Skip to content

Astronomy Specialist

Search

Menu

BRANDS
TELESCOPES
- TELESCOPES
- ASTROGRAPHS
  
  ASKAR
  
  CELESTRON
  
  PLANEWAVE
  
  SHARPSTAR
  
  SKY-WATCHER
  
  TAKAHASHI
- CASSEGRAIN
  
  BAADER
  
  CELESTRON
  
  SKY-WATCHER
- COMPUTERIZED
  
  CELESTRON
- DALL-KIRKHAM
  
  TAKAHASHI
  
  OFFICINA STELLARE
  
  PLANEWAVE CDK
  
  PLANEWAVE IRDK
- DOBSONIAN
  
  GEOPTIK
  
  SKY-WATCHER
  
  OPTIQUES FULLUM
- NEWTONIAN
  
  ARTESKY
  
  GSO
  
  SKY-WATCHER
- REFRACTORS
  
  ASKAR
  
  NAKOH
  
  TAKAHASHI
  
  SHARPSTAR
  
  SKY-WATCHER
  
  WILLIAM OPTICS
  
  ZWO
- RITCHEY-CHRETIEN
  
  GSO
  
  OFFICINA STELLARE
  
  PLANEWAVE
- SMART TELESCOPES
  
  DWARFLAB
  
  ZWO
- SOLAR
  
  BAADER
  
  DAYSTAR
  
  SKY-WATCHER
- SPOTTING SCOPES
  
  CELESTRON
BINOCULARS
- BINOCULARS
- BY SIZE
  
  UP TO 50MM
  
  70MM
  
  82MM
  
  100MM
  
  120MM
  
  150MM
- BY TYPE
  
  APO
  SEMI-APO
  
  ACHRO
- BY BRAND
  
  SKY ROVER
  
  WILLIAM OPTICS
MOUNTS
CAMERAS
ACCESSORIES
OBSERVATORIES
SPECIALS
TOOLS
ENGINEERING

CORRECTORS

(92 products)

We stock a comprehensive range of field flatteners, focal reducers, focal extenders and coma correctors to suit reflectors, refractors, Schmidt-Cassegrain, Ritchey-Chretien and more exotic optical designs.

Sort by

Featured
Most relevant
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Date, old to new
Date, new to old

Compare

View as List Grid

FiltersFilter & Sort

Applied Filters

Clear all

Sort by

Featured
Most relevant
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Date, old to new
Date, new to old

Availability

In stock (31)
Out of stock (61)

Clear

Brand

APM (4)
Askar (19)
Baader Planetarium (5)
Celestron (5)
NAKOH (2)
Optec (2)
PlaneWave (3)
Sharpstar (4)
Sky-Watcher (11)
Takahashi (19)
Teleskop Service (4)
Testar (4)
William Optics (7)
ZWO (3)

Clear

Price

From $

-

To $

From To

Clear

Threads

Clear

Optical thickness

Optical thickness: 3 mm (1)
Optical thickness: 7.5 mm (1)
Optical thickness: 11.4 mm (1)
Optical thickness: 50 mm (1)

Clear

Optical design

Flatfield Barlow (2)

Clear

Barrel size

2" (2)

Clear

Compare

SKYWATCHER FLATTENER & REDUCER FOR EVOLUX 82ED
Backordered

Regular price $499.00AUD
Compare

SKYWATCHER FLATTENER & REDUCER FOR 120ED
Backordered

Regular price $499.00AUD
Compare

SKYWATCHER FLATTENER & REDUCER FOR 72ED

(2)

Backordered

Regular price $499.00AUD
Compare

SKYWATCHER FLATTENER & REDUCER FOR 80ED

(1)

In stock

Regular price $499.00AUD
Compare

SKYWATCHER FLATTENER & REDUCER FOR 100ED
Backordered

Regular price $499.00AUD
Compare

Sold out

SKYWATCHER F/5 COMA CORRECTOR

Regular price $349.00AUD
Compare

SKYWATCHER F/4 APLANATIC COMA CORRECTOR

(2)

Very low stock (1 unit)

Regular price $599.00AUD
Compare

Sold out

TAKAHASHI FC/FS MULTI-FLATTENER 1.04x

Regular price $449.00AUD
Compare

TAKAHASHI REDUCER 0.72x FOR FS-60CB
Very low stock (1 unit)

Regular price $1,199.00AUD
Compare

TAKAHASHI 76RD REDUCER 0.73x
Very low stock (1 unit)

Regular price $1,049.00AUD
Compare

TAKAHASHI REDUCER-CR 0.73x
Backordered

Regular price $1,459.00AUD
Compare

TAKAHASHI MULTI-REDUCER 0.85x FOR FC/FS
Backordered

Regular price $1,049.00AUD
Compare

TAKAHASHI FC-35 REDUCER 0.66x
Backordered

Regular price $1,889.00AUD
Compare

TAKAHASHI REDUCER-QB 0.73x FOR FSQ-85EDX
Backordered

Regular price $1,249.00AUD
Compare

TAKAHASHI F/3 REDUCER FOR FSQ-106EDX4
Backordered

Regular price $3,399.00AUD
Compare

TAKAHASHI 645RD REDUCER FOR FSQ-106EDX4
Backordered

Regular price $4,899.00AUD
Compare

TAKAHASHI TOA-35 FLATTENER
Backordered

Regular price $969.00AUD
Compare

TAKAHASHI TOA-35 REDUCER
Very low stock (1 unit)

Regular price $2,259.00AUD
Compare

TAKAHASHI TOA-35 REDUCER FOR TSA-120 & TOA-150B
Backordered

Regular price $2,259.00AUD
Compare

TAKAHASHI TOA-645 FLATTENER FOR TOA-130
Backordered

Regular price $1,499.00AUD
Compare

TAKAHASHI TOA-645 FLATTENER FOR TOA-150B
Backordered

Regular price $1,599.00AUD
Compare

TAKAHASHI 645 SUPER REDUCER FOR CCA-250
Backordered

Regular price $4,499.00AUD
Compare

TAKAHASHI EXTENDER 1.5x FOR EPSILON 130ED
Backordered

Regular price $1,959.00AUD
Compare

TAKAHASHI EXTENDER 1.5x FOR EPSILON 160ED
Backordered

Regular price $1,879.00AUD
Compare

TAKAHASHI EXTENDER 1.5x FOR EPSILON 180ED
Backordered

Regular price $2,199.00AUD
Compare

TAKAHASHI EXTENDER ED 1.5x FOR FSQ-85, TSA, TOA
Backordered

Regular price $999.00AUD
Compare

TS OPTICS 2" 1x FLATTENER FOR RC
Very low stock (1 unit)

Regular price $449.00AUD
Compare

TS OPTICS M68 1x FLATTENER FOR RC
In stock

Regular price $799.00AUD
Compare

TS OPTICS 1x RICCARDI COMA CORRECTOR 3"
Backordered

Regular price $1,999.00AUD
Compare

Sold out

TS-OPTICS FOCAL REDUCER 0.5X - 2" FILTER THREAD

Regular price $149.00AUD
Compare

ZWO 0.75x REDUCER FOR FF65
Very low stock (1 unit)

Regular price $359.00AUD
Compare

ZWO 0.76x REDUCER FOR FF80
Backordered

Regular price $429.00AUD
Compare

ZWO 0.7x REDUCER FOR FF107 & FF130
Backordered

Regular price $599.00AUD
Compare

Sold out

ADAPTER M74 FEMALE - M63 FEMALE FOR RICCARDI REDUCER

Regular price $129.00AUD
Compare

Sold out

OPTEC LEPUS M48 CAMERA ADAPTER

Regular price $149.00AUD
Compare

TESTAR ADAPTER FOR ESATTO 3" & SHARPSTAR 2.5" REDUCER
Backordered

Regular price $99.00AUD
Compare

Sold out

TESTAR ADAPTER FOR GSO RC FOCUSER & SHARPSTAR REDUCER

Regular price $159.00AUD
Compare

WILLIAM OPTICS FLATTENER ADAPTER FOR FLT91, FLT120
Backordered

Regular price $79.00AUD
Compare

PLANEWAVE REDUCER 0.66X FOR CDK12.5 / 14 / 17
Backordered

Regular price $2,599.00AUD
Compare

PLANEWAVE REDUCER 0.66X FOR CDK20 / CDK24
Backordered

Regular price $2,599.00AUD
Compare

PLANEWAVE REDUCER 0.7X FOR CDK700
Backordered

Regular price $11,999.00AUD
Compare

TESTAR ADAPTER M72 - APM RIFLAT1 FLATTENER
Very low stock (1 unit)

Regular price $199.00AUD

Showing 92 of 92

Your cart

Your cart is empty

Subtotal:$0.00AUD

Loading...

EXPLORE

About Us
Blog
Terms of Service
Refund Policy
Shipping Policy
Privacy Policy
Quick Order

NEWSLETTER

Join our mailing list for updates, exclusive offers and astronomy news.

Email

CONTACT

Phone: 02 83281234

Mon - Fri 10:00am - 5:30pm

33/1-5 Thew Parade, Cromer, 2099, NSW Australia.

Drop us an email

Facebook
YouTube
Instagram

Payment methods accepted

© 2026 Testar Australia.

Compare /15

Loading...

Loading...