LUNT Blue-Glass 20mm for B400 to B1800 blocking-filters

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

​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

Spare part for Pressure-Tuner of MT and THa series H-alpha solar telescopes from LUNT SOLAR SYSTEMSFor example, if the O-rings have been changed on a Pressure-Tuner of a Lunt Solar Systems H-alpha solar telescope, the Pressure-Tuner can be re-greased with this grease. The grease can be applied to the piston with the O-rings and to the threads of the brass cylinder on the Pressure-Tuner. It keeps the Pressure-Tuner running smoothly and seals it.Please note:Do not use too much grease inside the brass cylinder. The grease must not get into the air passage at the bottom of the brass cylinder, otherwise the Etalon could be damaged in the worst case.FEATURESLithium grease with Teflon contentVery good sealing propertiesHigh adhesion and good corrosion protectionTemperature stable from -20 to +120° CelsiusConstant viscosity during temperature fluctuationsSCOPE OF DELIVERYSpare part: Grease for Pressure-Tuner of MT and THa H-alpha solar telescopes from Lunt Solar Systems

Observe solar eclipses, sunspots, and airplane flybys in front of the sun safely with these glasses designed for direct solar observation.Manufactured to the same standards of safety typical to the entire family of Lunt Solar Systems products - the premium manufacturer of Solar telescopes and filters.FEATURESproduces a very natural light-yellow sun imageideal for safe visual observation of the sunvery resistant to damage100% safeSCOPE OF DELIVERYSolar eclipse glasses (5 pieces)

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

The three-lens design of the EXPLORE SCIENTIFIC ED-Apochromats provides everything an amateur astronomer desires - at a reasonable price. The construction with Hoya FCD-1 ED glass has two air spaces and provides a level of correction so superior to the two-lens constructions, that are common in this price class, that you will see the difference immediately. This excellent optical performance teams up with a high precision mechanics - the result is a telescope on a level that is setting a new standard in it´s price class. Astrophotographers will love this telescope - a optional field flattner is available and makes the telescope perfect even for cameras with a large chip format.These very popular EXPLORE SCIENTIFIC Triplet ED APO Refractors we do offer in 3 different product lines:Essential Line: HOYA FCD-1 Glass lens, AL-Tube, 2.0" Rack&Pinion Focusser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112084(AL), 0112106(AL), 0112132(AL)), 0112155(CF + 3"FT)) Professional Line: HOYA FCD-100 Glas lens, AL/CF-Tube, 2.5" HEXAFOC Focusser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112086(AL), 0112108(AL), 0112109(CF), 0112134(AL), 0112135(CF))High-End Line: OHARA FPL-53 Glass lens, Carbon(CF) Tube, 3.0" Feather-Touch Focusser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112165(CF))FEATURESthree lens air-spaced ED-apochromatHoya FCD01-ED glasspolystrehl of above 0.9weight: 2,6kgbackfocus: 165mm above 2" adaptorSCOPE OF DELIVERYOptics with dovetail plate and finder slot 2" Star Diagonal 99% reflectivityDust caps for front-lens and focuser

The models of the Traveler series by BRESSER are lightweight tripods, which can also be taken on long hikes and trekking trips. They are equipped with quick-release fasteners on the tripod legs as well as a multifunctional 3-way panoramic head with quick-change plate and water balance. The height can be precisely adjusted using the hand crank on the center axis. For a better carrying comfort there is a handle and on the lower side of the middle axle there is a hook for fastening a counterweight. Suitable for photo and video cameras as well as for lighter spectroscopy. FEATURESSegments: 3Max. Diameter: Ø23mm to Ø30mmMax. Height: 180cmFolded: 71cmWeight: 1660gMax. Load: 2.7-5kg SCOPE OF DELIVERYtripodquick-release platebag

Highly corrected 102mm air-spaced triplet apochromat (with three lenses) and carbon fiber tube and a 2.5" high-precision HEXAFOC focuser.   Apochromats are the ultimate choice in small to medium sized telescopes: the combination of compactness, transportability, very high image contrast and sharpness together with the possibility to make excellent astrophotos cannot be bested. The advances in glass manufacturing during the last few years have made true apochromats available to more astronomy enthusiasts than ever before. The new Explore Scientific FCD-100 CF Hex represents another major improvement in this field - the overall correction (color and spherical) is setting new standards in this price class. The optical design shows a polystrehl value of 0,97 indicating a level of correction that is absolutely top of the line.This excellent apochromat is a very versatile telescope: the fast f-ratio makes short exposure times possible. The high contrast and sharpness of the image provide breathtaking views of large objects like the North america nebula or the Andromeda galaxy as well as tack sharp planetary images. The telescope is lightweight and compact - the dew shield slides down the tube to minimize size for transportation. Revolutionary glass and precision manufacturing created a telescope that offers observing joy on the highest level. This does not only qualify this telescope as the ideal travel scope, it is also the perfect choice for fast observations and for astrophotography. The excellent 2,5" HEXAFOC focuser with 10:1 reduction is perfect for this - the large inner diameter of 65mm prevents vignetting by the focuser when the telescope is used for astrophotography with large sensors. These very popular EXPLORE SCIENTIFIC Triplet ED APO Refractors we do offer in 3 different product lines:Essential Line: HOYA FCD-1 Glass lens, AL-Tube, 2.0" Rack&Pinion Focusser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112084(AL), 0112106(AL), 0112132(AL)), 0112155(CF + 3"FT)) Professional Line: HOYA FCD-100 Glas lens, AL/CF-Tube, 2.5" HEXAFOC Focusser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112086(AL), 0112108(AL), 0112109(CF), 0112134(AL), 0112135(CF))High-End Line: OHARA FPL-53 Glass lens, Carbon(CF) Tube, 3.0" Feather-Touch Focusser with 1:10, 2.0" Star Diagonal 99% Reflectivity (see Part No. 0112165(CF))SPECIFICATIONSAperture: 102mmFocal Length: 714mmFocal ratio: f/7.0Design: Apochromat with three lenses, two air spaces and FCD-100 glassWeigth: 3,3kg , lightweight due to carbon fiber tubeBackfocus: 150mm above 2" adaptorDesign: Apochromat with three lenses, two air spaces and FCD-100 glassSCOPE OF DELIVERYOptical tube with retractable dew-shield2.5" HEX focuser with 1:10 gear reduction  2" Star Diagonal 99% reflectivityTube rings with dovetail plate and handleExtension tubes for focusser (2pcs)Dust caps for front-lens and focuserUniversal finder slot 

A digital microscope easily brings the microcosmos up on the screen. For a long time, these instruments were common only in the beginner's range. Now, the successful and proven Researcher series makes the step into the digital microscopy world and offers new options for microscopy in schools, for hobby or work. The optics and mechanics is the same as already well estabished in the Researcher Bino and Researcher Trino microscopes. Incuding 4 DIN objectives, Abbe condenser, coaxial fine focus and crosstable, the Researcher LCD is suitable for use in the microscopy hobby as well as in teaching or other work related applications. The highest magnification when using the 60x objective (compares to 600x on non digital microscopes) is high enough to view small microorganisms as microalgae, flagellates and bacteria. Other magnifications (20x, 100x oil) can be added later. The Researcher LCD is also compatible with our plan-achromatic objectives designed for 160mm optical tube length.The integrated, modern Sony camerasensor IMX206 with 16MP gives a brilliant image with good contrast on the monitor. The user can change settings and capture images and video conveniently with the touch screen. Images with 16MP and Full HD video can be stored directly on SD card (SD card not supplied). The microscope also has a HDMI connection, so the image is easily shown on a big monitor, TV, beamer or smartboard. The results can be shared with a bigger audience in lectures or teaching. FEATURESDigital microscope with integrated touchscreen 4 achromatic DIN objectives (RMS thread connection), parfocal length 45mm Objective magnifications of 4x, 10x, 40x, 60x (40x and 60x with specimen protection) Abbe condenser with iris diaphragm, fully adjustable and height adjustable High-contrast screen with natural colours, 1024x600px resolution Integrated Sony IMX206 camera sensor with 16MP HDMI port for connection to an external monitor SD card slot (supports up to 32GB, not included) USB port (for data transfer to SD card) SCOPE OF DELIVERYResearcher LCD Digital Microscope Set of 5 prepared slides and 5 blank slides Power adapter (EU) 5V 2A HDMI cable USB cable for transferring stored data to a PC Dust cover

Weather impacts almost every living being on the planet, whether people, plants or animals. The NATIONAL GEOGRAPHIC BaroTemp HZ weather station gives you a comprehensive overview of the outdoor weather conditions, as well as the indoor temperature and humidity. Featuring a monochrome display, a built-in barometer and a reliable weather forecast function, it displays a wide range of weather data. It also comes with numerous other practical functions, such as a built-in alarm and radio-controlled clock. Includes outdoor sensor for taking precise measurements The weather station also comes with a wireless sensor for measuring the outdoor temperature and humidity. Simply place the sensor up to 80 metres from the base station and pair the devices to start monitoring the local conditions. The outdoor sensor also features a built-in display, allowing you to view the readings directly without returning to the base station. Weather forecast function with built-in barometer The weather station comes with a practical weather forecast function, which shows you what the weather has in store via onscreen symbols. You can also view the recent air pressure readings from the built-in barometer. Monitor your indoor climate From your office to your own home, maintaining the right humidity and temperature is essential to your well-being. The weather station features a built-in thermometer and hygrometer, allowing you to monitor the indoor temperature and humidity. In addition to these measurements, it also displays a smiley to indicate whether the air is too dry, too moist or optimal. Radio-controlled clock, alarm and more The weather station also comes with a radio-controlled clock and practical alarm: when the clocks change, the DCF time signal automatically adjusts the time, while the alarm clock features two separate alarm times as well as a snooze function. The built-in display also shows you a range of other useful data, including the sunrise and sunset times, moon phase and current tide. Monitor your local weather, indoor climate and more with the NATIONAL GEOGRAPHIC BaroTemp HZ weather station. BASE STATION FEATURES Weather station with integrated thermometer and hygrometer Measures the indoor temperature and humidity Displays the outdoor temperature and humidity Measures the air pressure and displays recent readings Weather forecast with symbols Indoor comfort indicator Automatically sets the time via DCF radio signal Date and day of the week (choose from seven languages) 2 alarm times and snooze function Moon phase, sunrise and sunset, tide Backlight Supports up to 2 additional thermo-hygro sensors (not included) Battery status indicator for base station and outdoor sensor Battery operated: 3x AAA batteries (not included) OUTDOOR SENSOR FEATURES Wireless thermo-hygro sensor Measures the temperature and humidity Built-in display for viewing measurements Range: up to 80 metres Battery operated: 2x AAA batteries (not included)  Can be placed on a table or wall-mounted PACKAGE CONTENTS 1x Base station 1x Outdoor sensor Instruction manual

The Deluxe carrying case plus the tripod bag in a set - the perfect solution for protecting your expensive equipment.​The Carry Case Deluxe is exactly suitable for BRESSER MESSIER MCX102/127 GoTo telescopes and offers reliable protection for your equipment. This is a high quality version made of aluminium with reinforced steel edges. A sturdy carrying handle and metal fasteners withstand even the toughest outdoor use.Also included is a sturdy and padded transport bag made of nylon for the field tripod plus accessories tray of the BRESSER MESSIER MCX-102/MCX-127 GoTo telescopes. FEATURESsuitable for BRESSER MESSIER MCX102/127 GoTo Telescopescase cut-outs for the telescope and accessorieshigh-quality aluminium case design with reinforced steel edgessturdy metal handles and fasteners on casereliable protection of the telescope and accessoriesDimensions of carry case: 620 x 410 x 290 mmweight of case: 6,7 kg ; color: silversturdy and padded nylon tripod transport bagprotects the tripod plus accessory tray during transportfor BRESSER MESSIER MCX102/127 telescope tripodswide shoulder strap with quick-release fasteners includeddimensions of softbag: 700 x 300 x 300 mmweight of softbag: 0,5 kg ; colour: light-greenSCOPE OF DELIVERYtransport case Deluxe (1 piece)transport bag (1 piece)