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BRESSER Dobson telescope N 254/1270 Messier Hexafoc DOB teleskoobid
Tootekood: 52181
Bränd: BRESSER
Saadavus: Peale tellimuse vormistamist, anname teada täpse tarneaja.
- Kirjeldus
- Omadused
- Liisingukalkulaator
Tootekirjeldus inglise keeles:
The traditional company Bresser offers telescopes for ambitious beginners at an excellent price-performance ratio under the name Messier. The Messier telescope systems are expandable and retrofittable, so they can be used far beyond the initial entry point.
Dobsonian telescopes are among the most practical instruments in astronomy. They are of simple construction and yet a brilliant idea. They essentially consist of two parts: firstly the optics, which in most cases is a solid tube or truss tube design; and secondly the mount, a wooden box (also called a 'rocker box') which sits on the ground and into which the telescope is inserted. This design allows you to begin observing sessions immediately without first having to spend time setting up and aligning a complicated mount. The basic idea of the Dobsonian design came from the wish to have a big telescope at a low price, a wish that has succeeded brilliantly. A true fan base has developed since the invention of the Dobsonian telescope which is dedicated to these instruments and their fascinating simplicity and to the idea of 'high performance at low price'.
The 254/1270 optics: With the 254-millimetre diameter optics, you can already look far out into the universe and observe globular clusters, nebulae and galaxies. This telescope reveals details and structure in most deep-sky objects: Globular clusters are resolved into individual stars and gas nebulae, which smaller instruments can only faintly make out.
Other advantages of the optics:
Diffraction limited: Strehl > 0.8
9-point mirror cell
Main mirror made of special glass with low thermal expansion: H-PZ33 borosilicate
Many experienced observers prefer Dobsonian telescopes in the 10-inch class (254mm). The optics have considerably greater luminous intensity than the 8-inch models, but the telescope is still manageable: 10-inch models are truly portable and have a viewing height for which a simple stool is enough, rather than a height-adjustable astro-chair.
The excellent large Hexafoc focuser has an aperture of 64mm making it impossible to notice any shading from the focuser tube, even with large widefield eyepieces.
Special advantages of the Messier series Dobsonian telescope:
The Rockerbox is assembled with metal quick-release connectors that allow it to be disassembled and reassembled in minutes without the need for a cordless screwdriver.
The device uses a new 2.5" focuser. It is highly rigid and free of any shifting.
The optical tube sits in a pair of pipe clamps that support the large altitude wheels on the sides. This means that the tube can also be used on a parallactic mount without any problems and can also be rotated along its longitudinal axis to provide the ideal eyepiece view in any position. By moving the tube within the tube clamps, the Dobsonian can be optimally balanced.
SPECIFICATIONS
Optics
Type Reflector
Type of build Newton
Aperture (mm) 254
Focal length (mm) 1270
Aperture ratio (f/) 5
Resolving capacity 0,45
Limit value (mag) 13,8
Light gathering capacity 1320
Max. useful magnification 508
Telescope length (mm) 1200
Telescope diameter (mm) 300
Telescope weight (kg) 16,4
Reflector
Primary mirror - Material PZ33
Adjustable yes
Main mirror´s construction parabolic
secondary mirror design Plan
Secondary Mirror Heating no
Ventilation for central mirror no
Focuser
Type of build Hexafoc
Free aperture (mm) 64
Motorized no
Gear reduction without
Mount
Type of build Dobson
Mounting type Dobson
GoTo control no
Weight (kg) 11,2
Tripod
Material Wood
Type Rockerbox
Accessory plate yes
Included accessories
1.25'' eyepieces SP 25mm
Finder scope 6x30
Eyepiece adaptor 1,25" & 2"
Extension tubes yes
finder schuh Meade/Explore Scientific T-Profil
Solar Filters yes
General information:
Series Messier
Total weight (kg) 27,6
shipping weight (kg) 38,8
Area of application
Astrophotography no
Moon & Planets yes
Nature Observation no
Nebulae & galaxies yes
Sun yes
Recommended for
Beginners yes
Advanced yes
Observatories no
The traditional company Bresser offers telescopes for ambitious beginners at an excellent price-performance ratio under the name Messier. The Messier telescope systems are expandable and retrofittable, so they can be used far beyond the initial entry point.
Dobsonian telescopes are among the most practical instruments in astronomy. They are of simple construction and yet a brilliant idea. They essentially consist of two parts: firstly the optics, which in most cases is a solid tube or truss tube design; and secondly the mount, a wooden box (also called a 'rocker box') which sits on the ground and into which the telescope is inserted. This design allows you to begin observing sessions immediately without first having to spend time setting up and aligning a complicated mount. The basic idea of the Dobsonian design came from the wish to have a big telescope at a low price, a wish that has succeeded brilliantly. A true fan base has developed since the invention of the Dobsonian telescope which is dedicated to these instruments and their fascinating simplicity and to the idea of 'high performance at low price'.
The 254/1270 optics: With the 254-millimetre diameter optics, you can already look far out into the universe and observe globular clusters, nebulae and galaxies. This telescope reveals details and structure in most deep-sky objects: Globular clusters are resolved into individual stars and gas nebulae, which smaller instruments can only faintly make out.
Other advantages of the optics:
Diffraction limited: Strehl > 0.8
9-point mirror cell
Main mirror made of special glass with low thermal expansion: H-PZ33 borosilicate
Many experienced observers prefer Dobsonian telescopes in the 10-inch class (254mm). The optics have considerably greater luminous intensity than the 8-inch models, but the telescope is still manageable: 10-inch models are truly portable and have a viewing height for which a simple stool is enough, rather than a height-adjustable astro-chair.
The excellent large Hexafoc focuser has an aperture of 64mm making it impossible to notice any shading from the focuser tube, even with large widefield eyepieces.
Special advantages of the Messier series Dobsonian telescope:
The Rockerbox is assembled with metal quick-release connectors that allow it to be disassembled and reassembled in minutes without the need for a cordless screwdriver.
The device uses a new 2.5" focuser. It is highly rigid and free of any shifting.
The optical tube sits in a pair of pipe clamps that support the large altitude wheels on the sides. This means that the tube can also be used on a parallactic mount without any problems and can also be rotated along its longitudinal axis to provide the ideal eyepiece view in any position. By moving the tube within the tube clamps, the Dobsonian can be optimally balanced.
SPECIFICATIONS
Optics
Type Reflector
Type of build Newton
Aperture (mm) 254
Focal length (mm) 1270
Aperture ratio (f/) 5
Resolving capacity 0,45
Limit value (mag) 13,8
Light gathering capacity 1320
Max. useful magnification 508
Telescope length (mm) 1200
Telescope diameter (mm) 300
Telescope weight (kg) 16,4
Reflector
Primary mirror - Material PZ33
Adjustable yes
Main mirror´s construction parabolic
secondary mirror design Plan
Secondary Mirror Heating no
Ventilation for central mirror no
Focuser
Type of build Hexafoc
Free aperture (mm) 64
Motorized no
Gear reduction without
Mount
Type of build Dobson
Mounting type Dobson
GoTo control no
Weight (kg) 11,2
Tripod
Material Wood
Type Rockerbox
Accessory plate yes
Included accessories
1.25'' eyepieces SP 25mm
Finder scope 6x30
Eyepiece adaptor 1,25" & 2"
Extension tubes yes
finder schuh Meade/Explore Scientific T-Profil
Solar Filters yes
General information:
Series Messier
Total weight (kg) 27,6
shipping weight (kg) 38,8
Area of application
Astrophotography no
Moon & Planets yes
Nature Observation no
Nebulae & galaxies yes
Sun yes
Recommended for
Beginners yes
Advanced yes
Observatories no
