BRESSER Messier AR-102s/600 Hexafoc OTA (Refurbished)

Universal dovetail clamp suitable for all optical tubes which are equipped with a standard 44mm dovetail rail (Messier/ES/GP/Vixen).  Also a screw kit is included for mounting the dovetail clamp direct on the top of the handle of all BRESSER Messier und EXPLORE-SCIENTIFIC telescopes. Thus a parallel mounted guiding telescope can be set up very easy and enables long exposure astrophotagraphy with autoguiding.  The prism clamp has 2 x 6mm countersunk holes (35mm hole spacing) and 3 additional 1/4" photo tapped holes at 120 degrees angular distance on a pitch circle diameter of 55 mm to allow a versatile adaptation to a variety of other telescopes and adapter plates.FEATURESUniversal dovetail clamp  Suitable for 44mm dovetail rail of Messier/ES/GP/Vixen  Screw set for Messier/ES handle included For piggy-back mounting of a guiding telescope Enables astrophotography with autoguiding CNC machined Aluminum Additional 1/4" photo thread holes available SCOPE OF DELIVERY Dovetail clamp Screw set (2pcs M6x25mm)

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.

Maksutov Newton MN-152 David H. Levy Comet Hunter Telescope Highly corrected optic for wide-field observation and astrophotography. Developed in collaboration with the famous "comet hunter" David H. Levy. The Maksutov-Newton system does have some pros and cons respectively to the classical newtonian design. Apart from the higher price the main disadvantage is the higher weight - the thick corrector lens at the front is the cause for this. The main advantage of the Maksutov-Newton compared to the classical newton is the sharpness of the field of view. Classical newtonian telescopes do show a sharp pinpoint star image only at the middle of the field of view - outside the optical axis they have a dominant abberation, the so called coma. This is inherent in the newtonian design, and therefore valid for all newtonian telescopes of all brands and not caused by manufacturing tolerances. Coma distorts the star image - the pinpoint star shows a tail, just like a small comet. This decreases sharpness and contrast considerably. The Maksutov-Newton shows a much sharper star image - for most applications the coma is not visible. This results in a high contrast image all over the field of view - for visual observations and for astrophotography with DSLRs alike. This makes the Maksutov-Newton a ideal all-purpose telescope, that is able to show a sharp field without the need for additional correctors. SCOPE OF DELIVERY Optical Tube Carbon fiber with 2’’ focuser and reduction 10:1 Carbon dew shield with dust cap Tube rings with dovetail Explore Scientific 52° LER Eyepiece 30mm 8x50 finder scope with illumination Eyepiece Barrel diameter: 2’’ and 1.25’’ Universal 44mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5) Instruction manual SPECIFICATIONS Overall length including dew shield: 825mm Net weight including tube rings, handle, dew shield and finderscope: 7,9kg

BRESSER EXOS-2 GoTo Equatorial Mount. Mount, tripod and hand box with computer. This German mount has tracking motors in both axes that follow celestial objects very precisely.The handbox with GoTo works reliable and controls the mount in every situation. Precise ball bearings in both axes ensures minimal backlash at all nine possible tracking speeds.The battery pack (12 V) is conveniently fastened to the tripod shelf and takes eight size "D" batteries.The mount rests on a very tough and rigid stainless steel tripod and can take optical tubes of up to 13 kg. GOTO - Stargazing at the push of a button! The Startracker GoTo System enables beginners to start astronomical observations in just a few minutes, and guides you to objects that are hard to localize through a standard finder scope.Just push the button and the GoTo System will find planets, nebulae or galaxies for you and position your telescope automatically and precise.The GoTo System database includes thousands of astronomical objects.The Messier mount with GoTo System allows you to observe without tedious searching, or image faint objects that are hard to find in a standard finder scope.The BRESSER StarTracker GoTo systems uses servo motors for both axes and features an ST-4 compatible autoguiding input. Guiding aggressivity can be set on the mount itself. The menu navigation of the Startracker Handbox is also multilingual and offers the settings of German, English, French, Spanish and Italian.CHARACTERISTICS MOUNT Stable parallactic mount with fine drive in both axes Ball bearings in both axes for more precise movements Stable height adjustable stainless steel tripod ( Min. 69cm / Max. 109,5cm ) Load capacity up to 13 kg payload Circular bubble for easy horizontal alignment GoTo Mount with motors and hand box controller, for easy finding and guiding moon, planets, stars and much more ST-4 compatible autoguider interface Pole height scale for setting the latitude Scaled graduated circular rings to facilitate finding objects using a star atlas or planetarium software Pole finder scope with optional illumination ( item no. 4964212 ) Tripod weight: 4.7 kg Mount weight: 6.7 kg (without counterweight) Total weight incl. counterweight: 15.9 kg Batteries: not included SCOPE OF DELIVERY Equatorial EXOS 2 GOTO mount with stainless steel tripod and Startracker handcontroller Adjustable polar finder scope with optional illumination Stainless steel tube field tripod with accessory tray 1 x 4.5 kg counterweight

THE PMC-EIGHT GOTO SYSTEM JUST AWARDED A SKY AND TELESCOPE HOT PRODUCT FOR 2018. The Explore Scientific EXOS2-GT with PMC-8 Electronics is quite unique and special. Most of the serious amateur mounts on the market today offer single processors. The PMC-8 electronics are extremely robust. They include a 2-Channel Multi-Processor Micro-controller with 8 CPUs that run independently and are completely deterministic in their behavior, thus the name PMC-8. Within this multi-processor system is a 64 Kbyte EEPROM Non-Volatile Memory bank used to store parameters; a Wireless Ethernet 10/100 with full IP function which permits operation from anywhere using a browser, ASCOM, or APP over the web or serial port; and Non-Volatile Memory used to store user selected parameters. The electronics also includes an Auto-Guide port (ST4 contact input) and features the only wireless ASCOM driver on the market. The belt driven system uses 2 timing pulleys (1-45 groove and 1-10 groove) with fiberglass re-enforced neoprene belt connected to a Nema11 bi-polar stepper .67 amps 12ncm motor then connected to the worm. Precise ball bearings in both axes ensures minimal backlash at all nine possible tracking speeds. The included battery pack (12 V) takes eight size "D" batteries. The head rests on a very tough and rigid stainless steel tripod with adjustable 2" legs from 26.8" to 42.5" and can support up to 28 lbs. of equipment. This system is all controlled from a tablet, notebook or desktop pc with 7" display and WIN8.1, WIN10+11, iOS or Android 4.4 with a beautiful full graphical user interface using our very own ExploreStars OpenGoto® Software. The ExploreStars OpenGoto® Software has the same basic functions as most all other mounts on the market today. ExploreStars is a free App downloadable from the Microsoft App store and GooglePlay. The basic download includes a standard 2 star or 3 star alignment procedure, over 70,000 star database, the Messier Catalog and Solar System objects. The software interface features a Classic four-button pattern for guiding, centering, moving and slewing on the touch screen of your tablet or phone. Pull-down menus open to offer the intuitive 2 star and 3 star alignment procedure, selection of the various catalogs, guided tours, the sync button, the park position, search feature and the coordinate input screen to enter RA and DEC coordinate information. Numerical key pad allows for selectable and user enterable GOTO speeds for slewing, centering and guiding rates. You can also set sidereal, king, lunar, solar, and user defined tracking rates. What makes this software different is that YOU can write your own code and import it into this software. Create a Messier challenge. Create a selectable list of objects you want to photograph and program that information into the software. With the ability to write your own code, you can create whatever your heart desires. Share it with the community of astronomers that are using this software. In addition, this mount can be controlled by any ASCOM compliant software using the built-in wireless ASCOM driver. GPS-compatible and auto time / date settings are dependent on optional receiver on computer, tablet or phone.Here are most of the ASCOM software packages available for use with the Explore Scientific / Losmandy G-11 with PMC-8 mount: ACP; APT; AST / ATC & Ricerca (Omega Lab); AstroArt; AstroMB; Cartes du Ciel / Sky Chart; CCD AutoPilot; DeepSky; Deepsky Planner; DFM Engineering; Earth Centered Universe Pro; EasySky; Eye and Telescope; Project Pluto; Hallo Northern Sky; Maxim DL; MaxPoint; PinPoint Astrometric; Prism; Sequence Generator Pro; Sidereal Technology; The Sky; SkyMap Software; SkyTools 3; Star Atlas PRO; Sky Observer; StarryNight; Stellarium; Virtual Moon Atlas; and WorldWide Telescope.VIDEO REVIEW:https://youtu.be/tmNPajsd9H4 IMPORTANT NOTE: To start using ExploreStars app, download the free app and download the celestial data set that contains the astronomical catalogs, reference images, and reference text. Simply by unzipping the ExploreStars folder containing the expanded celestial data set into your Pictures directory, you will expand the native database from a thousand objects to over seventy thousand objects.SOFTWARE DOWNLOAD: https://explorescientificusa.com/pages/software-and-downloads-for-pmc-eight-systemFEATURESUnique PMC-8 Open Goto SystemBeautiful full graphical user interface using our very own ExploreStars OpenGotoWifi controlled by Tablet, Notebook or Desktop PC with 7" or larger display, and Wifi function (not included)Needed system software of optional computer or tablet: WIN8.1, WIN10/11, iOS or Android 4.4 or higherClassic four-button pattern and joystick for guiding, centering, moving and slewing on the touch screenIntuitive 2 star and 3 star alignment procedureMultiprocessor Micro Controller with 8 CPU´sMicro-Stepper Motors NEMA-11Highly accurate and silent Belt-Drive System ST-4 compatible autoguider portASCOM Driver available: YES, supports also Pulse-GuidingYOU can write your own code and import it into this softwareGPS-compatible and auto time / date settings are dependent on optional receiver on computer, tablet or phoneSCOPE OF DELIVERYExplore Scientific EXOS2-GT with Open GOTO PMC-8Stainless steel tripod with 2" legs and bubble levelCounter weight 2 x 4,5 kg Polefinder with illumination unitPower supply 12 volts / 2,0 ampereExploreStars Software via downloadIMPORTANT NOTE: This package doesn´t include any WINDOWS/iOS/Android Computer or Tablet.FAQ / KNOWLEDGE-BASE:  https://explorescientificusa.com/pages/explore-scientific-knowledge-base-and-faqsPMC-Eight GROUPS:  https://espmc-eight.groups.io/g/MAIN