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ThaiExcite
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URL: http://www.thaiexcite.com/GSO-6-f-6-Reflector-OTA-2-Crayford-Focuser-with-1.25-adapter-GS530-SKU8304-06F5-1.html

กล้องดูดาวสะท้อน GSO 6" f/6 Reflector OTA, Crayford Focuser 2" พร้อมตัวแปลง 1.25" adapter GS530

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ผู้ผลิต
GSO
จำนวนในสต๊อก
เหลือ 2 ชิ้น
น้ำหนัก
12,000.00 g
ราคาของเรา
฿11,990.00

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กล้องดูดาวสะท้อน GSO 6" f/6 Reflector OTA, Crayford Focuser 2" พร้อมตัวแปลง 1.25" adapter GS530

โปรดทราบ:  กล้องสะท้อนแสงในราคาใกล้เคียงมักใช้ฟอกัสเซอร์ Rack and Pinion (R&P) ซึ่งถูกกว่าและไม่แข็งแรง และรองรับแต่ Eyepiece ขนาด 1.25" เท่านั้น และไม่สามารถฟอกัสได้เมื่อนำกล้องถ่ายรูปมาต่อ ทำให้ไม่สามารถถ่ายภาพดาราศาสตร์ได้  กล้องรุ่นสะท้อนของ GSO อาจเป็นกล้องเพียงไม่กี่รุ่นในตลาดที่ใช้ทั้งฟอกัสเซอร์แบบ Crayford ขนาด 2" และรองรับการถ่ายภาพดาราศาสตร์และดูดาวในตัวเดียวกัน ในราคาที่ต่ำพอจะเป็นเจ้าของได้

 

GSO GS530 6-inch f6 Reflector Telescope OTA

 

The GSO GS530 houses a big 153mm 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/6 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

 GSO Crayford Focusers Reflectors 2"

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, 918mm focal length, f/6 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.

 

 กล้องดูดาวสะท้อน GSO GS680 8-inch Dobsonian primary mirror

 

Ease of collimation

The GSO GS530 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 GS530 telescope which has great reputation for its best-in-class mirrors.

 

GSO GS530 6-inch f6 Reflector Telescope OTA

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:

GSO 6x30 finderscope

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.

 

Image quality of the fine parabolic optic:

GSO GS500 6-inch f5 Reflector telescope 2-inch crayford focuser

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/6 newtonian is a good telescope for astrophotography:

GSO GS500 6-inch f5 Reflector telescope with camera attached

 

The Newtonian Telescope is ready for astrophotography with many good features for beautiful astrophotos.

 

Other supported accessories:

Can be expanded by adding more accessories (eyepieces, filters, barlows, astrophotography adapters, extension tubes, etc.)  

 

Specifications

Best for viewing Brighter deep sky
Best for imaging Lunar & planetary
User level Beginner 
Optical design Reflector
Optical diameter 153mm
Focal length 918mm
Focal ratio f/6
Optics type Parabolic
Resolving power 0.77arc*sec
Lowest useful magnification 21x
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
Tripod material Wood
Length of optical tube 34 in. (860mm)
Weight, optical tube 18 lbs. (8kg)
Warranty One year

 

What's in the box:

 

GSO is a leader in optical telescopes and accessories and their products have been sold for years by the "Big Three" (Meade, Celestron and Orion) under their own brand names. GSO telescopes and accessories are also sold under different names world-wide; Zhumell (USA), Apertura (USA), TPO (USA), Teleskop Service (Germany), Sky Optic (France), Antares (Canada), Astronz (New Zealand), and more than a dozen more brands too many to name. GSO is known for their high consistency in quality control, low defect rate, and their Taiwanese-based manufacturing scores closer to Japan in quality than other telescope manufacturers which mostly manfacture thier scopes in Mainland China. Give these telescopes a try - you will not be disappointed!