The GSO 6" F5 reflector houses a big 150mm parabolic mirror with 80% more light grasp than a 4.5" mirror, for brighter, more detailed views of night sky curiosities. Of course, deep sky observations are also pleasing. The f/5 focal ratio also makes it convenient to photograph brighter deep sky objects such as galaxies, nebulas and star clusters.
The very high contrast leads to detail visibility near the physical limitations. Pinpoint stars over the entire field of view make observing galaxies and nebulae an aesthetic delight. GSO guarantees a difraction limited optic.
The 2" Crayford Focuser
Most instruments of this size only have a 1.25" focusers. This is OK for visual use, but limits photographical capability. The GSO Newtonian has a 2" Crayford focuser and sufficient back focus to be able to reach focus with DSLR cameras. With the supplied 2" extension tube you will also reach focus with regular eyepieces providing the best of both worlds. The extension tube, and both the 2” eyepiece holder and the 1.25” adapter use non-marring soft brass compression rings to hold eyepieces in place, rather than simple thumbscrews that can scratch your eyepiece barrels.
Parabolic Mirror
With a 6” (153mm) diameter, 750mm focal length, f/5 focal ratio. Parabolic mirror. The mirror is made of B270 “water white” optical crown glass that is free of internal stress and striae. B270 glass is equivalent to BK7 in performance and optical quality. The thermal stability of B270 glass is generally better than the soda lime float glass used for the mirrors of most reflectors in this reasonable price range. The mirror is ground and polished under computer control for guaranteed diffraction limited performance, coated with 94% reflectivity aluminum, and overcoated with a protective layer of silicon dioxide (quartz) for long life.
Ease of collimation
The GSO GS500 also allows you to calibrate your mirrors to obtain the highest quality images that the telescope mirror is capable of. Use a philips (cross-head) screw driver to keep both primary and secondary mirrors in alignment. Such screws makes it easy to get the best out of your GSO GS500 telescope which has great reputation for its best-in-class mirrors.
For the primary mirror, a fully adjustable 3-point flotation system metal cell holds the primary mirror. The open frame of the cell allows the mirror to cool down to ambient temperatures quickly, so you can start observing sooner. Large hand-tighten color-coded push-pull collimation and collimation lock knobs make it easy to collimate the primary mirror with no tools required.
Finderscope and bracket:
6 x 30mm straight through fully-multicoated dark crosshair achromatic design. The finder has a long and comfortable 13mm eye relief. It focuses by loosening the trim ring behind the objective lens cell, screwing the lens cell in or out to focus, and tightening the trim ring to lock in the correct focus. The finderscope mounts in a quick release bracket that slips into a pre-installed metal mounting shoe beside the focuser. The bracket is held in place in the mounting shoe by a single large hand-tighten chrome-plated knob that maintains the finder’s collimation, even if the finder is removed between observing sessions.. The bracket has two hand-adjust collimation screws that work in conjunction with a third spring-loaded post in the bracket. This makes collimation faster than the traditional three- or six-screw collimation methods used with conventional finder brackets.
Introducing iOptron’s new compact next-generation center-balance equatorial mounts the CEM26!
iOptron CEM26 quiet slewing at MAX speed of 6º/sec (ฟังความเงียบการทำงานที่ความเร็ว MAX 6º/sec):
Like their predecessors, the CEM26 is designed with portability in mind, weighing in at only 10 lbs it can support up to a 26lb payload an incredible 2.6 mount weight to payload ratio. The key to enable such ratios is the CEM design focuses the mount and payload weight directly on the center of the tripod rendering “natural stability”.
Building on the legacy of earlier CEM models we have added features for convenience and functionality. A positive lock gear engagement system (easy to use even when wearing gloves), Built-in Wi-Fi enabling unparallel connectivity and recordable permanent periodic error correction (PPEC) to repeat optimal PEC training sessions. Regarding functionality the CEM26 delivers precise pointing and accurate tracking. The CEM26 sets the new standard for compact equatorial mounts.
The center-balanced design mount puts the weight of the payload at the center of gravity allowing for greater natural stability. Other features include an adjustable counterweight bar to prevent obstruction with the tripod. And polar aligning is quick and accessible all the time since the polar scope is not blocked by the declination shaft.
The CEM26 is equipped with the latest advanced GOTONOVA® GOTO technology, making it one of the most powerful and accurate GOTO mounts available. Its database includes over 212,000+ objects. The Go2Nova® Hand Controller is intuitive to use and its large 4-line LCD screen simplifies the process of setting telescopes and locating objects.
The CEM26 mount either has an AccuAlignTM optical polar scope or an integrated electronic polar finder scope known as the iPolar (depending on option). iPolar ensures the accurate alignment of a telescope, even when the pole star is obscured.
iOptron iPolarTM - the smart electronic polarscope for everyone (Optional)
Fast and easy to use
High precision (30 arcsec)
No need to see the Pole Star
No need to rotate the mount during alignment
Unique imaging enhancement technique
Smart plate solving
On screen instruction during alignment
Capable under poor sky visibility condition
Shows polar alignment without seeing Polaris using iOptron iPolar:
Image quality of the fine parabolic optic:
This GSO Newtonian of course has a parabolic primary mirror for an optimum performance. GSO has a reputation for making some of the finest mirrors in this price range. We guarantee diffraction limited performance, but in our experience the GSO telescopes are even much better than that. One particular advantage is the very smooth mirror surface that results in practically no light scatter.
Moon and planets can be viewed even at 250x with very good sharpness and contrast. Tiny details in moon's craters become visible. You can see Saturn's Cassini division, belt details in Jupiter's atmosphere. With 150mm aperture a huge number of gas nebulae, star clusters and galaxies are within reach. Some galaxies even begin to unveil their spiral structure!
The GSO 6" f/5 newtonian is a good telescope for astrophotography:
The Newtonian Telescope is ready for astrophotography with many good features for beautiful astrophotos.
2" Crayford focuser with precise movement also suitable for heavy cameras
enough back focus for standard coma correctors
big illuminated field - good for standard DSLR cameras
94% encanced coating on main- and secondary mirror for a brighter image
Actual astrophotos taken from the GSO 6" F5
Credit: Astrobin
Other included accessories:
Two eyepieces: One 25mm and one 9mm fully multicoated high power 1.25” 52° field Plössl eyepieces. A 35mm extension tube for visual use. Can be expanded by adding more accessories (eyepieces, filters, barlows, astrophotography adapters, etc.). Can be expanded by adding more accessories (eyepieces, filters, barlows, astrophotography adapters, extension tubes, etc.)
GSO 6" F5 OTA SPECIFICATIONS
Best for viewing
Brighter deep sky
Best for imaging
Lunar & planetary
User level
Beginner/Imtermediate
Optical design
Reflector
Optical diameter
153mm (6")
Focal length
750mm
Focal ratio
f/5
Optics type
Parabolic
Eyepieces
9mm (1.25") and 25mm (1.25") eyepieces
Magnification with included eyepieces
30x and 83x
Resolving power
0.77arc*sec
Highest useful magnification
300x
Highest theoretical magnification
300x
Limiting stellar magnitude
13.6
Optical quality
Diffraction limited, 1/12 wave
Finder scope
6x30 fully multicoated achromatic
Focuser
2" Precision Crayford
Secondary mirror obstruction
52mm
Secondary mirror obstruction by diameter
34%
Secondary mirror obstruction by area
12%
Mirror coatings/over-coatings
Aluminum & Silicon Dioxide (Quartz)
Tube material
Steel
Length of optical tube
27 in. (690mm)
Weight, optical tube
13 lbs. (5.9kg)
CEM26 MOUNT SPECIFICATIONS
Mount
Center-Balanced Equatorial Mount
Payload *
26 lbs (12kg), exclude counterweight
Mount weight
10 lbs (4.5kg)
Payload/Mount weight
2.6
Structure Material
All metal, Casting + CNC machined
Exterior Finish
Powder coating
Periodic error (PE) **
<±10 arcsec
PEC
Yes, Permanent PEC
Worm period
600 sec
Right Ascension worm wheel
Φ88mm, 144 teeth aluminum
Declination worm wheel
Φ88mm, 144 teeth aluminum
Right Ascension axis shaft
Φ35mm steel
Declination axis shaft
Φ35mm steel
Right Ascension bearing
Φ55mm ball bearing
Declination bearing
Φ55mm ball bearing
Worm gears
Φ15.2mm, Brass
Motor drive
1.8º stepper motor, 128X microdivision
Resolution
0.17 arc seconds
Transmission
Synchronous belt
Latitude adjustment range
0º ~ 60º
Azimuth adjustment range
± 6º
Polar Scope
AccuAlignTM optical polar scope or iPolar (depends on option)
Level indicator
Level bubble
Hand Controller
Go2Nova® 8409 with ~212,000 objects database
Tracking
Automatic
Slew speed
1×,2×,8×,16×,64×,128×,256×,512×,MAX(6º/sec)
Power consumption
0.5A(Tracking), 0.8A(GOTO)
Power requiremention
12V DC, 5A
AC adapter
100V ~ 240V (included)
Power-down memory
Yes
Wi-Fi
Built-in
Communication port
Yes (Wi-Fi and USB)
Autoguide port
Yes (ST-4 compatible)
Firmware upgrade
Yes
PC computer control
Yes (ASCOM)
Counterweight shaft
Φ20X306mm (M16), Stainless Steel
Counterweight
10 lbs (4.5kg)
Tripod
1.5" (5kg) or LiteRoc 1.75" (7.5kg) heavy duty stainless steel
Dovetail saddle
3.8" Vixen-style, center adjustable
GPS
Optional external 32-channel GPS
Autoguiding
Optional external iGuider 1
Operation temperature
-10ºC ~ 40ºC
Warranty
Two year limited
* OTA size and length dependent ** Measured with encoder, 10 minutes
The Levenhuk M130 BASE Digital Camera makes your microscope a modern digital device. With its help, you can save all of the interesting moments of your observations: make photos of the microscope samples or even record a video of the whole observing process. Levenhuk M130 BASE camera is irreplaceable during lectures and presentations – you can display everything that is happening under the microscope objective on a big screen in real time.
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