Skip to main content Skip to search Skip to main navigation

EXPLORE SCIENTIFIC Teleextender 2x 31.7mm/1.25"

With BRESSER, you can enjoy a smooth introduction to the vast world of astronomy. Our detailed information ("Telescope Guide") provides valuable tips for beginners—but even experienced astronomers can use the information we provide (e.g., tables for the geographical latitude of all major world cities) as a reference.

Here is the table of contents of the comprehensive BRESSER Telescope Guide:

Sky Guides by Bresser

The Sky Guide provides comprehensive information on constellations, planetary positions, and astronomical events – perfect for planning your observations and delving deeper into astronomy.
Visit the guide directly here to make the most of your observations!

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 1.25" Filter Grey ND0.9
The neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradiation when observing the Moon with any telescope 4"(10.2cm) and larger. The ND96 filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness. Very flat design, with only 5.0mm light path. FEATURESreduces brightness for a higher contrastideal for observing the mooncan be combined with other colour filtersvery flat design, with only 5.0mm light path SCOPE OF DELIVERY 1x Color Filter #ND96 Moon Filter (0.9 density; 13% transmission)

Available

£24.00*
EXPLORE SCIENTIFIC 62° LER Eyepiece 5.5mm Ar
If a observing session is a relaxing and joyful experience is heavily dependend on the choice of eyepieces. People wearing glasses very often have the problem to see the entire field of view when they are using eyepieces with large apparent fields. This problem is now history. The new 62°- LER eyepieces by Explore Scientific do not only offer excellent image sharpness and high resolution and contrast over the full field of view - you can see that full field without problems even with glasses on. Fatigue due to tense head positioning and strained viewing simply does not happen because of the excellent viewing comfort these eyepieces provide even to observers wearing glasses. Enjoy the unique combination of excellent image sharpness out to the edge of the field even for fast optics, superior contrast and unmatched viewing comfort. Eyepieces with perfect combinations of various modern glass substrates and highest standards in manufacturing, quality control and service are a tradition at Explore Scientific - the outstanding resolution and sharpness to the very edge.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 patentet 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.Eye relief: 13mm

Available

£105.00*
EXPLORE SCIENTIFIC Telextender 3x 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 astrophotographytripling the effective total focal length of the telescopeFour lens telecentric design Fully multicoatedFilter thread for color or nebula filters

Available

£108.00*
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

Available

£185.00*
EXPLORE SCIENTIFIC 82° LER Eyepiece 8,5mm Ar (1,25")
The visual effect of these new 8,5mm 82° LER eyepieces with their long eye-relief and their 82° apparent field is truly a full-immersion experience. Your eye is relaxed, allowing you to easily use the averted vision technique to study faint details across a huge field-of-view. The 82° Series eyepieces come with foldable eyecups make handling and using in the field easy. As experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope. To keep internal reflections to a minimum, all internal surfaces of the eyepiece barrel are flat black, as well as the edges of the lenses themselves to minimize the scattering of light within the lenses themselves.These eyepieces are the choice for observers wearing glasses - with excellent performance and durability. 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.Comfort, Quality, Value. The Explore Scientific 82° LER Series Most short focal length eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. These extreme wide field eyepieces are optimized to produce high contrast and high resolution characteristics.SPECIFICATIONSLarge eye distance, large field and great image sharpnessExcellent viewing position for people with glassesExcellent field sharpness even with fast optics82° 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 DELIVERY82° EyepieceDust coversProtective bag

Available

£175.00*
EXPLORE SCIENTIFIC 52° LER Eyepiece 25mm Ar
Solidly in the mid-magnification range for most amateur telescopes, the 25mm is a true workhorse for visual observers. If you love deep sky observing, eyepieces in this focal length range not only give healthy increases in magnification, but the contrast enhancement of giving a darker background sky can make all the difference of how galaxies and nebulae appear under suburban skies.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.SPECIFICATIONS:Large 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 DELIVERY:52° EyepieceDust coversProtective bag

Available

£79.00*
Skip product gallery

Customers also viewed

BRESSER Erudit ICD Stereo Microscope (30.5)
The BRESSER Erudit ICD microscope is a stereo dissecting microscope and gives a threedimensional view. This is especially impressive when viewing structured materials.WIth the maximum object height of 53mm you can view also bigger objects. The microscope is perfect for a variety of objects, like plants, insects, geological handpieces, etc. The Erudit ICD is also the perfect choice for children, because there is no need for tedious and difficult sample preparation. Simply place the sample on the object plate and view the finest details! The black/white object plate gives good contrast when viewing with incident light. With battery power the microscope is ready for your next excursion or field work, or use it anywhere around the house. With the sturdy carry case it is easily transported or stowed away.FEATURESType: Stereo microscope / dissecting microscope with incident and transmitted lightApplications: Biology, botany, insectsBlack/White-Object plate for optimized contrastGlass object plate, 94mmRubber eye cups for comfortable viewing, reduces stray lightSmartphone holder for conveniant documentationLong life LED lighting, battery powered. Use anywhere, e.g. for field workAdjustable binocular head, diopter adjustmentSturdy carry caseSPECIFICATIONSMagnification: 20x, 40xStereo-ObjectiveEyepiece barrel diameter: 30,5 mmBattery powered (3x )Type AASCOPE OF DELIVERYStereo dissecting microscope with transmitted and incident light2x wide field 10x eyepiecesStereo objectives, 2x/4xGlass object plate, clear glass Black/white object plateSmartphone holderPlastic carry case

Available

£189.99*