Skip to main content Skip to search Skip to main navigation

EXPLORE SCIENTIFIC Telextender 3x 31.7mm/1.25" (Refurbished)

Product and safety instructions


Manufacturer: 
Bresser GmbH, Gutenbergstraße 2, 46414 Rhede

Contact: 
www.bresser.de


Warning notes
  • General safety instructions DANGER Risk of eye injuries! Never look directly at the sun or near the sun through this device. There is a risk of blindness! Children should only use the device under supervision. Keep packaging materials (plastic bags, rubber bands, etc.) away from children! There is a risk of suffocation! FIRE HAZARD! Do not expose the device especially the lenses to direct sunlight! The light concentration could cause fires. RISK of material damage! Do not dismantle the device! In case of a defect, please contact your dealer. They will contact the service center and may send the device in for repair. Do not expose the device to temperatures above 60°C!
  • Never look at the sun through an eyepiece/telescope without a certified protection filter. A moon filter can never be used for solar observation. The moon filter is only suitable for moon observation. The solar filter must be mounted in front of the telescope opening, not at the eyepiece. Otherwise, the concentrated light beam through the optics will immediately destroy the filter foil, leading to severe eye damage, including permanent blindness.
  • Never leave the optics unattended. Children and inexperienced adults could point the telescope at the sun without proper precautions and lose their eyesight.
  • Do not expose the device to high temperatures.
Skip product gallery

Customers also bought

EXPLORE SCIENTIFIC 2" UHC 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.

Currently unavailable

€83.00*
Vixen NPL 50° Eyepiece 10mm (1.25")
The 2-group 4-element Plossl optical design of the NPL series eyepieces delivers flat and clear images with good color correction. The lenses are fully multi-coated for high light transmission. FEATURES Push-fit Size: 31.7 mm Apparent field of view: 50° Eye relief: 6.5 mm Weight: 80 g WHAT'S INCLUDED 1x Eyepiece 10 mm (1.25'')

Available

€49.00*
EXPLORE SCIENTIFIC Star Diagonal Mirror 2" 99%
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

Currently unavailable

€185.00*
EXPLORE SCIENTIFIC Teleextender 2x 31.7mm/1.25"
With teleextenders it is possible to extend the effective focal length of a telescope system, resulting in higher magnification for the observation of the moon, the planets or small Deep-Sky objects with the same eyepieces. So you can use the advantages of eyepieces with longer focal length - such as the bigger eye distance and the more relaxed observing comfort - at high magnifications also.These teleextenders incorporate a telecentric optical design that deliveres a excellent image sharpness over the whole field of view and are premium choices for visual observations and astrophotography. The combination of excellent fully multicoating with superior optical design makes the Focal Extenders superior to classic Barlow lenses.Features: Suitable for visual observations and astrophotographyDoubling the effective total focal length of the telescopeFour lens telecentric design Fully multicoatedFilter thread for color or nebula filters

Available

€105.00*
Skip product gallery

Customers also viewed

NATIONAL GEOGRAPHIC 200x Smartphone Microscope with CPL
Spontaneous microscopy made easy: with the NATIONAL GEOGRAPHIC 200x smartphone microscope with CPL, you can go on your own exciting journey through the microcosm. Simply attach to your smartphone camera and off you go! Whether a leaf or an ant, with the 200x magnification, you can see every detail of the subject on your phone’s screen. The integrated LED lighting with its 2 brightness levels can be adjusted to the surroundings at the tap of a button. Got a little closer to nature and discovered something fantastic? Then take fascinating photographs with your smartphone camera through the mobile phone microscope. The fully multi-coated optical instrument with high resolution allows you to take fascinating photographs that you can then share immediately via social media. The integrated CPL filter optimises the colours and prevents reflection. Always ready for use – a small microscope for great insights The smartphone microscope brings nature’s wonderful detail into focus quickly and easily. Thanks to simple operation with no need for an additional app, you can start your quest immediately, any time and anywhere. The small microscope is completely flexible, with a universal holder that can hold 98% of smartphone models. Always to hand: safely stored in the handy bag, the microscope will quickly become your constant companion. The bag can also accommodate the USB-C charging cable, which you can use to recharge the integrated battery whenever you need to. Easily make the invisible visible – with the NATIONAL GEOGRAPHIC 200x smartphone microscope with CPL. FEATURESMicroscope for smartphone with 200x magnification With CPL filter for natural colours and reduced reflections High resolution Easy to operate, no additional app necessary With universal holder compatible with 98% of smartphone models Integrated LED lighting with 2 brightness levels Compact dimensions, perfect for travelPACKAGE CONTENTS Smartphone microscope USB-C charging cable Cleaning cloth Bag Instruction manual

Available

€37.90*
New
ISA Space Exploration NASA-themed PushTo AR-70/350 Smart Telescope
The ISA Space Exploration NASA-themed PushTo AR-70/350 Smart Telescope knows exactly where it's going: straight to the stars. Position detection and dynamic directional arrows in the intuitive app keep you locked on course to whatever you want to see – channelling the spirit of the great NASA missions every step of the way. Your app, your co-pilot – PushTo navigation What sets this telescope apart? PushTo navigation that works as smoothly as a real space mission. The app takes you through setup step by step – clear, quick, and fuss-free, so you're ready to go before you know it. Pick your target from the large celestial object database, and the rest is easy. Motion sensors catch every movement and beam it straight to your smartphone via Bluetooth, keeping the app in sync at all times. From there, dynamic directional arrows show you exactly where to point the telescope next. Jupiter, the Pleiades, the Orion Nebula – the cosmos is yours to explore What's tonight's target? Your smart telescope has plenty of suggestions. Dig into the comprehensive celestial object database – planets, galaxies, star clusters and more – or simply let the pre-programmed sky tour for the current season do the planning for you. Spring, summer, autumn or winter, there's always something spectacular waiting overhead. Small package, big performance: the refractor telescope for beginners Behind the clever navigation sits a genuinely impressive optical instrument: a high-quality achromatic refractor with 70 mm aperture and 350 mm focal length. As a telescope for beginners, it's hard to beat – compact enough to sit on a tabletop, complete with an integrated accessory tray, and weighing just 3.3 kg. Take it anywhere, set it up in seconds, and let the night sky do the rest. From sunspots to distant star clusters – all within reach A clear evening, fresh air, and the moon filling the eyepiece with jaw-dropping detail – craters, mountain ranges, vast ancient plains. The universe has no shortage of things to show you. Grab the included smartphone camera holder and capture your best moments as photos or videos to keep. On sunny days, you can even turn the telescope on the sun itself – just always use the supplied solar filter* to do it safely. Ready for lift-off? Start your own space mission with the ISA Space Exploration NASA-themed PushTo AR-70/350 Smart Telescope. FEATURES High-quality refractor telescope with position detection Free app that tracks your telescope's viewing direction and motion in real time Intuitive PushTo navigation via dynamic directional arrows Extensive celestial object database and pre-set sky tours Achromatic refractor with 70 mm aperture and 350 mm focal length Compact and lightweight tabletop telescope with integrated accessory tray – great for travel Incl. solar filter for safe solar observation* Photograph through the eyepiece using the included smartphone holder Batteries required: 4 x AA (not included) Alternative power supply: USB-C cable + power bank or mains adaptor (not included) Smartphone holder for navigation mounted directly on the telescope tube Operating system: min. Android 10 / iPhone 11 / iPad 9 / Windows 10/11 * NOTE: Never look at the sun through an eyepiece or telescope without a certified protective filter. Risk of blindness! SCOPE OF DELIVERY Smart telescope 2 eyepieces (6 mm / 20 mm) with 1.25-inch barrel 2x Barlow lens Smartphone holder for eyepiece photography Solar filter Compass with bubble level Instruction manual

Available

€199.00*