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BRESSER Messier 8" Dobsonian The BRESSER Messier 8" dobsonian is simply a breakthrough. Despite of its low price this telesccope offers a versatility and quality rivaling a lot more expensive telecopes. The optical diameter of 203mm (8") does not restrict your observations on solar system objects like the moon or the planets - you can reach farther into the sky and explore globular and open clusters, nebulae and galaxies. With that telescope those objects are beginning to show structures: globular clusters are no longer only fuzzy blobs, but are resolved into masses of individual stars. Nebulae, that can only be barely detected in smaller scopes, reveal structures within. The telescope is setting a new standard in versatility: the excellent Hexafoc focuser boosts a free diameter of 65mm (2,5") so that you do not have vignetting in big widefield eyepieces that is caused by smaller focuser barrels. The big altitude wheels handle those big, heavy eyepieces without problems - and when you intend to load even more (like a binocular viewer with two eyepieces) then you can move the tube in its tube rings and achieve balance within seconds. The excellent rigidity of the focuser makes focusing a snap - even for astrophotography. This is another virtue of this highly versatile telescope system: you can remove the altitude wheels from the tube rings, attach a dovetail and use the optical tube on a equatorial mount for astrophotography - in minutes. The focuser is handling even heavy cameras tilt and shifting-free. You are extremely demanding in your image sharpness? No problem - with the optional 10:1 gear reduction sharp images are easy. If you consider, that the focuser is that part of the telescope that is used most often, you will recognize the quantum leap this Hexafoc represents in a telescope of this price range. With the included standard accessories (LED-finder and 25mm SPL-eyepiece) the telescope is ready for observing. If you need to transport or store the telescope as compact as possible you will like this: the rocker box of the 8" BRESSER Messier assembles and disassembles extremely easy and fast due to the use of metal standard furniture fasteners. So you can transform the bulky rocker box into a handy flat package of boards. This telescope is setting a new standard in usability, versatility and performance in its price class. Newton optics with parabolic primary mirror made from H-PZ33 low expansion glass material 2.5" HEX focuser with rack & pinion drive Large altitude wheels provide smooth and precise movement even at high magnifications Red dot finder and SPL 25mm eyepiece included 6-point flotation system mirror cell for the for primary maximizes optical performance Tube rings facilitate the use of the optics on equatorial mounts The parts or the rocker-box are connected with metal furniture fasteners for easy assembly and dissasembly Diffraction limited optics: Strehl > 0,8 FEATURES primary mirror diameter: 203 mm focal length: 1218 mm 2,5" HEXAFOC focus primary mirror out of special-purpose glass with little thermal expansion shifting-free focusing, even with heavy accessories easy to move the tube dismountable rocker box optics can be attached to other mountings differently sized adjusting- and lock-screws SCOPE OF DELIVERY newtonian reflector LED viewfinder 25mm SuperPloessl eyepiece (Ø 31,7 mm / 1,25") 1 extension shell 37,5mm for 2.5" Hexafoc 1 eyepiece adapter Ø 31,7 to 50,8 mm 2 tube clamps 2 altitude wheels 1 rockerbox with 2 ground boards and assembly material Specifications: Type of telescope: Dobson Tube material: Stel Aperture: 203 mm Focal ratio: f/6 Secondary diameter: 57mm Focal length: 1218 mm Mirror material: Special low expansion H-PZ33 Secondary material: Borosilikat-Glas Focuser: Excellent 2,5" Hexafoc Focuser with possibility to upgrade to a 10:1 reduction Connection to eyepiece: 2" / with adapter 1 1/4" Viewfinder: LED Viewfinder Tube weight: ca. 25.3 lb

Item condition: new and original packed

non focusable 2" eyepiece tube for APM 82 mm 45 degree binoculars

Item condition: new, but not original packed

Berlebach Stativ UNI 26

Item condition: new and original packed

Paris, November 9, 2022 ?RICOH IMAGING COMPANY, LTD. is pleased to announce the launch of the high-performance eyepieces "smc PENTAX XW16.5" and "smc PENTAX XW23" for astronomical telescopes. This expands the XW series to ten eyepieces and rounds out the range of functional, practical focal lengths for a wide range of applications, from low magnification stargazing to high magnifi- cation planetary observation. RICOH IMAGING has a long time experience in manufacturing gear for astro observation. Beside of a product range of Spotting scopes, we are offering a wide range of Eyepieces for the use with telescopes to enjoy astro watching. Due to the increase of telescope users, demand for eyepieces is also being diversified. Out of various demand, we decided to develop new eyepieces to meet the demand of users who want to enjoy star observing with very wide FOV, which makes possible to observe astronomical objects more impressively. With the new XW series eyepieces, we increase the line-up of PENTAX eyepiece, and will en- hance PENTAX brand image as "high quality", "high performance" for Astro fans having mid to upper class telescope such as telescopes over 30cm diameter Main features of the Eyepieces smc PENTAX XW16.5 and smc PENTAX XW23 Particularly large field of view The two new eyepieces of the XW series have the largest field of view in the series at 85°. In combination with an eye relief of 20 mm, they provide a particularly wide field of view for exciting observation of nebulae and star clusters. High-quality optics for exceptional image quality The new eyepieces feature an optical system with 7 elements in 5 groups that surpasses the conventional XW series to deliver sharp star images right to the edge of the field of view. The high-performance optics consist of lanthanum glass elements with high refractive power and particularly low dispersion, which produce a balanced image with minimal aberrations. It is specially designed to reduce the annoying blackout effect by effectively compensating for the spherical aberration of the pupil. PENTAX original multi-coating for outstanding light transmission All lens surfaces that come into contact with the air are treated with the original multi-coating, while all laminated surfaces are treated with the innovative partial coating to achieve light trans- mission of more than 90 per cent (an astonishing 96 per cent at 550nm) across the visible light spectrum. Advanced light-shielding technology for improved image contrast Thanks to PENTAX's advanced computer simulation technology, the XW series features a light- shielding diaphragm in the most effective position to dramatically reduce internal reflections and provide a brighter, higher contrast image. Weatherproof construction for all-weather viewing The XW Series features a JIS Class 4* weatherproof construction that allows use even in drizzle or nighttime dew. Scope of Delivery: 16.5mm Eyepiece

Item condition: new, but not original packed

RICOH IMAGING COMPANY, LTD. freut sich, die Einführung der Hochleistungsokulare "smc PENTAX XW16.5" und "smc PENTAX XW23" für astronomische Teleskope bekannt zu geben. Hiermit wird die XW-Serie auf zehn Okulare erweitert und das Programm aus funktionalen, praktischen Brennweiten für ein großes Anwendungsspektrum, von der Beobachtung von Sternen mit geringer Vergrößerung bis zur Beobachtung von Planeten mit hoher Vergrößerung, abgerundet. RICOH IMAGING verfügt über eine langjährige Erfahrung in der Herstellung von Zubehör für die Astrobeobachtung. Neben einer Produktpalette von Spektiven bieten wir eine Sortimengt von Okularen für die Verwendung mit Teleskopen zur Astrobeobachtung an. Durch die steigende Anzahl von Teleskopbenutzern hat sich auch die Nachfrage nach Okularen diversifiziert. Aufgrund der vielfältigen Nachfrage von Nutzern, die die Sternbeobachtung mit einem sehr breiten Gesichtsfeld genießen wollen, um die Beobachtung astronomischer Objekte noch eindrucksvoller zu gestalten, haben wir uns entschlossen, neue Okulare zu entwickeln Mit den neuen Okularen der XW-Serie erweitern wir die Palette der PENTAX-Okulare. Damit stärken wir das Image der Marke PENTAX als Lieferant von Produkten mit "hoher Qualität" und "hoher Leistung", speziell für Astro-Fans, die Teleskope der mittleren bis oberen Klasse besitzen. Hauptmerkmale der Okulare smc PENTAX XW23 Besonders großes Gesichtsfeld Die beiden neuen Okulare der XW-Serie verfügen mit 85° über das größte Gesichtsfeld der Serie. In der Kombination mit einem Augenabstand von 20 mm liefern sie einen besonders breiten Bildausschnitt für spannende Bobachtung von Sternnebeln und Sternhaufen. Hochwertige Optik für außergewöhnliche Bildqualität Die neuen Okulare verfügen ein neues optisches System mit 7 Elementen in 5 Gruppen, das die herkömmliche XW-Serie übertrifft, um scharfe Sternbilder bis an den Rand des Sehfelds zu erhalten Die Hochleistungsoptiken bestehen aus Lanthan-Glaselementen mit hoher Brechkraft und besonders geringer Dispersion, die ein ausgewogenes Bild mit minimalen Abbildungsfehlern erzeugen.Sie wurde speziell entwickelt, um den störenden Blackout-Effekt zu reduzieren, indem sie die sphärische Aberration der Pupille effektiv kompensiert. PENTAX-Original-Mehrschichtvergütung für herausragende Lichtdurchlässigkeit Alle Linsenoberflächen, die mit der Luft in Berührung kommen, sind mit der Original-Mehrschichtvergütung behandelt, während alle laminierten Oberflächen mit der innovativen Teilvergütung behandelt sind, um eine Lichtdurchlässigkeit von mehr als 90 Prozent (erstaunliche 96 Prozent bei 550 nm) über das sichtbare Lichtspektrum zu erreichen. Fortschrittliche Lichtabschirmungstechnologie für verbesserten Bildkontrast Dank der fortschrittlichen Computersimulationstechnologie von PENTAX verfügt die XW-Serie über eine lichtabschirmende Blende an der effektivsten Position, um interne Reflexionen drastisch zu reduzieren und ein helleres, kontrastreicheres Bild zu erzielen. Wetterfeste Konstruktion für die Beobachtung bei jedem Wetter Die XW-Serie verfügt über eine wetterfeste Konstruktion der JIS-Klasse 4*, die den Einsatz auch bei Nieselregen oder nächtlichem Tau ermöglicht. Lieferumfang: 23mm Okular

Item condition: new, but not original packed

APM ED Apo 12x56 Magnesium Series Binoculars

Item condition: new, but not original packed

This 532nm Green collimator version is much brighter than the red ones (632nm or 650nm). In most circumstances it is overly bright for night time collimation, but it is useful for Barlowed or holographic collimation in daylight or higher levels of ambient light. Aligned to within 15 arc-seconds Scope of Delivery: Laser

Item condition: new and original packed

APM ED Apo 8x56 Magnesium Series Binoculars

Item condition: new, but not original packed

STAR DISCOVERY 90I with Wifi AZ Goto Mount

Item condition: new and original packed

Quarz flat window 315mm diameter, 20mm thickness, small central hole, unknown quality, incl. cell , made at the University of Kiel in Germany

Item condition: used Item with possible small cosmetic deffect, but every function works perfect

Product description Tele Vue - 16 mm Nagler Eyepiece Type 5 Nagler type 5: The 16 mm is with only 198 grams weight a real tiny one. Type 5 gets along with only 6 lenses. Contrast and transmission are simply perfect. The pupil distance is 10 mm, the view is not very comfortable for spectacle wearers, without glasses you have the full field of view without any problems. The 16 is well suited for binoculars and provides the largest actual field of view of all Nagler eyepieces with 1.25? Scope of delivery: Eyepiece TeleVue Nagler 16 mm

Item condition: new and original packed

Schott N-BK7 high precision plane polished optical windows 160 mm diameter, 17,5 mm thickness with Zygo interferogramm from front and back side. Here we show 1 test sample

Item condition: new and original packed