ThaiExcite

ThaiExcite
88/41 Kanlapapruek Road, Bangkae, Bangkae, 10160, Bangkok, ประเทศไทย
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URL: http://www.thaiexcite.com/GSO-8-f-8-Ritchey-Chretien-Astrograph-Telescope-Carbon-OTA-with-2-Dual-speed-Linearing-Bearing-Crayford-Focuser.html


กล้องดูดาว GSO 8" f/8 Ritchey-Chretien Astrograph Telescope OTA พร้อม Dual-speed Linear Bearing Crayford Focuser 2" รุ่น Carbon Fiber


รายละเอียด


คะแนนสินค้า
ผู้ผลิต
จำนวนในสต๊อก
สินค้าหมด
น้ำหนัก
11,000.00 g
ราคาของเรา
฿54,990.00


รายละเอียด


กล้องดูดาว GSO 8" f/8 Ritchey-Chretien Astrograph Telescope OTA พร้อม Dual-speed Linearing Bearing Crayford Focuser 2" รุ่น Carbon Fiber

 

      GSO 8-inch Ritchey-Chretien Astrograph OTA Carbon

 

โปรดทราบ: 
- กล้อง Orion 8" RC ในวีดีโอรุ่นนี้ผลิตโดย GSO เช่นกัน ซื้อเวอร์ชั่น GSO เองที่ไม่มีโลโก Orion จะช่วยคุณประหยัดไปได้เป็นหมื่นบาททีเดียว!
- รุ่นในหน้าสินค้านี้เป็นแบบ Carbon Fiber ซึ่งมีคุณสมบัติดีรุ่นกว่าในวีดีโอ สามารถอ่านรายละเอียดสินค้าได้ด้านบน หรือสเปคด้านล่าง

 

Capture exceptional images of night sky wonders with the GSO 8" Ritchey-Chrétien Astrograph. This true astrograph is optimized for astrophotographic use with APS-C and 35mm CCD cameras and DSLRs. With several key advantages over Schmidt-Cassegrains and other imaging telescopes, this 8" Ritchey-Chrétien, or "RC", is a remarkable telescope that delivers amazing, flat-field images which are virtually coma-free to the edge of the fully illuminated field.

 

        GSO 8-inch Ritchey-Chretien Astrograph OTA Carbon Back

 

This 8" (203mm) aperture RC combines the highly regarded Ritchey-Chrétien optical design with excellent light-gathering capability, high-end features, and durable construction to provide astrophotographers with an exceptional instrument at an amazing value. Unlike conventional Newtonian reflector and Schmidt-Cassegrain designs that are susceptible to coma away from the center of the field, the GSO 8" Ritchey-Chrétien Astrograph optical tube utilizes hyperbolic primary and secondary mirrors, made of low-expansion quartz glass, to achieve wonderfully flat-field images that are virtually devoid of coma with pinpoint star clarity. Plus, since there are no lenses in an RC telescope, captured images are delightfully free of chromatic aberrations for true-color performance.

 

GSO 8-inch Ritchey-Chretien Astrograph OTA Back

 

The optical tube assembly of the GSO 8” RC Telescope is made of low expansion, lightweight carbon fiber. The finish looks great, and this OTA will cool down nicely due to the properties of the carbon fiber, and it has great strength for its weight. The carbon fiber GSO 8" Ritchey-Chrétien optical tube is fortified with 9 internal, computer-positioned knife-edge light baffles; and both the primary mirror tube and secondary mirror light shield are highly baffled to ensure maximum image contrast for bright images rich in detail. Unlike Schmidt-Cassegrains, the primary mirror of the 8" Ritchey-Chrétien telescope is fixed in-place to eliminate annoying "image shift" that can wreak havoc during imaging sessions. Enhanced aluminium coatings on both the primary and secondary mirrors of the 8" Ritchey-Chrétien Astrograph provide 96% reflectivity with a protective quartz overcoat. Designed with collimation in mind, the secondary mirror of the 8" RC is precisely center-marked to facilitate collimation adjustments should they become necessary.

               

GSO 8-inch Ritchey-Chretien Astrograph OTA focuser White

 

The GSO 8" RC Astrograph features a machined, dual-speed (10:1) Crayford focuser equipped with a sturdy linear-bearing mechanism for enhanced rigidity and stable support of heavy astrophotography equipment. The rock-solid focuser provides 140.7mm of backfocus travel (238.1mm from the rear cell) to easily accommodate imaging accessory trains, and an engraved millimeter scale on the drawtube enables easy focus point repeatability. One 2" and two 1" machined focus extension rings are included so you can adjust focus position for various imaging cameras and accessories. A dovetail finder scope base allows easy installation of optional Mini Guide Scopes and aiming devices (sold separately). The 8" Ritchey-Chrétien tips the scales at 18.5 lbs. and is equipped with a wide "Losmandy-style" dovetail bar along its underside for easy attachment to large equatorial mounts. A unique, narrow dovetail bar along the top of the telescope allows easy attachment of optional guide scopes and other imaging accessories.

 

 GSO 8-inch Ritchey-Chretien Astrograph focus extension rings

 

The GSO 8" f/8 Ritchey-Chrétien is a good telescope for astrophotography

 

The GSO 8" f/8 Ritchey-Chrétien (RC6) is ready for astrophotography with many good features for beautiful astrophotos.

 

Actual astrophotos taken from the GSO 8" f/8 Ritchey-Chrétien (RC8)

GSO 8-inch RC8 astrophotos
Credit: Astrobin

 

SPECIFICATIONS

Best for viewing Deep sky
Best for imaging Deep Sky
User level Advanced
Optical design Ritchey-Chretien
Optical diameter 203mm
Focal length 1600mm
Focal ratio f/8.0
Optics type Hyperbolic
Eyepieces None
Resolving power 0.58arc*sec
Lowest useful magnification 29x
Highest useful magnification 236x
Highest theoretical magnification 400x
Limiting stellar magnitude 14.2
Optical quality Diffraction limited
Finder scope None
Focuser 2" Dual-Speed Linear bearing Crayford
Secondary mirror obstruction 95mm
Secondary mirror obstruction by diameter 47%
Secondary mirror obstruction by area 22%
Mirror coatings/over-coatings  Multi-coated with 99% Dielectric Coatings & Low Thermal Expansion Quartz
Mount type OTA without mount
Tube material Carbon Fiber
Length of optical tube 21.8 in. (554mm)
Weight, optical tube 16.4 lbs. (7.4kg)
Additional included accessories 2" to 1.25" adapter, extension tube rings for achieving focus with different accessory configurations
Warranty One year
 

 

 

SUPPORT DOCUMENTS

คู่มือ: 
GSO Ritchey-Chretien Telescope Manual (written by Orion)
GSO Ritchey-Chretien Telescope Manual (written by iOptron)

หมายเหตุ:
- กระบอก iOptron และ Orion ตามคู่มือผลิตโดยโรงงาน GSO ต่างกันเพียงแค่สี โลโก และ Orion มี dovetail เพิ่มเติมบนกระบอก ส่วนสเปคและอุปกรณ์เสริมเหมือนกันทุกประการ
- คู่มือเป็นของ Orion/iOptron สำหรับ RC series รวมทุกขนาด จึงอาจมีรายละเอียดที่เป็นเฉพาะของแต่ละขนาด ดูรายละเอียดได้จากหน้า spec sheet ในคู่มือ

GSO 8-inch Ritchey-Chretien Astrograph OTA box size

 

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!