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NATIONAL GEOGRAPHIC 90/900 Refractor Telescope EQ3

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Guides & Tips

FAQ - Frequently Asked Questions

That is normal. Finder scopes are only used to make objects easy to locate. The image orientation does not matter for observation.

  • Alt-azimuth: easy to use, moves horizontally and vertically
  • Equatorial: enables precise tracking of objects with only one axis – ideal for high magnifications and astrophotography

  • Moon: from 30 mm
  • Planets: from 100 mm
  • Deep sky: from 150 mm
Are you a member of an astronomy club? Find out here what your benefits are.
View conditions

Product and safety instructions


Manufacturer: 
Bresser GmbH, Gutenbergstraße 2, 46414 Rhede

Contact: 
www.bresser.de


Warning notes
  • This item is not suitable for children under 3 years.
  • Keep packaging materials (plastic bags, rubber bands, etc.) and small parts away from children! There is a risk of suffocation!
  • Never look directly at the sun or near the sun with this device. There is a RISK OF BLINDNESS!
  • Risk of material damage! Do not disassemble the device! In case of a defect, please contact your specialist dealer. They will contact the service center and may send the device for repair if necessary. Do not expose the device to temperatures above 60° C!
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Accessories

OCULUM VERLAG - Fernrohr-Führerschein in 4 Schritten (GERMAN)
Please note that this astronomy book for beginners is only available in German.

Available

£19.90*
OCULUM VERLAG - Hobby-Astronom in 4 Schritten (German edition)
Please note that this astronomy book for beginners is only available in German language.

Available

£14.90*
BRESSER Amici Prism 90° 31.7mm/1.25"
An amici prism allows for a comfortable 90° viewing position and creates an erect image without left-right reversal. This makes it especially suitable for nature observations but it can also be very helpful with astronomical observations. Particularly beginners may find it easier to orientate in the sky when they compare the view through the telescope with what they can see with their naked eyes.With this  amici prism an astronomical telescope can be used as a powerful spotting scope.Suitable for refractor telescopes as well as Maksutov-Cassegrain style telescopes with 1,25" visual back.FEATUREScomfortable eye relief for refractor telescopes90°- viewing position and image without left-right reversalastronomical telescope turns to a powerful spotting scope1,25" visual backfully multicoated prismSCOPE OF DELIVERYAmici Prism 90° 31.7mm/1.25"

Available

£49.00*
EXPLORE SCIENTIFIC Sun Catcher Solar Filter for 80-102mm Telescopes
Explore Scientific's Sun Catcher Variable Large Aperture Solar Filters are available in many sizes to work on most telescopes from 60mm up to 10-inch Schmidt-Cassegrain and of course all Bresser and Explore Scientific Telescopes. The Solar Filter material being used is the new advanced 'Solarlite' Film manufactured by world famous Thousand Oaks Optical through years of research and development. 'Solarlite' a new solar film that has the optical quality of glass with the advantages of impregnated polymer. Perfect also for the solar astrophotographer.NOTE: All Explore Scientific Solar Equipment is rated ISO12312-2 supplied by Thousand Oaks Optical and approved for direct observation of the Sun. These solar filters are available in different sizes, the picture above shows three different sizes as an example. This is the solar filter with 90mm filter diameter.SPEZIFICATIONSSpecial objective filter for safe solar observationsISO12312-2 ratedField-stop diameter 90mmFits to outer telescope tube diameter from 90 to 160mmQuick individual match with your telescope diameterFast Setup - Easy UseSCOPE OF DELIVERY1x Sun Catcher solar filter

Currently unavailable

£25.90*
BRESSER Sofi total – Leitfaden zu den Sonnenfinsternissen 2026/27 (GERMAN) + 3x Solar Eclipse Glasses
Please note: This book is written in German!The Complete Guide to the European Total Eclipses on 12 August 2026 & 2 August 2027 Two spectacular celestial events are heading our way – and you'll want to be ready! On 12 August 2026, a total solar eclipse will plunge the skies over Spain, Iceland and Greenland into darkness; then, just a year later on 2 August 2027, the next extraordinary spectacle unfolds over southern Spain and North Africa. Even beyond the path of totality, there's plenty to see: a partial solar eclipse will be visible across much of Europe – with the UK, for example, enjoying an impressive coverage of around 90% in 2026, and still around 40% in 2027. This authoritative guide by NASA astrophysicist Fred Espenak – better known as "Mr. Eclipse" – and Patricia Totten Espenak gives you everything you need to make the most of both events: The science & history of solar eclipses Fascinating facts the whole family will enjoy Practical tips for observing safelyMaps, diagrams and timetablesFull coverage of the total and partial eclipses across Europe, Iceland and Africaand much more... Includes: 3 certified BRESSER Solar Eclipse Glasses for complete peace of mindAlso in the box are 3 BRESSER Solar Eclipse Glasses, so you can sit back and enjoy the view! The high-quality white-light filter film blocks harmful UV and IR radiation, whilst delivering a natural, bright yellow image of the Sun. Robust and ready to use straight away, the glasses are fully reusable and meet the international safety standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories – so you can observe in complete safety. Everything you need to know about two of the most breathtaking astronomical events of our time – written by two experts who have witnessed over 50 solar eclipses between them, and complete with the eye protection you need for every unforgettable moment. FEATURES BOOKFascinating facts about the phenomenon of solar eclipses Detailed information on both upcoming eclipses in 2026 and 2027 Packed with colour photographs, clear graphics and maps Language: German Authors: Fred Espenak, Patricia Totten Espenak 50 pages FEATURES SOLAR ECLIPSE GLASSESSpecialist glasses designed for safe solar eclipse viewing Delivers a natural, bright yellow image of the Sun Perfect for safe visual observation of the Sun Highly resistant to damage Ready to use straight out of the box Meets the eye and face protection standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories SCOPE OF DELIVERY1x Book "Sofi total" (German edition)3x Solar eclipse glasses

Available

£13.90*
BRESSER Get Eclipsed – Guide to the European Total Eclipses 2026/27 + 3x Solar Eclipse Glasses
The Complete Guide to the European Total Eclipses on 12 August 2026 & 2 August 2027 Two spectacular celestial events are heading our way – and you'll want to be ready! On 12 August 2026, a total solar eclipse will plunge the skies over Spain, Iceland and Greenland into darkness; then, just a year later on 2 August 2027, the next extraordinary spectacle unfolds over southern Spain and North Africa. Even beyond the path of totality, there's plenty to see: a partial solar eclipse will be visible across much of Europe – with the UK, for example, enjoying an impressive coverage of around 90% in 2026, and still around 40% in 2027. This authoritative guide by NASA astrophysicist Fred Espenak – better known as "Mr. Eclipse" – and Patricia Totten Espenak gives you everything you need to make the most of both events: The science & history of solar eclipses Fascinating facts the whole family will enjoy Practical tips for observing safelyMaps, diagrams and timetablesFull coverage of the total and partial eclipses across Europe, Iceland and Africaand much more... Includes: 3 certified BRESSER Solar Eclipse Glasses for complete peace of mindAlso in the box are 3 BRESSER Solar Eclipse Glasses, so you can sit back and enjoy the view! The high-quality white-light filter film blocks harmful UV and IR radiation, whilst delivering a natural, bright yellow image of the Sun. Robust and ready to use straight away, the glasses are fully reusable and meet the international safety standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories – so you can observe in complete safety. Everything you need to know about two of the most breathtaking astronomical events of our time – written by two experts who have witnessed over 50 solar eclipses between them, and complete with the eye protection you need for every unforgettable moment. FEATURES BOOKFascinating facts about the phenomenon of solar eclipses Detailed information on both upcoming eclipses in 2026 and 2027 Packed with colour photographs, clear graphics and maps Language: English Authors: Fred Espenak, Patricia Totten Espenak 50 pages FEATURES SOLAR ECLIPSE GLASSESSpecialist glasses designed for safe solar eclipse viewing Delivers a natural, bright yellow image of the Sun Perfect for safe visual observation of the Sun Highly resistant to damage Ready to use straight out of the box Meets the eye and face protection standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories SCOPE OF DELIVERY1x Book "Get Eglipsed"3x Solar eclipse glasses

Available

£13.90*
BRESSER Éclipse totale – Guide des éclipses solaires 2026/27 (FRENCH) + 3x Solar Eclipse Glasses
Please note: This book is written in French!The Complete Guide to the European Total Eclipses on 12 August 2026 & 2 August 2027 Two spectacular celestial events are heading our way – and you'll want to be ready! On 12 August 2026, a total solar eclipse will plunge the skies over Spain, Iceland and Greenland into darkness; then, just a year later on 2 August 2027, the next extraordinary spectacle unfolds over southern Spain and North Africa. Even beyond the path of totality, there's plenty to see: a partial solar eclipse will be visible across much of Europe – with the UK, for example, enjoying an impressive coverage of around 90% in 2026, and still around 40% in 2027. This authoritative guide by NASA astrophysicist Fred Espenak – better known as "Mr. Eclipse" – and Patricia Totten Espenak gives you everything you need to make the most of both events: The science & history of solar eclipses Fascinating facts the whole family will enjoy Practical tips for observing safelyMaps, diagrams and timetablesFull coverage of the total and partial eclipses across Europe, Iceland and Africaand much more... Includes: 3 certified BRESSER Solar Eclipse Glasses for complete peace of mindAlso in the box are 3 BRESSER Solar Eclipse Glasses, so you can sit back and enjoy the view! The high-quality white-light filter film blocks harmful UV and IR radiation, whilst delivering a natural, bright yellow image of the Sun. Robust and ready to use straight away, the glasses are fully reusable and meet the international safety standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories – so you can observe in complete safety. Everything you need to know about two of the most breathtaking astronomical events of our time – written by two experts who have witnessed over 50 solar eclipses between them, and complete with the eye protection you need for every unforgettable moment. FEATURES BOOKFascinating facts about the phenomenon of solar eclipses Detailed information on both upcoming eclipses in 2026 and 2027 Packed with colour photographs, clear graphics and maps Language: French Authors: Fred Espenak, Patricia Totten Espenak 50 pages FEATURES SOLAR ECLIPSE GLASSESSpecialist glasses designed for safe solar eclipse viewing Delivers a natural, bright yellow image of the Sun Perfect for safe visual observation of the Sun Highly resistant to damage Ready to use straight out of the box Meets the eye and face protection standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories SCOPE OF DELIVERY1x Book "Éclipse totale" (French edition)3x Solar eclipse glasses

Available

£13.90*
BRESSER Eclipse total – Guía de los eclipses solares 2026/27 (SPANISH) + 3x Solar Eclipse Glasses
Please note: This book is written in Spanish!The Complete Guide to the European Total Eclipses on 12 August 2026 & 2 August 2027 Two spectacular celestial events are heading our way – and you'll want to be ready! On 12 August 2026, a total solar eclipse will plunge the skies over Spain, Iceland and Greenland into darkness; then, just a year later on 2 August 2027, the next extraordinary spectacle unfolds over southern Spain and North Africa. Even beyond the path of totality, there's plenty to see: a partial solar eclipse will be visible across much of Europe – with the UK, for example, enjoying an impressive coverage of around 90% in 2026, and still around 40% in 2027. This authoritative guide by NASA astrophysicist Fred Espenak – better known as "Mr. Eclipse" – and Patricia Totten Espenak gives you everything you need to make the most of both events: The science & history of solar eclipses Fascinating facts the whole family will enjoy Practical tips for observing safelyMaps, diagrams and timetablesFull coverage of the total and partial eclipses across Europe, Iceland and Africaand much more... Includes: 3 certified BRESSER Solar Eclipse Glasses for complete peace of mindAlso in the box are 3 BRESSER Solar Eclipse Glasses, so you can sit back and enjoy the view! The high-quality white-light filter film blocks harmful UV and IR radiation, whilst delivering a natural, bright yellow image of the Sun. Robust and ready to use straight away, the glasses are fully reusable and meet the international safety standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories – so you can observe in complete safety. Everything you need to know about two of the most breathtaking astronomical events of our time – written by two experts who have witnessed over 50 solar eclipses between them, and complete with the eye protection you need for every unforgettable moment. FEATURES BOOKFascinating facts about the phenomenon of solar eclipses Detailed information on both upcoming eclipses in 2026 and 2027 Packed with colour photographs, clear graphics and maps Language: Spanish Authors: Fred Espenak, Patricia Totten Espenak 50 pages FEATURES SOLAR ECLIPSE GLASSESSpecialist glasses designed for safe solar eclipse viewing Delivers a natural, bright yellow image of the Sun Perfect for safe visual observation of the Sun Highly resistant to damage Ready to use straight out of the box Meets the eye and face protection standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories SCOPE OF DELIVERY1x Book "Eclipse total" (Spanish edition)3x Solar eclipse glasses

Available

£13.90*
BRESSER Eclissi totale – Guida alle eclissi solari 2026/27 (ITALIAN) + 3x Solar Eclipse Glasses
Please note: This book is written in Italian!The Complete Guide to the European Total Eclipses on 12 August 2026 & 2 August 2027 Two spectacular celestial events are heading our way – and you'll want to be ready! On 12 August 2026, a total solar eclipse will plunge the skies over Spain, Iceland and Greenland into darkness; then, just a year later on 2 August 2027, the next extraordinary spectacle unfolds over southern Spain and North Africa. Even beyond the path of totality, there's plenty to see: a partial solar eclipse will be visible across much of Europe – with the UK, for example, enjoying an impressive coverage of around 90% in 2026, and still around 40% in 2027. This authoritative guide by NASA astrophysicist Fred Espenak – better known as "Mr. Eclipse" – and Patricia Totten Espenak gives you everything you need to make the most of both events: The science & history of solar eclipses Fascinating facts the whole family will enjoy Practical tips for observing safelyMaps, diagrams and timetablesFull coverage of the total and partial eclipses across Europe, Iceland and Africaand much more... Includes: 3 certified BRESSER Solar Eclipse Glasses for complete peace of mindAlso in the box are 3 BRESSER Solar Eclipse Glasses, so you can sit back and enjoy the view! The high-quality white-light filter film blocks harmful UV and IR radiation, whilst delivering a natural, bright yellow image of the Sun. Robust and ready to use straight away, the glasses are fully reusable and meet the international safety standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories – so you can observe in complete safety. Everything you need to know about two of the most breathtaking astronomical events of our time – written by two experts who have witnessed over 50 solar eclipses between them, and complete with the eye protection you need for every unforgettable moment. FEATURES BOOKFascinating facts about the phenomenon of solar eclipses Detailed information on both upcoming eclipses in 2026 and 2027 Packed with colour photographs, clear graphics and maps Language: Italian Authors: Fred Espenak, Patricia Totten Espenak 50 pages FEATURES SOLAR ECLIPSE GLASSESSpecialist glasses designed for safe solar eclipse viewing Delivers a natural, bright yellow image of the Sun Perfect for safe visual observation of the Sun Highly resistant to damage Ready to use straight out of the box Meets the eye and face protection standard EN ISO 12312-2:2015, independently verified by ICS INC. Laboratories SCOPE OF DELIVERY1x Book "Eclissi totale" (Italian edition)3x Solar eclipse glasses

Available

£13.90*
OLIVIA VERLAG - Julius forscht im Weltall (GERMAN)
Please note: This book is written in German language

Available

£15.00*
OCULUM VERLAG - Teleskop-1x1 (GERMAN LANGUAGE)
Please note that this astronomy book for beginners is only available in German language.

Available

£12.90*
Vixen NPL 50° Eyepiece 25mm (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 NPL20, NPL25, NPL30 and NPL40 eyepieces employ twist-up eye-guards for viewing comfort. The lenses are fully multi-coated for high light transmission. FEATURES Push-fit Size: 31.7 mm Apparent field of view: 50° Eye relief: 19.5 mm Weight: 130 g WHAT'S INCLUDED 1x Eyepiece 25 mm (1.25'')

Available

£59.00*
Vixen NPL 50° Eyepiece 30mm (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 NPL20, NPL25, NPL30 and NPL40 eyepieces employ twist-up eye-guards for viewing comfort. The lenses are fully multi-coated for high light transmission. FEATURES Push-fit Size: 31.7 mm Apparent field of view: 50° Eye relief: 24 mm Weight: 120 g WHAT'S INCLUDED 1x Eyepiece 30 mm (1.25'')

Available

£58.00*
Vixen NPL 50° Eyepiece 8mm (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: 4.5 mm Weight: 79 g WHAT'S INCLUDED 1x Eyepiece 8 mm (1.25'')

Available

£49.00*
Vixen NPL Eyepiece 40mm (1.25") Plössl
The new NPL Series Eyepieces: 2-group, 4-element Plossl design offers flat and clear images with well-corrected chromatic aberration. These high-performance eyepieces with full multi-coating are offered at reasonable costs. Not combineable with #3919 Universal Cameraadapter #3931 Cameraadapter SX #3911 Cameraadapter 36,4mm Art.Nr. 39202 NPL 6 mm Plössl 31.7mm (1.25") Art.Nr. 39204 NPL 10 mm Plössl 31.7mm (1.25") Art.Nr. 39205 NPL 15 mm Plössl 31.7mm (1.25") Art.Nr. 39206 NPL 20 mm Plössl 31.7mm (1.25") Art.Nr. 39207 NPL 25 mm Plössl 31.7mm (1.25") Art.Nr. 39208 NPL 30 mm Plössl 31.7mm (1.25") Art.Nr. 39209 NPL 40 mm Plössl 31.7mm (1.25")

Available

£61.00*