LUNT B1800d1 Blocking-Filter in 1.25 inch zenith mirror diagonal

Spare part for blocking-filters from LUNT SOLAR SYSTEMS, suitable for B400, B500, B600, B1200 and B1800 blocking-filters.The H-alpha telescopes and filter systems from Lunt Solar Systems each include a blocking-filter. The blocking-filters have a blue colored filter part on the side facing the telescope. This blue colored filter parts may become a milky white layer at older blocking-filters if the blocking-filter was storded at high air humidity for some time. Please always store H-alpha telescopes and filters as dry as possible. If this blue colored filter part has become a milky white layer, it can be replaced with this spare part. The replacement is easy and can be done by the user himself. Installation instructions can be found here under the "Manuals" tab as a PDF for download.Please note that this replacement part can only be used on Lunt Solar Systems blocking-filters B400 to B1800. If the problem happens with the large B3400 blocking-filter, the B3400 must be sent to our service department for repair.FEATURESDiameter: 20mmCannot be used separately, only as spare part at blocking-filters from Lunt Solar SystemsFor B400, B500, B600, B1200 and B1800 blocking-filtersIt does not matter if the blocking-filters are installed in 90° zenith-mirrors or straight extension-tubesSCOPE OF DELIVERYSpare part 20mm blue glass for B400 to B1800 blocking-filters

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)

NOTE: This item is a used or returned product. This means: The item may show slight signs of use and the packaging may differ from the original packaging. Please note that refurbished items generally come with a 12-month warranty.With the BRESSER 11-Day 4Cast CV WiFi Weather Station 7-in-1 you’ll never find yourself left out in the cold by the weather again. The weather station, with 7-in-1 solar outdoor sensor, supplements the on-site data with plenty of practical information from the ProWeatherLive platform. A special highlight: the extensive weather forecast, with the outlook for the next 11 days and a detailed overview of the next 24 hours. Information on local visibility and cloud cover also helps passionate amateur meteorologists to keep a close eye on the weather. You’ll always be up to date, whenever and wherever you are – choose to view your data, incl. max./min. values, conveniently on the clear display of the weather station, in the ProWeatherLive app or in a web browser. Environmentally-friendly and user-friendly – weather station with solar sensor Quick to install and connect to the base station, the 7-in-1 wireless sensor reliably supplies data measured directly on site, including temperature, humidity, wind speed, wind direction, precipitation amount, UV level and light intensity. Meanwhile, the power of the sun ensures smooth operation via the large solar panel. The measuring device needs about 4 hours of direct sunlight (100,000 lux) a day. There isn’t much sun around? Simply insert 3 AA batteries as a back-up during installation and they will take care of the power supply. A comfortable indoor climate with the WiFi weather station Outdoors, the weather station puts in a great performance with anemometer and rain gauge as well as thermometer and hygrometer, UV and light sensors. What about the climate indoors? A thermo-hygro sensor has been integrated into the base station so that you can always keep an eye on the indoor temperature and humidity. The trend display, which can be called up directly on the display, is perfect for preventing excessively dry air or mould. Trends you will be able to see include development of the room climate, so that you can respond by introducing fresh air or by humidifying if you need to. In addition, with ProWeatherLife, you can receive notifications when the indoor temperature and humidity change, as well as important weather parameters. Optional extensions for your WiFi weather station Want to adapt your weather station to your needs? No problem! It comes with a range of optional extensions through the following additional sensors (not included): Optional thermo-hygro sensors for indoor climate Optional soil and pool sensors for the garden Optional water detector and lightning sensors Optional PM2.5/10, CO2 and HCHO+VOC sensors for air quality For the perfect extensions, browse our BRESSER accessories to see which additional sensors are compatible (not included). Stay up to date on your local weather and indoor climate easily, whenever and wherever, with the BRESSER 11-Day 4Cast CV WiFi Weather Station 7-in-1. BASE STATION FEATURES Graphic weather forecast for the next 11 days (today and next 10 days)/for 24 hours (now and next 23 hours) from the ProWeatherLife server 11-day forecast for maximum and minimum temperature, as well as average temperature and chance of precipitation from the ProWeatherLife server Local visibility and cloud cover via the ProWeatherLive server WiFi connection for publishing local weather data on ProWeatherLive and up to 2 other weather platforms (e.g. AWEKAS) Indoor temperature (°C/°F) and humidity with trend Displays precise measurement data from the 7-in-1 solar outdoor sensor (Outdoor temperature and humidity, wind speed, wind direction, precipitation, UV level, light intensity) Trend graph for air pressure, precipitation, temperature (indoor/outdoor) or humidity (indoor/outdoor) on the display Weather index (perceived outdoor temperature, dewpoint, windchill factor and heat index) Wind gusts and average wind speed, Beaufort scale (wind speed scale) Sunburn time display Air pressure Set weather notifications via the ProWeatherLive server Maximum/minimum value memory Displays the time, date, day of the week and moon phase Sun/moonrise, sun/moonset Alarm clock with frost alarm WSLink app for easy connection to WiFi and weather platform, weather data calibration and for firmware updates 7 languages for day of the week (EN, DE, FR, ES, IT, NL, RU) Supports additional optional sensors Power supply: Mains plug (included), CR2032 back-up battery (not included) Good to know: The sensor pairs with multiple base stations at once – perfect if you want to keep an eye on conditions in different rooms. FEATURES OF 7-IN-1 OUTDOOR SENSOR Measurement of temperature, humidity, wind speed, wind direction, precipitation quantity, UV level and light intensity Powered via a large movable solar panel In case of insufficient sunlight operation via 3x AA batteries (not included)Range: 150 mSize: 390 x 174 x 465 mm SCOPE OF DELIVERY Base station Solar-powered outdoor sensor Power adapter Instruction manual

NEW - now including a high-quality aperture Solar-filter for safe observation of sunspots, eclipses and planet transits. Great telescope for night and solar observation.The combination of large aperture and short focal length predestine the BRESSER Messier AR-152S for the observation of large celestial objects. Experience the famous globular cluster M 13 in the constellation Hercules: Thousands of pinpoint stars stand before a black sky like so many diamonds spilled onto black velvet. Equipped with nebular filters you can watch the Gulf of Mexico in the North America Nebula and all the other celestial objects that Charles Messier listed in 1781. The compact size of the Messier AR-152S combines outstanding tranportability, high light gathering power and low weight for a telescope of this aperture. The special four lens construction delivers a better perfomance than a classical two lens achromat of this focal length. This telescope is only an optical tube without mount and tripod.FEATURESOptical design: refractor telescopeLens diameter: 152 mm / focal length: 760 mm / F/5Maximum recommended magnification: 254xTelescope for night and solar observationHigh quality BRESSER refractor opticsUniversal telescope for planets, double stars, planetary nebulae and deep-skyExcellent focuser with 2,5" (65 mm) open diameterFour lens construction8x50 straight through viewfinder reticleoptimized finder socket for comfortable useCradle rings with handle and integrated piggyback camera holder (1/4 thread)Smartphone camera adapter for sky navigation includedUniversal 44 mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5)50,8 mm (2") to 31,7 mm (1,25") adapter with integrated T2 thread (T2-adapter ring for your camera is needed)Backfocus: 150 mm behind Hexafoc with attached 2" eyepiece adapterCollimatable lens cellSCOPE OF DELIVERYOptical Tubeaperture solar-filter26 mm Super Plössl eyepiece (31.7 mm / 1.25")31,7 mm (1.25") diagonal mirrorintegrated 31.7 mm and T2 adaptertube rings with universal 44 mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5)handle with camera holderSmartphone adapter for celestial navigation 8x50 Viewfinderastronomy PC software Stellariumrotatable star map