Explore Scientific Dobson telescope N 305/1525 Ultra Light Generation II DOB

Product description

Specifications

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Product description:

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'.

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Specifications:

Optics Optics X A telescope tube is referred to as an optic because it contains the components necessary to collect and concentrate light. Click to read more...
Type Type X There are basically two different types of telescope. A distinction is made between refractor (lens) and reflector (mirror) telescopes. Click to read more...	Reflector
Type of build Type of build X Describes the exact structure of the telescope thereby further subdividing the different types of telescope. Click to read more...	Newton Newton X Reflector telescope with a secondary mirror at the beginning of the tube which redirects light to one side. Click to read more...
Aperture (mm) Aperture X The aperture indicates the diameter of the objective lens or the mirror. Click to read more...	305
Focal length (mm) Focal length X This is the distance between the objective lens or mirror and the focal point. Click to read more...	1525
Aperture ratio (f/) Aperture ratio X Is the ratio of the aperture to the focal length of a telescope. Click to read more...	5
Resolving capacity Resolving capacity X The ability of the optic to discern the fine detail of objects that are close together. Click to read more...	0,38
Limit value (mag) Limit value X Describes the brightness of a star or point-shaped object, which can still just be distinguished by the telescope. The naked eye, for example, can make out stars with a magnitude of up to 6. Click to read more...	14,2
Light gathering capacity Light gathering capacity X Light-gathering capacity of the telescope compared to the eye. Click to read more...	1900
Max. useful magnification Max. useful magnification X The telescope’s magnification should not exceed this factor, because otherwise the image will appear weak and dark. Click to read more...	610
Tube construction	Truss Tube Truss tube X In contrast to the solid tube, here the optical tube is constructed of rods. Click to read more...
Tube material	Aluminium
Reflector Reflector X Special characteristics which only reflectors possess, can be found under this heading. Click to read more...
Secondary mirror diameter (mm)	75
Ventilation for central mirror	yes
Adjustable	yes
Primary mirror - Diameter (mm)	305
Secondary mirror obstruction Secondary mirror obstruction X The shadow effect of the telescope optics due to the secondary mirror, because this lies in the optical path. Click to read more...	24
Focuser Focuser X A focuser is used to hold an eyepiece. The image can be focussed using the focus wheels on the side. Click to read more...
Type of build Type of build X There are basically two different construction types: the rack and pinion focuser and the Crayford focuser. Click to read more...	Gear rack
Connection ( to eyepiece) Connection ( to eyepiece) X Focusers are available in 1.25" or 2" formats. Many 2" focusers also have a 1.25" adapter. Click to read more...	2
Gear reduction	1:10 Fine movement
Mount Mount X A mount is the foundation of an astronomical telescope. It usually consists of the mount head and an appropriate tripod. Click to read more...
Type of build Type of build X Describes the exact construction of the particular mount and thereby further subdivides the different types of mount. Click to read more...	Dobson
Mounting type Mounting type X Are mainly differentiated between equatorial and altazimuth. A special type of altazimuth mount is the Dobsonian mount. Click to read more...	Dobson
GoTo control GoTo control X Object positioning system, available in real GoTo and also PushTo versions. Click to read more...	no
Tracking Tracking X This means the motorised tracking of an object. This can often be retrofitted. Click to read more...	no
Battery compartment	yes
Tripod Tripod X The tripod is a part of the mount, it provides a stable stand and is usually adjustable in height. Click to read more...
Material	Aluminium
Type	Rockerbox
Included accessories Included accessories X Many telescopes came with simple accessories. Click to read more...
Finder scope Finder scope X A mini telescope used to locate a celestial object. There are optical finders and red dot finders. Click to read more...	Red dot finder Red dot finder X A red LED dot is projected onto a disc. Click to read more...
stray light protection	no
Eyepiece adaptor	1,25" - 2"
Antiglare protector	yes
Battery compartment	yes
Extension tubes	yes
Counterweights (kg)	2x 1,0
General
Total weight (kg)	32,1
Series	Ultra Light Ultra Light X Lightweight truss tube Dobsonians that are optimised for transport. Click to read more...
Eyepiece height at zenith (mm)	1400
Area of application Area of application X The area of application will give you a broad overview of the purposes for which the telescope is suited. Click to read more...
Moon & Planets	yes
Nebulae & galaxies	yes
Nature Observation	no
Astrophotography	not recommended
Sun Sun X Telescopes for safe solar observing. Click to read more...	no
recommended for Recommended for... X The classification of the telescopes according to their suitability for beginners, advanced or observatories is useful as an initial orientation. Click to read more...
Beginners Beginners X Telescopes that are supplied as a complete system and are easy to operate. Click to read more...	no
Advanced Advanced X Telescopes for experienced observers, but also for ambitious beginners. Click to read more...	yes
Observatories Observatories X Telescopes suitable for a fixed mount, whether that is in the garden or an observatory. Click to read more...	no

Telescope accessories > Transport & storage
	Telegizmos T3-3D Protective cover for Dobsonian telescopes from 12" to 14"	$ 279.00*
	Omegon aluminium case, large	$ 49.90*
	Omegon Bumbag for eyepieces	$ 39.90*
	Omegon eyepiece case	$ 59.00*
	Omegon transport bag for accessories	$ 59.00*
	Oklop Carrying bag für Zubehör	$ 42.90*
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Telescope accessories > Other
	Explore Scientific Light Shroud 10" + 12" Ultra Light Dobson	$ 116.00*
	noctutec Dark adaptation glasses for astronomers	$ 46.90*
	Omegon Radiant Finder with fastener	$ 59.00*
	Omegon 2'' - 1.25'' Twist-lock adapter	$ 49.90*
	Omegon 2'' adapters with reducer 1.25 ''	$ 24.90*
	Omegon Binocular head Binoviewer 1.25''	$ 199.00*
	Omegon Newton adjusting laser 1,25'' (inspection window)	$ 59.00*
	Omegon collimation eyepiece	$ 49.90*
	Omegon Erecting lense 1,25"	$ 99.00*
	Omegon 2'', 2X premium Barlow lens	$ 249.00*
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Eyepieces
	Omegon LE Series Eyepiece, 12.5mm, 1.25''	$ 129.00*
	Omegon Eyepiece LE Planetary 9mm 1,25''	$ 99.00*
	Omegon Eyepiece LE Planetary 6mm 1,25''	$ 99.00*
	Omegon Eyepiece LE Planetary 5mm 1,25''	$ 99.00*
	Omegon Eyepiece LE Planetary 3mm 1,25"	$ 99.00*
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Eyepieces
	Omegon Ultra Wide Angle eyepiece 9mm 1,25"	$ 59.00*
	Omegon Ultra Wide Angle eyepiece 15mm 1,25"	$ 59.00*
	Omegon Ultra Wide Angle eyepiece 20mm 1,25"	$ 59.00*
	TeleVue Eyepiece Ethos 17mm 2"	$ 1,060.00*
	TeleVue Nagler Type 5 2" 31mm eyepiece	$ 940.00*
	Omegon Panorama II 2'', 21mm eyepiece	$ 229.00*
	Omegon Panorama II 2'', 15mm eyepiece	$ 229.00*
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Eyepieces > Other
	Omegon Illuminated crosshair eyepiece, 12.5mm	$ 79.00*
	Omegon eyepiece and accessories case, large	$ 219.00*
	Omegon Deluxe eyepiece case, optimised for focal lengths from 1200mm to 1800mm	$ 299.00*
	Omegon SWA 32mm, 2” eyepiece	$ 139.00*
	Omegon SWA 20mm eyepiece, 1.25”	$ 99.00*
	Omegon Flatfield ED eyepiece 12mm 1,25''	$ 119.00*
	Omegon Flatfield ED eyepiece 5mm 1,25''	$ 119.00*
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Filters > Moon filters & Polarizing filters
	Omegon Filters Variable grey filter 1.25"	$ 49.90*
	Omegon Filters 2'' Moon filter 25% Transmission	$ 24.90*
	Omegon Filters Variable Polarising Filter 2"	$ 69.00*
Filters > Nebulae filters
	Omegon Filters Nebula/ city light filter 1.25 ''	$ 49.90*
	Omegon Filters UHC Filter, 1.25“	$ 69.00*
	Omegon Filters OIII filter 1.25''	$ 69.00*
	Omegon Filters 1.25'' deep sky filter	$ 59.00*
	Omegon Filters 1.25'' Clear Sky filter	$ 99.00*
	Omegon Filters Light Pollution Filter, 2”	$ 59.00*
	Omegon Filters UHC Filter, 2"	$ 99.00*
	Omegon Filters OIII Filter 2"	$ 99.00*
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Filters > Other
	Omegon Filters Color filter set 1,25'' (6 pieces)	$ 59.00*
	Meade Filters Series 4000 Color Filter Set 1,25"	$ 84.00*
	Omegon 2'' filter wheel	$ 149.00*
Astrophotography > Camera mounts
	Omegon Easypic Universal Smartphone Adapter	$ 99.00*
	Omegon Universal digital camera adapter	$ 39.90*
	Baader Microstage II	$ 60.00*
	Omegon Universal digital camera adapter	$ 29.90*
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Astrophotography > Other
	Baader Adaptors Plug-in connection 2 " A/T-2a for putting into all 2 " Okularauszüge	$ 43.90*
Mountings & accessories
	Explore Scientific Counterweight set for Ultra Light Dobsonian, 2kg	$ 35.90*
Observatories
	Omegon Tent observatory	$ 179.00*
Media
	Omegon Star chart Planisphere	$ 14.90*
	Willmann-Bell Book Annals of the Deep Sky Volume 1	$ 36.90*
	Cambridge University Press Book Cosmic Challenge	$ 44.90*
Outdoor
	Omegon LED headlamp	$ 14.90*
	Omegon Astronomy torch Astro-Flashlight	$ 14.90*
Maintenance & Cleaning
	Omegon cleaning system	$ 8.90*
	Baader Lens Cleaning Pump Spray Optical Wonder 100ml	$ 15.90*
	Omegon microfibre cleaning cloth 20cm x 20cm	$ 5.90*
	Omegon SPUDZ microfaser cleaning cloth	$ 10.90*
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Miscellaneous > Face masks
	Masketo face mask with palm print 1 piece	$ 12.90*
	Masketo face mask with astronomy theme Solar Corona 1 piece	$ 12.90*
	Masketo face mask white with astronomy theme Pleiades 1 piece	$ 15.90*
	MYONE Face mask size L 1 piece	$ 4.90*
	Masketo Face mask polyester Corona Borealis	$ 14.90*
	Face mask KN95 10 pieces	$ 48.90*
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Solar Observation
	Baader Sun filter foil 500x1000mm	$ 92.00*