EXPLORE SCIENTIFIC 2" UHC Nebula Filter (Refurbished)

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar system enormously. Depending on the type of the celestial object, it is possible to dramatically increase the contrast by blocking annoying artificial light. The EXPLORE SCIENTIFIC UHC filter "zeros in" on the wavelengths of so-called emission nebulae. Those objects glow in special colours - their emission lines. Those emission lines are linked to chemical elements - in this case hydrogen at 486nm and 656nm, plus oxygen at 496nm and 501nm. The EXPLORE SCIENTIFIC UHC nebula filter blocks all other colour wavelengths (and thereby nearly all of artificial light) and only the emission line of the hydrogen and oxygen can pass the filter. The result is astonishing: suddenly nebulae are visible at locations that were completely invisible from, without filters. In suburban skies, for example the Owl-nebula M97, the Veil-nebula NGC 6992 or even the bright Dumbell-nebula M27 are not clearly visible. Using this filter allows you to see nebulae and their structures in much finer detail. A must for every visual observer. The Explore Scientific nebula filters come with a individual test certificate - your guarantee to receive a premium filter.

Explore Scientific's Sun Catcher Variable Large Aperture Solar Filters are available in many sizes to work on most telescopes from 60mm up to 10-inch Schmidt-Cassegrain and of course all Bresser and Explore Scientific Telescopes. The Solar Filter material being used is the new advanced 'Solarlite' Film manufactured by world famous Thousand Oaks Optical through years of research and development. 'Solarlite' is a new solar film that has the optical quality of glass with the advantages of impregnated polymer. Perfect also for the solar astrophotographer.NOTE: All Explore Scientific Solar Equipment is rated ISO12312-2 supplied by Thousand Oaks Optical and approved for direct observation of the Sun.These solar filters are available in different sizes, the picture above shows three different sizes as an example. This is the solar filter with 114mm filter diameter.SPEZIFICATIONSSpecial objective filter for safe solar observationsISO12312-2 ratedField-stop diameter 114mmFits to outer telescope tube diameter from 110 to 160mmQuick individual match with your telescope diameterFast Setup - Easy UseSCOPE OF DELIVERY1x Sun Catcher solar filter

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar systems enormously. Depending on the type of the celestial object it is possible to increase the contrast dramatically by blocking the annoying artificial light. The EXPLORE SCIENTIFIC UHC filter uses a characteristic property of the so called emission nebulae. Those objects glow in special colours, their emission lines. Those emission lines are linked to chemical elements - in this case hydrogen at 486nm and 656nm, plus oxygen at 496nm and 501nm. The Explore Scientific UHC nebula filter blocks all other colours (and thereby nearly all of the artificial light) and only the emission line of the hydrogen and oxygen can pass the filter. The result is astonishing: suddenly nebulae are visible at locations that were completely empty without filters. In suburban skies for example the Owl-nebula M97, the Veil-nebula NGC6992 or even the bright Dumbell-nebula M27 are not clearly visible. By using this filter you can see the nebulae and their structures without problems. A must for every visual observer. The EXPLORE SCIENTIFIC nebula filters come with a individual test certificate - your guarantee to receive a premium filter.FEATURESenables the observation of emission nebulaeblocks almost the entire artificial lightonly the two emission lines of hydrogen and oxygen passes the filterWHAT'S INCLUDED1x 1.25" UHC nebula filter

Besides air turbulence, the brightening of the night sky is the biggest obstacle to observing faint objects beyond the solar system. Street lamps and other artificial lighting mean that the sky in human settlements is no longer really black. This affects the contrast and thus the perception of deep-sky objects. Depending on the type of celestial object, however, part of disturbing artificial light can be filtered out, making it easier to observe fainter targets.The EXPLORE SCIENTIFIC CITY LIGHT SUPRESSION - or CLS - filter uses the fact that the artificial lighting is not evenly distributed over the entire spectrum. These colours - in the case of the EXPLORE SCIENTIFIC CLS nebula filter, above all the typical colours of mercury and high-pressure lamps, used in street lighting - are suppressed, but the emissions of deep-sky objects are allowed through. With a slightly brightened sky, some relatively bright deep-sky objects are practically invisible with a telescope, for example the large galaxy M101. Using this filter makes observation much easier. A must have for any visual amateur astronomer.  The CLS can also be used as a useful photographic filter - helping to improve the quality of your telescopic deep sky photos.The EXPLORE SCIENTIFIC nebula filters are delivered with an individual test report - so you can be sure of receiving high-quality filters.SPECIFICATIONS:eliminates disturbing light - e.g. from street lightingenables observation of faint deep sky objectsWHAT'S INCLUDED:1x nebula filter

Five extension tubes from 30 to 5mm length with thread connection M48x0,75mm in a set. For adjusting different distances of the camera to the focal plane of the telescope or the corrector/field flattener. There is an M48.0,75 internal and external thread in each individual tube. The M48x0.75 thread is also called large T2 photo thread or 2.0 inch filter thread. Camera specific bayonet adapters or color and nebula filters can be used. Included are 5 different tubes with the steps 30, 20, 15, 10 and 5 mm. The larger free inner diameter of 45.0 mm effectively prevents undesired vignetting of the camera sensor. The outer diameter of the sleeves is exactly 50.65 mm and can therefore be mounted directly in any 2 inch diameter eyepiece adapter. FEATURES Extension sleeves M48x0,75 in set Five extension sleeves: 30, 20, 15, 10, 5 mm Use with correctors and field flatteners Distance adjustment from camera to focal plane Suitable for camera-specific bayonet adapters Also suitable for 2.0 inch colour and nebular filters Internal and external thread M48x0.75 mm (large T2 thread) Large inner diameter of 45.0 mm Outer diameter is 50.65 mm (2 inches) Black matt anodized aluminium Total weight 85 grams SCOPE OF DELIVERY Extension sleeves M48x0.75 (5 pieces)

Diagonals provide a user-friendly observing position for refractors and Cassegrain telescopes. The Explore Scientific 2" Diagonal Mirror here is precision machined from aluminium and contains carbon fibre parts. The large eyepiece port diameter of 2"(50.8mm) is ideal for modern wide angle eyepieces and a non-marring brass compression ring holds the eyepiece in place securely. The dielectric coating of the mirror delivers 99% reflectivity and is very durable against environmental influences. A step-down reducer to 1.25"(31.8mm) is included, so all of your 1.25" eyepieces and accessories can also be used.FEATURES Star diagonal mirror for focuser with 2" barrel High quality flat mirror Dielectrical mirror coating delivers 99% reflectivity Very durable against environmental influences Brass eyepiece clamping ring Housing completely made of metal Dust caps included WHAT'S INCLUDEDdiagonal mirror dust caps

The telescope set, composed of Messier MC-152/2250 optics and EXOS-2 PMC-Eight GoTo mount, offers everything you need for fascinating celestial observations! Thanks to the long 2250 mm focal length, you can enjoy impressive and detailed planetary observations. The tube stands out with its compact Maksutov-Cassegrain design, ensuring optimal portability. With the 150 mm aperture, you can also observe smaller nebulae and distant galaxies in the night sky. The modern mount also impresses with easy sky navigation and precise tracking, thanks to the excellent GoTo control and the user-friendly ExploreStars app. And with the included solar filter, you can make exciting daytime discoveries on the surface of our own star! The Telescope The compact optics define the Messier MC-152. Its short length makes it ideal for mobile use. With the long 2250 mm focal length, you can look forward to exciting planetary observations at high magnifications. The 152 mm aperture allows you to observe smaller nebulae in the vastness of space. Find the remnants of a massive star explosion from 1054 in the constellation Taurus, or trace the glowing filaments of the Great Orion Nebula. Spot the famous Whirlpool Galaxy in the constellation Ursa Major, or find the Dumbbell Nebula in the constellation Vulpecula. Additionally, the high-quality objective solar filter enables safe observations of sunspots, eclipses, and planetary transits. (Caution: Never point the telescope at the sun without the solar filter!) The Mount The EXPLORE SCIENTIFIC EXOS-2 PMC-Eight GoTo mount is equipped with a modern and very precise GoTo control. It features a robust Wi-Fi controller unit that provides all necessary interfaces. The NEMA-11 stepper motors are connected directly to this unit via cable, and an ST-4 compatible autoguider port is also available. The control also supports microstepping for precise tracking. Intuitive operation via app and graphical star chart The dedicated ExploreStars app for the PMC-Eight system impresses with a visually appealing, intuitive user interface. The stars available for alignment during control initialization and all celestial objects in the database are displayed as a star chart with additional text information. All these objects can be conveniently viewed and selected. Powerful controller unit with Open GoTo for customisation The heart of the controller unit consists of a completely autonomous 2-channel multi-processor with 8 CPUs and a Wi-Fi Ethernet 10/100 adapter with IP functionality. This allows remote operation via browser, ASCOM, app, or serial connection. Open GoTo also allows custom firmware to be written and loaded onto the controller unit, enabling individual customisation of device functions and the creation of custom object lists. Polar finder included The pre-installed polar finder scope allows quick and precise polar alignment and long exposure times without unwanted star trails. The integrated LED illumination unit further enhances the usability of the polar finder. FEATURES TELESCOPE Telescope for night and solar observation High-quality BRESSER Maksutov-Cassegrain optics Aperture: 152 mm; Focal length: 2250 mm; F14.8 Ideal for planets, double stars, and planetary nebulae Excellent focuser with a 65 mm diameter Optimised finder bracket for comfortable viewing Handle for easy transport with integrated camera holder (photo thread) Smartphone camera adapter for celestial navigation included Prism rail with stainless steel clamp surface (44 mm universal dovetail for GP/EQ5/LXD75) T2 adapter for DSLR cameras (optional T2 ring required) 50.8 mm to 31.7 mm adapter with integrated T2 adapter (optional T2 ring required) With brass ring clamp FEATURES MOUNT Powerful PMC-8 Open GoTo system User-friendly and graphically appealing ExploreStars OpenGoto app Wi-Fi control via tablet, notebook or desktop PC with at least 7" display and WiFi function (not included) Compatible operating systems: WIN8.1, WIN10/11, iOS or Android 4.4 and above Classic control via directional buttons or joystick for guiding, centring, correcting, and moving via touchscreen Intuitive 2-star and 3-star alignment for GoTo control initialization Multi-processor microcontroller with 8 CPUs (processor cores) NEMA-11 micro-stepper motors High-precision and quiet belt drive ST-4 compatible autoguider port ASCOM driver available, also supports pulse-guiding Ability to create custom firmware and object lists and load them into the PMC-8 GPS compatible / settings depend on the computer or tablet used Power supply via 12-volt DC, with a maximum power consumption of 1.6 amps at full load SCOPE OF DELIVERY Optical tube with Hexafoc focuser Objective solar filter 26 mm Super Plössl eyepiece (31.7 mm / 1.25") Integrated 31.7 mm and T2 adapter Adapter for 50.8 mm (2") eyepieces Tube rings with prism rail with stainless steel clamp surface (44 mm universal dovetail for GP/EQ5/LXD75) Handle and camera holder Smartphone adapter for navigation 6x30 finder scope 90° star diagonal mirror, 31.7 mm (1.25") Astronomy PC software Stellarium (downloadable) Rotatable star map EXOS2-GT mount with Open GoTo PMC-8 Stainless steel tripod with built-in spirit level Counterweight 2 x 4.5 kg Polar finder with illumination unit 12 Volt / 2 Amp power supply ExploreStars app via software download User manual