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

We use cookies and similar technologies to improve your experience, analyze traffic, and support our marketing efforts. Information may be collected by our analytics and advertising partners. By accepting cookies or continuing to the Site, you consent to cookies and information use under our Cookie Policy & Privacy Policy.

$100 Off Seestar S50 Pro! Ends in →

ZWO Holiday Sale: 10% Off Nearly Everything! → ZWO Holiday Sale: 10% Off Nearly Everything! →

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

Smart Telescopes

Solar Telescopes

Computerized Telescopes

Astrograph Telescopes

Spotting Telescopes

Telescope Bundles

Kids Telescopes

Astrophotography

Astrophotography View All

Cameras

Cameras View All

Deep Sky Cameras

Planetary Cameras

Mounts

Mounts View All

Harmonic EQ Mounts

Classic GoTo EQ Mounts

Counterweights & Balancing

Filters

Filters View All

Light Pollution Filters

Narrowband Filters

Broadband Filters

Planetary Filters

Specialty Filters

Optical Correctors

Optical Correctors View All

Field Flatteners

Coma Correctors

Barlows & Extenders

Imaging Accessories

Imaging Accessories View All

Smart Controllers

Guide Scopes & OAGs

Autofocusers & Focus Aids

Filter Drawers & Wheels

Camera Rotators

Adapters & Spacers

Collimation Tools

Smartphone Adapters

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

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 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 Binoculars

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

Smart Telescope Accessories

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

Sale

Shop Sales

Shop Sales View All

ZWO Holiday Sale

William Optics Holiday Sale

ZWO Seestar Sale

Celestron Holiday Sale

Sky-Watcher Holiday Sale

Explore Scientific Holiday Sale

Thousand Oaks Dew Heater Sale

ToupTek Summer Sale

Shop Clearance

Shop Clearance View All

Clearance Telescopes

Clearance Astrophotography

Clearance Mounts

Clearance Solar

Clearance Accessories

Brands

Baader Planetarium

AstroSuite ^NEW

Contact Us
Shipping FAQ
Returns & Exchanges
Help Center

Compare Products item items

Sign In Create an Account

Telescopes
Astrophotography
Mounts
Solar
Accessories
Sale
- Shop Sales
  
  ZWO Holiday Sale
  
  William Optics Holiday Sale
  
  ZWO Seestar Sale
  
  Celestron Holiday Sale
  
  Sky-Watcher Holiday Sale
  
  View All
- Shop Clearance
  
  Clearance Telescopes
  
  Clearance Astrophotography
  
  Clearance Mounts
  
  Clearance Solar
  
  Clearance Accessories

AstroSuite ^NEW

Brands

Featured Brands

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

Shopping Cart

Loading...

Nakoh

Filters (5)

clearance

best-seller

new

discontinued - mfg

coming-soon

Clear All

Sort by:

FILTER BY

Price

$

to

$

Stock

In Stock (4) items

Category

3D Astro Accessories 3D Astro Accessories (204) items

3D Astronomy 3D Astronomy (6) items

4026 Astronomy 4026 Astronomy (4) items

Agena Astro Agena Astro (392) items

Agena Hobby Supply Agena Hobby Supply (71) items

Airy Disk Airy Disk (2) items

Antares Antares (42) items

Antlia Filters Antlia Filters (142) items

Artesky Artesky (6) items

Askar Askar (112) items

AstroCell AstroCell (7) items

Astrodevice Astrodevice (2) items

Astrodymium Astrodymium (20) items

AstroGear AstroGear (3) items

Astronomik Astronomik (414) items

Baader Planetarium Baader Planetarium (742) items

Beamfist Beamfist (1) item

Berlebach Berlebach (109) items

Blue Fireball Blue Fireball (282) items

Bob's Knobs Bob's Knobs (69) items

Brandon / Vernonscope Brandon / Vernonscope (37) items

BST BST (22) items

BuckeyeStargazer BuckeyeStargazer (219) items

Celestial Teapot Designs Celestial Teapot Designs (1) item

Celestron Celestron (67) items

Chroma Technologies Chroma Technologies (147) items

Coronado Coronado (1) item

Cosmic Shards Cosmic Shards (5) items

David Chandler Company David Chandler Company (6) items

DayStar Filters DayStar Filters (46) items

Dew-Ninja Dew-Ninja (9) items

Dew-Not Dew-Not (20) items

DGM Optics DGM Optics (8) items

DwarfLab DwarfLab (10) items

EmCan EmCan (16) items

Explore Scientific Explore Scientific (86) items

Farpoint Astronomical Farpoint Astronomical (9) items

Feather Touch Feather Touch (1) item

Founder Optics Founder Optics (44) items

GSO GSO (218) items

HoTech HoTech (20) items

Houdini Telescopes Houdini Telescopes (6) items

Howie Glatter Howie Glatter (16) items

Hubble Optics Hubble Optics (1) item

IDAS Filters IDAS Filters (19) items

iOptron iOptron (224) items

Kasai Trading Co. Kasai Trading Co. (11) items

Kokusai Kohki Kokusai Kohki (12) items

Long Perng Long Perng (20) items

Lumicon Lumicon (1) item

Lunt Solar Systems Lunt Solar Systems (67) items

Machinza Astro Products Machinza Astro Products (1) item

Masuyama Masuyama (21) items

Meade Meade (9) items

Move Shoot Move Move Shoot Move (47) items

Nakoh Nakoh (4) items

nrStellar nrStellar (15) items

OCAL OCAL (1) item

Oculum-Verlag Oculum-Verlag (7) items

Optec Optec (27) items

Optolong Optolong (91) items

Pegasus Astro Pegasus Astro (194) items

Pentax Pentax (16) items

PlaneWave Instruments PlaneWave Instruments (47) items

PrimaLuceLab PrimaLuceLab (228) items

ProAstroGear ProAstroGear (1) item

QHYCCD QHYCCD (128) items

Radian Radian (1) item

Raf Camera Raf Camera (85) items

Revolution Imager Revolution Imager (18) items

Rigel Systems Rigel Systems (22) items

ROR ROR (2) items

Rouz Astro Rouz Astro (70) items

Sharpstar Sharpstar (16) items

Sky Rover Sky Rover (58) items

Sky Watcher Sky Watcher (87) items

Spectrum Optics Spectrum Optics (6) items

Spectrum Telescope Spectrum Telescope (95) items

Starfield Optics Starfield Optics (18) items

Starizona Starizona (17) items

Starlight Instruments Starlight Instruments (70) items

Steve Berardi Maps Steve Berardi Maps (1) item

STC STC (2) items

Takahashi Takahashi (118) items

Tele Vue Tele Vue (178) items

Telrad Telrad (20) items

Thousand Oaks Optical Thousand Oaks Optical (50) items

ToupTek Astro ToupTek Astro (137) items

Track the Stars Track the Stars (14) items

Unihedron Unihedron (18) items

Universal Astro Universal Astro (9) items

Vaonis Vaonis (19) items

Vixen Vixen (70) items

Wanderer Astro Wanderer Astro (89) items

WarpAstron WarpAstron (8) items

William Optics William Optics (175) items

ZWO ZWO (214) items

All Other All Other (17) items

Baader Planetarium Baader Planetarium (1) item

Customer Reviews

(3) items

& up (3) items

& up (3) items

Product Banner Type

best-seller (0) items

clearance (0) items

coming-soon (0) items

discontinued - mfg (0) items

new (4) items

Adapter Specifications

M48 (2" Filter) Thread - Male (2) items

Miscellaneous Thread - Male (2) items

Telescope Aperture

2.1 - 3" [76mm] (1) item

3.1 - 4" [102mm] (1) item

Experience Level

Beginner (1) item

Intermediate (1) item

Telescope Focal Length

301 - 400mm (1) item

501 - 600mm (1) item

Telescope Focal Ratio

f/5.1 - f/6 (1) item

f/6.1 - f/7 (1) item

Telescope Optical Design

Astrograph (1) item

Petzval (1) item

Telescope Series

Nakoh APO Astrograph (2) items

Telescope Mount Type

No Mount (OTA Only) (2) items

FILTER BY

Sort by:

On Sale

Nakoh 60GT f/6 Triplet Astrograph Bundle with Free Reducer and Flattener

Special Price $799.00 Regular Price $1,697.00

In Stock
New

Nakoh 92GX f/6.5 Quintuplet Petzval Flat‑Field Astrograph

$1,995.00

Out of Stock

Back-order
Nakoh 0.65x Reducer for 60GT Astrograph

$399.00

In Stock
Nakoh 1.0x Flattener for 60GT Astrograph

$299.00

In Stock

4 Items

Show:

24
48
72

Free Shipping

on orders over $50*

Easy 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

Agena Academy
Affiliate Program
Site Map
Discontinued Products

WHO WE ARE

About Us
Job Openings
Customer Reviews
Media Kit

Copyright © 2003-2026 Agena Astro. All rights reserved.

Terms of Use
Privacy Policy
Cookie Policy

Manage Cookie Preferences