JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

Skip to Content

Shop

Telescopes

Telescopes View All

Popular Telescopes

Popular Telescopes View All

Smart Telescopes

Beginner Telescopes

Astrophotography Telescopes

Refractor Telescopes

Dobsonian Telescopes

Refractor Telescopes

Refractor Telescopes View All

Petzval Telescopes

Triplet Telescopes

Doublet Telescopes

Reflector Telescopes

Reflector Telescopes View All

Dobsonian Telescopes

Newtonian Telescopes

Ritchey-Chretien Telescopes

Cassegrain Telescopes

Catadioptric Telescopes

Catadioptric Telescopes View All

RASA Telescopes

Maksutov Telescopes

More Telescopes

More Telescopes View All

Solar Telescopes

Computerized Telescopes

Astrograph Telescopes

Spotting Telescopes

Telescope Bundles

Smart Telescopes

Astrophotography

Astrophotography View All

Cameras

Cameras View All

Deep Sky Cameras

Planetary Cameras

Mounts

Filters

Filters View All

Light Pollution Filters

Narrowband Filters

Planetary Filters

Specialty Filters

Color Correction & Minus Violet Filters

ND & Polarizing Filters

Skylight & Protective Filters

Optical Correctors

Imaging Accessories

Imaging Accessories View All

Filter Drawers & Wheels

Camera Rotators

Adapters & Spacers

Collimation & Focusing Tools

Mounts

Mounts View All

Equatorial Mounts

Equatorial Mounts View All

Harmonic EQ Mounts

Classic GoTo EQ Mounts

Alt-Azimuth Mounts

Alt-Azimuth Mounts View All

GoTo Alt-Az Mounts

Manual Alt-Az Mounts

Telescope Mounts

Telescope Mounts View All

Mount Accessories

Mount Accessories View All

Telescope Tripods

Counterweights & Balancing

Dovetail Saddles & Clamps

Polar Scopes & Tools

Equatorial Wedges

Hand Controllers & Electronics

Screws, Knobs, & Hardware

Vibration Suppression

Miscellaneous Mount Accessories

Mounting Hardware & Solutions

Mounting Hardware & Solutions View All

Dovetail Bars/Rails

Dovetail Clamps

Hybrid Mounting Solutions

Solar

Solar Telescopes

Solar Telescopes View All

H-Alpha Telescopes

White Light Telescopes

Solar Binoculars

Solar Filters

Solar Filters View All

Solar Film Sheets

Ready-to-Use Telescope Solar Filters

Other Polymer Film Filters

Camera Lens Solar Filters

Herschel Wedges

H-Alpha Filters

Calcium H & K Filters

Other Specialty Filters

Solar Accessories

Solar Accessories View All

Solar Glasses & Viewers

Eyepieces & Barlows

Miscellaneous Accessories

Accessories

Accessories View All

Telescope Accessories

Telescope Accessories View All

Field Flatteners

Coma Correctors

Barlows & Extenders

Telescope Focusers

Focuser Accessories

Dew Prevention & Control

Finder & Guide Scope Accessories

Diagonals & Prisms

Eyepieces

Eyepieces View All

1.25" Eyepieces

Specialty Eyepieces

Imaging Eyepieces

Adapters

Adapters View All

0.965" Adapters

M54 Threaded Adapters

Baader UFC Adapters

Binocular Adapters

Camera / Imaging Adapters

Dust Covers / Seals

Eyepiece Adapters

Extension Tubes

Gender Changers

SCT Thread Adapters

Spacer Rings / Extenders

T-Thread Adapters

Webcam & Video Adapters

Miscellaneous Adapters

Binoculars & Accessories

Binoculars & Accessories View All

Standard Binoculars (Up to 50mm)

Large Binoculars (56mm-90mm)

Giant Binoculars (100mm & Larger)

Solar Binoculars

Binocular Accessories

More Accessories

More Accessories View All

Lights & Laser Pointers

Maps, Books & Software

Cleaning Supplies

Agena Astro Apparel & Merchandise

Miscellaneous Accessories

Power Adapters, Cables & Batteries

Dust Covers & Seals

Mirrors & Holders

Smart Telescope Accessories

Accessory Packages

Clearance

Clearance View All

Cameras

Eyepieces

Optical Accessories

Parts & Accessories

Telescopes

Binoculars

Sales & Special Offers

Sales & Special Offers View All

Celestron C-Suite EQ Promo

iOptron Mount Closeout Special Offer

Sky Watcher Mount Madness Sale

Sky-Watcher Refractor Sale

Contact/Visit Us
Shipping FAQ
Return Policy
Rewards Program
Privacy Policy
Customer Experience
Help

Compare Products item items

Sign In Create an Account

Telescopes
Astrophotography
Mounts
Solar
Accessories
Clearance
- Cameras Eyepieces Optical Accessories Parts & Accessories Telescopes Binoculars
Sales & Special Offers
- Celestron C-Suite EQ Promo iOptron Mount Closeout Special Offer Sky Watcher Mount Madness Sale Sky-Watcher Refractor Sale

Over 30k 5-star reviews
Free shipping over $50*
Easy 30-day returns

Shopping Cart

Loading...

Shopping by Brand

Category 3D Astro Accessories image

3D Astro Accessories

Category 3D Astronomy image

Category 4026 Astronomy image

Category Agena Astro image

Category Agena Hobby Supply image

Agena Hobby Supply

Category Airy Disk image

Category American Paper Optics image

American Paper Optics

Category Antares image

Category Antlia Filters image

Category Artesky image

Category Askar image

Category AstroCell image

Category Astrodevice image

Category Astrodymium image

Category AstroGear image

Category Astronomik image

Category Baader Planetarium image

Baader Planetarium

Category Beamfist image

Category Berlebach image

Category Blue Fireball image

Category Bob's Knobs image

Category Brandon / Vernonscope image

Brandon / Vernonscope

Category BST image

Category BuckeyeStargazer image

BuckeyeStargazer

Category Celestial Teapot Designs image

Celestial Teapot Designs

Category Celestron image

Category Chroma Technologies image

Chroma Technologies

Category Coronado image

Category Cosmic Shards image

Category David Chandler Company image

David Chandler Company

Category DayStar Filters image

DayStar Filters

Category Dew-Ninja image

Category Dew-Not image

Category DGM Optics image

Category DwarfLab image

Category Explore Scientific image

Explore Scientific

Category Farpoint Astronomical image

Farpoint Astronomical

Category Founder Optics image

Category GSO image

Category HoTech image

Category Houdini Telescopes image

Houdini Telescopes

Category Howie Glatter image

Category Hubble Optics image

Category IDAS Filters image

Category iOptron image

Category Kasai Trading Co. image

Kasai Trading Co.

Category Kokusai Kohki image

Category Levenhuk image

Category Long Perng image

Category Lunt Solar Systems image

Lunt Solar Systems

Category Machinza Astro Products image

Machinza Astro Products

Category Masuyama image

Category Meade image

Category Move Shoot Move image

Move Shoot Move

Category Nikon image

Category nrStellar image

Category OCAL image

Category Oculum-Verlag image

Category OGMA image

Category Optolong image

Category Pegasus Astro image

Category Pentax image

Category PlaneWave Instruments image

PlaneWave Instruments

Category PrimaLuceLab image

Category QHYCCD image

Category Radian image

Category Raf Camera image

Category Revolution Imager image

Revolution Imager

Category Rigel Systems image

Category ROR image

Category Rouz Astro image

Category Sharpstar image

Category Sky & Telescope image

Sky & Telescope

Category Sky Rover image

Category Sky Watcher image

Category Spectrum Optics image

Spectrum Optics

Category Spectrum Telescopes image

Spectrum Telescopes

Category Starfield image

Category Starlight Instruments image

Starlight Instruments

Category STC image

Category Takahashi image

Category Tele Vue image

Category Telrad image

Category Thousand Oaks Optical image

Thousand Oaks Optical

Category Track the Stars image

Track the Stars

Category Unihedron image

Category Universal Astro image

Universal Astro

Category Vaonis image

Category Vixen Optics image

Category Wanderer Astro image

Category WarpAstron image

Category William Optics image

Category ZWO image

Category All Other image

Filters (3)

GSO Ritchey-Chrétien

Intermediate

In Stock

Clear All

Sort by:

FILTER BY

Stock

In Stock (1) item
Out of Stock (3) items

Telescope Series

Askar F (1) item
Celestron Advanced VX (10) items
Celestron CGE (14) items
Celestron CGEM HD (4) items
Celestron CGEM II (4) items
Celestron CGEM II HD (3) items
Celestron CGX (7) items
Celestron CGX-L (4) items
Celestron NexStar Evolution (4) items
Celestron NexStar SE (4) items
Celestron RASA (2) items
Celestron StarSense Explorer (3) items
DayStar (2) items
GSO Cassegrain (5) items
GSO Imaging Newtonian (1) item
GSO Ritchey-Chrétien (1) item
Lunt MT (13) items
Sky Watcher Flextube Dobsonian (3) items
Sky Watcher Esprit APO (1) item
Sky Watcher EvoStar (3) items
Sky Watcher Flextube SynScan Dobsonian (5) items
Sky Watcher Maksutov (3) items
Sky Watcher Quattro (3) items
Spectrum Optical Dobsonian (3) items
Takahashi FC (6) items
Takahashi FCT (1) item
Takahashi FS (3) items
Takahashi FSQ (1) item
Takahashi Mewlon (2) items
Takahashi TOA (2) items
Takahashi TS (2) items
William Optics GT (8) items
William Optics RedCat (3) items
William Optics Pleiades (2) items
William Optics Zenith Star (1) item

Experience Level

Beginner (1) item
Intermediate (1) item

FILTER BY

Sort by:

GSO 10" f/8 Ritchey-Chretien Astrograph Telescope - Steel OTA (Black)

$2,699.00

In Stock

Added: 19-Oct-24

1 Item

Show:

24
48
72

Free Shipping

on orders over $10*

30 Days Returns

from day of receipt

Live Inventory

for all products

Sign up for Agena Astro emails

Be first to know about sales, new astro gear & events

CONTACT

[email protected]

* Not A Retail Store *

13100 Alondra Blvd, Suite 106
Cerritos, CA 90703, USA

ACCOUNT

Log in
Create Account
Order Status
Order History
Wishlist

SUPPORT

Contact Us
Ordering FAQ
Shipping & Delivery
Returns & Exchanges
International Orders
Coupons & Discounts

RESOURCES

Affiliate Program
Agena Academy
Site Map
Discontinued Products

WHO WE ARE

About Us
Job Openings
Customer Reviews
Media Kit

Copyright © 2003-%d Agena AstroProducts. All rights reserved.

Terms of Use
Privacy Policy
Cookie Policy