EXPLORE SCIENTIFIC 2" CLS Nebula 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 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.

After three years of testing and refining we are extremely proud to present the new Explore Scientific High Resolution (HR) Coma Corrector. This corrector is a class of it´s own - it is fully functional for visual use and expands the focal length by only 6%! The Explore Scientific Coma Correktor is delivered as a complete set together with a rotating helical focuser with laser-etched scale, so you get a full package: corrector, adaptor to T2 (M42x0.75mm), adaptor to M48 (M48x0.75) and the helical focuser for visual fun. This coma corrector really is "high resolution" - it deliveres a visual polystrehl performance of 0,98 at f/4 and 0,96 at f/3! So it can stay in the telescope - and you will not only enjoy a tack-sharp Jupiter, but aslo sharp and defined moons in the future! What this means in terms of performance is shown in the three pictures with the graphs - the sharpness increase in those comparisons with and without corrector are stunning (examples are 400mm f/4, f/3,5 and f/3). Please notice: These graphs are for FLAT FIELD! You will get this performance without refocussing! Diameter of the field is 30mm - it doesn´t make sense to increase this with 2" and fast optical systems. Length of the 2" corrector barrel is approx. 85mm and it can be used with almost all 2" focusers on the market. To use the HR Coma Corrector visually, you need to have at least 32mm spare inward travel at your focuser, while the focus is on the same plane as the focusers end. Photographically there is no problem - the HR Coma Corrector shifts the focus outward by about 35mm, so that you will have no problem in achieving focus, when you are able to focus your camera without the HR Coma Corrector. FEATURESEliminates coma, field-curvature and astigmatism in newtonians Diffraction limited performance on axis and in the field Flattens the field Works for very fast systems down to f/3 Four-lens construction Can be used with almost all 2" focusers on the market SCOPE OF DELIVERY High Resolution (HR) Coma Corrector Adaptor to T2 (M42x0.75mm) Adaptor to M48 (M48x0.75) Helical focuser

Universally usable variable polarizing filter with a  2" filter thread.This variable polarizing filter allows for a continuous adjustment of the image brightness. This is very helpful to level strong differences in contrast of different observation objects individually. Particularly for lunar and planetary observations but also for solar observations this filter prevents an outshining of details.Solar observations ONLY together with an adequate solar filter !!! Particularly when a Herschel wedge is used and with large objective lens apertures the use of the variable polarizing filter can reduce the brightness of the observation object to a confortable level. The large adjustment range of 40% to 1% light transmission and the neutral grey filter effect create a comfortable and unadulterated image.The handling is very simple. The desired filtering level is set by turning the two sides of the housing against each other.A 2.0" filter thread on both sides (female/male) allow for the simultaneous use of additional colour filters.FEATURESvariable polarizing filterindividually adjustable image brightnessmade from high-quality optical glassblack anodized aluminium housing2.0" filter thread on both sidesSCOPE OF DELIVERYpolarizing filterprotective box

A very good diagonal mirror for telescopes with 2" focuser and for the BRESSER Messier telescopes with a 2.5"- HEX focuser. Enables the use of eyepieces and accessories with 2" barrel, so that a wider field of view can be reached. A larger light beam and a comfortable observation position is achieved by this 2 inch zenith mirror. Especially for use with refractors and for zenith observations a useful accessory.  The clamping ring is made of brass, so there will be no scratch marks on your high-quality eyepiece. The precise clamping is another advantage. The BRESSER 2" Diagonal Mirror is completely made of metal and has a very accurate flat mirror. The dielectrical coating delivers a 93% reflectance and is very durable against enviromental influences. FEATURES Star diagonal mirror for focuser with 2" barrel High quailty flat mirror Dielectrical mirror coating delivers a 93% reflectance Very durable against enviromental influencesEyepiece adapter 1.25/2.0 inch includedBrass eyepiece clamping ring Housing completely made of metal Dust caps included SCOPE OF DELIVERY diagonal mirroreyepice adapter 1.25/2.0 inch dust caps

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 O-III filter uses a characteristic property of the so called emission nebulae. Those objects glow in special colours, the so called emission lines. Those emission lines are linked to chemical elements - in this case oxygen. The EXPLORE SCIENTIFIC O-III nebula filter blocks all other colours (and thereby nearly all of the artificial light) and only the two emission lines of the 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 veil nebula NGC 6992 is almost not visible with a 200mm telescope. By using this filter you can see the nebula and its 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 so called emission nebulaeblocks almost the entire artificial lightonly the two emission lines of ionised oxygen passes the filterWHAT'S INCLUDED1x 2" O-III nebula 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

The longest focal length in the 52° Series with the longest eye relief, the 40mm is also the only 2.0-inch O.D. eyepiece in this series. Explore Scientific now has three 40mm eyepieces in its collection, the other two are the 40mm 62° Series, and the 40mm 68° Series. At this focal length, this eyepiece is generally reserved for deep sky observers who challenge themselves to observe near the faintest observable limit of their telescopes. The huge true field of view is perfect for deep sky objects like the Andromeda Galaxy, the Rosette Nebula, as well as large star clusters, and comets.Comfort, Quality, Value. The Explore Scientific 52° LER Series mid-range focal length eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality and value versus a comparably priced Plossl.  These eyepieces are the choice for observers wearing glasses - with excellent performance and durability. The rubber inlet and the foldable eyecups make handling and using in the field easy. The patented EMD-coating produces high contrast images and prevents reflexes and ghosting. The argon purging effectively prevents internal fogging, and you don´t have to deal with dirt, fungus or cleansing fluids getting between the lenses. The eyepieces are sealed - this makes sure you will be able to enjoy these eyepieces for many years to come.SPECIFICATIONSLarge eye distance, large field and great image sharpnessExcellent viewing position for people with glassesExcellent field sharpness even with fast optics52° apparent field of viewArgon-purging prevents internal fogging, the sealing facilitates cleaningPatented EMD-coating to maximize contrastBlackened lens edges to avoid reflexesAll eyepieces of this series are parfocalStainless steel barrel with conical security cutoffDust covers and protective bag includedSCOPE OF DELIVERY52° EyepieceDust coversProtective bag

Smart Telescope for Everyone: Easy Access to the Night Sky Reach for the stars with the ZWO Seestar S50 Smart Telescope. This innovative, smart apochromat combines high-quality optics and smart technology with incredible ease of use! Imagine sitting relaxed on your terrace, a glass of wine in hand, while the Seestar S50 explores the vast expanses of the universe for you and sends real-time images to your smartphone or tablet. Astronomy from the Comfort of Your Couch Simply choose your desired object from the countless galaxies and nebulae available in the star catalog of the intuitive app. The ZWO Seestar S50 Smart Telescope will automatically move to the selected object. The all-rounder automatically focuses on the celestial object before beginning the capture and sends real-time images to your smartphone or tablet. The smart telescope independently sets the optimal camera settings such as exposure time, ISO value, or aperture. High-Quality Optics Meets Smart Technology The high-quality apochromat refractor optics of the Seestar S50 ensure exceptionally clear and color-accurate images. The combination of top-notch optics, advanced automatic star recognition, and effective GoTo functionality makes this smart telescope a powerful instrument for night observation and astrophotography – accessible to everyone! The integrated camera supports high resolutions that capture even the finest details in distant galaxies and nebulae. Focus on the Essentials The Seestar S50 features an integrated filter change mechanism that can be controlled via the app. By default, the UV/IR-CUT filter is used, eliminating unwanted infrared and ultraviolet light while allowing the crucial H-alpha emission nebula band for astronomical photography to pass through. This results in more contrast-rich images of many deep-sky objects. Automatic Image Stacking for Razor-Sharp Shots The Seestar S50 uses the stacking method for creating astrophotos. Multiple individual images are combined or "stacked" in real-time to form a new image. The final image becomes sharper and more detailed as more individual images are combined. Experience how a galaxy millions of light-years away takes shape before your eyes, revealing more details with each passing minute. The result is exceptionally clear images that reveal the depths of space with impressive detail. For Stacking Pros Too Already familiar with stacking and prefer to do the image processing yourself? No problem – the Seestar saves each individual image in RAW format in its internal storage on request. Also a Master of Observation During the Day Not only stars and galaxies at night, but the Seestar S50 also offers fascinating observation possibilities during the day. Create landscape images and safely observe the sun with the included solar filter, marveling at its impressive sunspots. The S50 is a true all-rounder for any time of day or night. Share Your Discoveries The Seestar S50 makes it easy to quickly and easily share your astrophotographic achievements with friends or the astronomy community. With just a few clicks, you can publish your images directly from the app on social networks. Whether capturing fascinating lunar craters, glowing nebulae, or colorful galaxies – share your observations and inspire others with your discoveries! FEATURES Optic Type: Apochromat Refractor Automatic image stacking for enhanced sharpness and detail without extensive PC post-processing Smart telescope with fully automatic alignment and tracking Telescope for night and solar observation as well as landscapes Operation via an intuitive app (iOS/Android) Live-view observation and photography in real-time Compact and lightweight design for maximum mobility Integrated Wi-Fi function High optical resolution for sharp and detailed astrophotography SCOPE OF DELIVERY ZWO Seestar S50 Smart Telescope Integrated camera for high-resolution astrophotography Solar filter for safe daytime observations Carbon tripod Carrying case USB-C charging cable (power adapter not included) User manual Access data to the extensive star and galaxy catalog app

The Vixen corrector PH is a 3-element Wynne corrector for demanding applications. Designed for the Vixen R200SS Newtonian reflector, but also suitable for other optics with similar specifications.The optical design consists of 3 lenses in 3 groups. The corrector provides excellent correction of system-induced coma of parabolic mirrors and the resulting spherical aberration. The corrected field has a diameter of 44 mm, making it suitable for the 24x36 mm format (full-frame DSLR/CCD cameras). This guarantees razor-shape images across the entire field. The lens surfaces are coated with a cutting-edge 99.9% anti-reflective AS coating, which is also used for Vixen's flagship VSD100F3.8.Turn your Vixen R200SS reflector telescope into the perfect astrograph!FEATURESPremium coma corrector for the R 200SS Newton refelctor 3 lens systems in 3 groups, guarantees absolute colour purity and sharp stars to the edge of the field of viewImage illumination up to 44 mm for full-frame imagesReduces the focal length of the R 200SS from 800 mm to 760 mm 1:3.8Also suitable for visual observations with an eyepiece adapterWeight: 175 gDELIVERY CONTENTComa correctorDust caps on front and back

The EXPLORE SCIENTIFIC 3" 0.7x Reducer/corrector, reduces a compatible telescope's focal length by a factor of 0.7x (for around f/8) and 0.8x (for around f/10) respectively. The reducer/corrector not only reduces the focal length but also flattens the field. Although originally developed for the Explore Scientific ED-APOs 127mm and 152mm, the reducer can be used with many systems - for example with the Explore Scientific ED-APOs 102mm and 165mm (please note, this will not work on the Explore Scientific 80mm ED Apo refractors though). With certain telescope focal lengths, a slight restriction of the correction at the edge of the image field can be expected when using full-frame sensors. This unit comes with 3" barrel adaptor for direct focuser thread M54x0.75 (the standard focuser thread of the Explore Scientific Essential series of ED Apos) and T2 camera adaptor. This reducer/corrector features a free aperture of 65mm, so that it can be used even with cameras that have a large sensor - if the telescope allows for this. Note: As previously mentioned, this Reducer/corrector comes with a screw on ring, which fits the standard focuser thread of the Explore Scientific Essential series of ED Apos. For telescopes which are equipped with the 2.5" HEX Focuser, the optional screw-on adapter part no: 0510366 is needed. Other telescopes, not in the Explore Scientific range, with standard 2" push-fit focusers will need the Explore Scientific 2" Adaptor for 3" Corrector - part no: 0510364 to get this reducer correctly fitted. SPECIFICATIONS Reduces the focal length by 0.7x at f/8 Flattens the field for astrophotography Developed for ED127 und ED152 APO telescopes Also fits Explore Scientific ED102 and ED165 telescopes - and others Free aperture: 65mm Inner thread for telescope adaption: M76x0.75mm Outer thread for camera adaption: M72x0.75mm 3" focuser barrel adaptor included Adaptor for Explore Scientific focuser M54x0.75mm included T2 camera adaptor M42x0.75mm included Diameter: 78.5mm; length: 100mm Length without adaptors: 52mm Weight without adaptors: 530g What's Included Reducer/Flattener 3" focuser barrel adaptor Adaptor for Focuser M54x0.75mm T2 camera adaptor M42x0.75mm Dust caps

HINWEIS: Es handelt sich bei diesem Artikel um Gebrauchtware bzw. Rückläufer. Das bedeutet: Der Artikel kann leichte Gebrauchsspuren aufweisen und die Verpackung kann von der Originalverpackung abweichen. Bitte beachten Sie, dass für Refurbished Artikel generell 12 Monate Garantie gelten.Das Okular mit Wow-Effekt: Durch das enorme Gesichtsfeld und die hohe Vergrößerung fühlt es sich an, als schwebe man zwischen den Sternen, statt Sie nur durch ein Teleskop zu betrachten. Das einzigartige Beobachtungserlebnis übertrifft sogar die Erwartungen von erfahrenen Amateurastronomen - mit diesem Okular ist man mittendrin!Selbstverständlich bietet es die gleiche Ausstattung wie die etablierten 100° Okulare: Schutzgasgefüllt und wasserdicht sind die hochwertigen EMD Vergütungen vor Umwelteinflüssen geschützt. Staub, Glaspilz und Reinigungsflüssigkeiten können nicht ins Okular gelangen.So haben sie viele Jahre Freude an diesem ultimativen Okular!