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LUNT O-ring for Pressure-Tuner at LS50THa solar telescopes

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FAQ - Frequently Asked Questions

That is normal. Finder scopes are only used to make objects easy to locate. The image orientation does not matter for observation.

  • Alt-azimuth: easy to use, moves horizontally and vertically
  • Equatorial: enables precise tracking of objects with only one axis – ideal for high magnifications and astrophotography

  • Moon: from 30 mm
  • Planets: from 100 mm
  • Deep sky: from 150 mm
Are you a member of an astronomy club? Find out here what your benefits are.
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Product and safety instructions


Manufacturer: 
Bresser GmbH, Gutenbergstraße 2, 46414 Rhede

Contact: 
www.bresser.de


Warning notes
  • Safety instructions: There are certain dangers when observing the sun, regardless of the telescope used. Lunt-Solar-Systems places great emphasis on the safety of their products during manufacture. Your safety is the highest priority, and we ask that you carefully read the telescope manual before beginning solar observation. Please never disassemble the telescope! Never use it if it has been modified or damaged in any way! Always contact our customer service if you have any questions regarding the safety of your instrument. Never look at the sun with an unprotected eye or with a telescope not intended for solar observation! Never leave your telescope unattended while it is pointed at the sun! Other people who are unfamiliar with it might attempt to replace the block filter with another prism, unaware of how critical this filter is for safety. The components of Lunt-Solar-Systems telescopes are not interchangeable with those of other manufacturers. Lunt-Solar-Systems solar telescopes contain several different optical elements that have been precisely adjusted and mounted during manufacture. These systems require no maintenance. Never disassemble the telescope. Doing so will void the warranty, potentially leading to expensive repairs, and may cause future damage to your instrument, compromising your safety! Most Lunt-Solar-Systems telescopes and filters include a very sensitive optical component called an Etalon. These Etalons are built into the system to protect them as best as possible. Countless considerations have been made to ensure the best performance of this "heart" of every system, even under the daily stresses it inevitably faces, such as shocks and vibrations during transport or regular use. Nevertheless, it should never be dropped. Improper use of the telescope can damage the Etalon (not a warranty case) and render the system unusable until repaired. The instrument should always be stored in its original packaging or in the optional transport case (item number 0554010). Like any optical precision instrument, it should be stored in a dry environment. With proper care, you will enjoy your instrument for a lifetime!
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LUNT O-ring 32mm 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

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EXPLORE SCIENTIFIC 3" 0.7x Reducer/corrector
The EXPLORE SCIENTIFIC 3" 0.7x Reducer/corrector, reduces a compatible telescope's focal length by a factor of 0.7x (for around f/8) and 0.8x (for around f/10) respectively. The reducer/corrector not only reduces the focal length but also flattens the field. Although originally developed for the Explore Scientific ED-APOs 127mm and 152mm, the reducer can be used with many systems - for example with the Explore Scientific ED-APOs 102mm and 165mm (please note, this will not work on the Explore Scientific 80mm ED Apo refractors though). With certain telescope focal lengths, a slight restriction of the correction at the edge of the image field can be expected when using full-frame sensors. This unit comes with 3" barrel adaptor for direct focuser thread M54x0.75 (the standard focuser thread of the Explore Scientific Essential series of ED Apos) and T2 camera adaptor. This reducer/corrector features a free aperture of 65mm, so that it can be used even with cameras that have a large sensor - if the telescope allows for this. Note: As previously mentioned, this Reducer/corrector comes with a screw on ring, which fits the standard focuser thread of the Explore Scientific Essential series of ED Apos. For telescopes which are equipped with the 2.5" HEX Focuser, the optional screw-on adapter part no: 0510366 is needed. Other telescopes, not in the Explore Scientific range, with standard 2" push-fit focusers will need the Explore Scientific 2" Adaptor for 3" Corrector - part no: 0510364 to get this reducer correctly fitted. SPECIFICATIONS Reduces the focal length by 0.7x at f/8 Flattens the field for astrophotography Developed for ED127 und ED152 APO telescopes Also fits Explore Scientific ED102 and ED165 telescopes - and others Free aperture: 65mm Inner thread for telescope adaption: M76x0.75mm Outer thread for camera adaption: M72x0.75mm 3" focuser barrel adaptor included Adaptor for Explore Scientific focuser M54x0.75mm included T2 camera adaptor M42x0.75mm included Diameter: 78.5mm; length: 100mm Length without adaptors: 52mm Weight without adaptors: 530g What's Included Reducer/Flattener 3" focuser barrel adaptor Adaptor for Focuser M54x0.75mm T2 camera adaptor M42x0.75mm Dust caps

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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 34mm inner diameter and 42mm outer diameter.If you need the smaller O-ring with 32mm inner diameter and 40mm outer diameter, this is the spare part with item number 0558330.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: 34mmOuter diameter: 42mmCannot 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 34mm inner diameter and 42mm outer diameter for Pressure-Tuner of MT and THa H-alpha solar telescopes from Lunt Solar Systems

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BRESSER Single Polarizing Filter 2"
Single linear 2" polarizing filter.This polarizing filter can be used for example at the Lunt Solar Systems 2" White-Light Herschel-wedge (0558201).The 2" filter can also be used with the BRESSER microscopes 5804000 and 5806100 for the suppression of reflections (eg on metal components, soldering points). It is connected via the M48 thread.FEATURESLinear polarizing filterFilter mount with 2" filter thread (M48)SCOPE OF DELIVERY1x 2" polarizing filter

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EXPLORE SCIENTIFIC Solarix Solar Filter Film A4
Observe solar eclipses, sunspots, planetary transits, flyovers by aircraft and satellites.For DIY construction of objective filters for smartphone cameras, telescopes, binoculars, photo and video cameras.Newly developed solar filter film with the optical quality of a high-quality glass filter but with the durability of a polymer film.Double protective filter thanks to the polymer carrier material with an additional reflective coating.Produces a very natural bright-yellow solar image.Also suitable for high magnifications.Very uniform brightness distribution.Ideal for visual and photographic use.Very low weight and therefore requires no additional counterweights.Extremely flat surface compared to most other film filters, which very easily develop creases and kinks.Very resistant to damage.Lab tested to DIN EN ISO 12312-2 : 2015-11100% safeTECHNICAL DATAMaterial thickness: 0.05 mmOptical density: 5Optical transmission: 1/1000 of 1% (99.999% reflection of incoming light)Format: A4 - 210 x 297 mmSCOPE OF DELIVERYFilter film, A4 formatInstruction manual

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BRESSER Universal power supply 230/ 5V, 1.0 A EU/UK/US
Universal power supply for Bresser microscopes with 5V connection. Various adapters are included for the EU (Euro plug), Great Britain, USA, Canada, Central America, Japan and China. Suitable for the following microscopes/microscope series, among others:- Junior MikroSet* Serie- Biolux* Serie- LCD-Mikroskop (5201000)- Biolux Touch (5201020)- Science TFM-201 und TFM-301 (5750800 und 5750900)- Science Infinity (5760700)- Researcher ICD LED (5803100)- Science ETD-201 (5806200) If you are not sure whether your microscope is suitable please contact us. *not suitable for devices with battery operation CHARACTERISTICS:Input: 100-240 V - 50/60 HzOutput: 5V / 1000 mAPlug: 5.5 mm outer, 2.1 mm innerPolarity: + in the center, - outside SCOPE OF DELIVERY:Power Supply unit Adapter for EU (Euro plug) Adapter for UK Adapter for USA, Canada, Central America, China and Japan

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