the target and place it in the telescope's field of view. All the popular features of the STAR BOOK TEN remain available to you. Comfortable operation While looking through the telescope, you can control the mount by swiping on the star map in the app. Since there are no buttons, you simply glide your finger over the star map to comfortably operate the mount. Extensive astronomical data included This includes data for well-observed celestial bodies such as Messier objects, NGC objects, IC objects, as well as the Sun, Moon, planets, comets, and dwarf planets. High-precision alignment By aligning with one or two stars, you already achieve quite accurate positioning of the mount. Aligning with three or more stars allows for high-precision alignment of the mount, suitable for high magnifications. The objects will then be approached exactly and centered in the telescope's field of view. The alignment information is saved and can be retained even when the device is turned off. By leaving the telescope in its current state after an observation, without moving it, you can start the next observation with the same settings through automatic installation. Custom settings The app offers various custom settings, as in the STAR BOOK TEN controller, such as gear backlash compensation, night mode in red, autoguider, and variable GoTo speed and LED brightness. You can also set the time for the reversal of the telescope tube (Meridian Flip) as desired. Even if the object moves south during tracking, you can prevent the telescope tube from flipping over.Important information Not usable with old SX mounts that use the old blue Star Book. Technical information about the Wifi module 32-bit CISC processor with 120 MHz The unit is connected to the mount via a D-SUB 9-pin connector, as with the STAR BOOK TEN. It features a 6-pin, 6-wire modular plug for external autoguider operation. Supported operating systems: Android 6 or higher, iOS 9.0 or higher, Wifi standard: IEEE 802.11b/g/nFEATURESRA worm gear: 73.2 mm Ø, brass gear with 180 teethDEC worm gear: 73.2 mm Ø, brass gear with 180 teethWorm shaft: 9 mm Ø, brassRA & DEC axis: 40 mm Ø, carbon steel bearings, 16 bearingsCounterweight shaft: 20 mm Ø RAPolar finder: PF-LII 6x20 mmStepper motors: 250 PPS speed, max. 1000x sidereal rateMax load: 17 kg photographic without counterweightPower connection: DC12 V 0.45~2.2 ADimensions: 386 x 419 x 128 mmAxis cross weight: 13.3 kg without counterweightCounterweights: 3.7 kg, 1.9 kgSCOPE OF DELIVERYSXP2WL mountWifi module2 counterweights: 1.9 kg and 3.7 kgMounting toolPolar finder PFL-IICigarette lighter cable

The Complete Guide to the European Total Eclipses on 12 August 2026 & 2 August 2027 Two spectacular celestial events are heading our way – and you'll want to be ready! On 12 August 2026, a total solar eclipse will plunge the skies over Spain, Iceland and Greenland into darkness; then, just a year later on 2 August 2027, the next extraordinary spectacle unfolds over southern Spain and North Africa. Even beyond the path of totality, there's plenty to see: a partial solar eclipse will be visible across much of Europe – with the UK, for example, enjoying an impressive coverage of around 90% in 2026, and still around 40% in 2027. This authoritative guide by NASA astrophysicist Fred Espenak – better known as "Mr. Eclipse" – and Patricia Totten Espenak gives you everything you need to make the most of both events: The science & history of solar eclipses Fascinating facts the whole family will enjoy Practical tips for observing safelyMaps, diagrams and timetablesFull coverage of the total and partial eclipses across Europe, Iceland and Africaand much more... Includes: 3 certified BRESSER Solar Eclipse Glasses for complete peace of mindAlso in the box are 3 BRESSER Solar Eclipse Glasses, so you can sit back and enjoy the view! The high-quality white-light filter film blocks harmful UV and IR radiation, whilst delivering a natural, bright yellow image of the Sun. Robust and ready to use straight away, the glasses are fully reusable and meet the international safety standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories – so you can observe in complete safety. Everything you need to know about two of the most breathtaking astronomical events of our time – written by two experts who have witnessed over 50 solar eclipses between them, and complete with the eye protection you need for every unforgettable moment. FEATURES BOOKFascinating facts about the phenomenon of solar eclipses Detailed information on both upcoming eclipses in 2026 and 2027 Packed with colour photographs, clear graphics and maps Language: English Authors: Fred Espenak, Patricia Totten Espenak 50 pages FEATURES SOLAR ECLIPSE GLASSESSpecialist glasses designed for safe solar eclipse viewing Delivers a natural, bright yellow image of the Sun Perfect for safe visual observation of the Sun Highly resistant to damage Ready to use straight out of the box Meets the eye and face protection standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories SCOPE OF DELIVERY1x Book "Get Eglipsed"3x Solar eclipse glasses

​The EXPLORE SCIENTIFIC Hybrid Finder Scope Base is designed to accept all legacy EXPLORE SCIENTIFIC and BRESSER Messier finder scope brackets and mini dovetail-type (e.g. Vixen, Synta, and many other brands) finder scope brackets. The base has rugged all-metal parts with black-anodized base and chrome-plated metal screws. Safety stops prevent the finder scope from sliding through and from falling when attaching screws are loosened. There are threaded holes on the left and right sides of the EXPLORE SCIENTIFIC Hybrid Finder Scope Base for desired access to attaching screws. Includes bolts and screws for mounting the base to the optical tube assembly. Direct replacement for all EXPLORE SCIENTIFIC and BRESSER Messier telescopes, allowing the use of a wide range of other-brand finder scope options.FEATURESDirect replacement for all EXPLORE SCIENTIFIC and BRESSER Messier telescopesAccepts all legacy EXPLORE SCIENTIFIC and BRESSER Messier finder scope bracketsAccepts also mini dovetail-type fittings from e.g. Vixen, Synta and many other manufacturersRugged all-metal parts with black-anodized baseIntegrated safety stopsIncludes bolts and screws for mounting the baseBolt hole spacing 32.5mm for mounting on telescope tubeSuitable for screw diameter M4/M5 SCOPE OF DELIEVERYHybrid Finder Scope BaseBolts and screws for mounting

Adapter T2 to 2", takes for example 2" eyepieces to Lunt Solar Systems blocking-filters.This adapter offers a T2 female thread at the telescope-side, and a 2" connection at the eyepiece-side.For example you want to use your 2" eyepieces at Lunt Solar Systems telescopes or filters? All you need is this adapter. Simply remove the 1.25" eyepiece tube from your blocking-filter, and thread on this 2" adapter. It takes T2 threading to a 2" eyepiece tube.You can use 2" eyepieces with this adapter at:• LUNT H-alpha telescopes (not at LS35THa!)• the blocking-filters of LUNT H-alpha filter systems• LUNT Ca-K modules• all telescopes/adapter with T2 male threadTechnical data:• Thread at telescope-side: T2 female thread• Eyepiece connection: 2"Delivered by order:• Adapter T2 to 2"(Blocking Filter not included)