Skip to content

Astronomy Specialist

Search

Menu

BRANDS
TELESCOPES
- TELESCOPES
- ASTROGRAPHS
  
  CELESTRON
  
  OFFICINA STELLARE
  
  PLANEWAVE
  
  SHARPSTAR
  
  SKY-WATCHER
  
  TAKAHASHI
- BINOCULARS
  
  APM
  
  CELESTRON
- CASSEGRAIN
  
  BAADER
  
  CELESTRON
  
  SKY-WATCHER
- COMPUTERIZED
  
  CELESTRON
- DALL-KIRKHAM
  
  TAKAHASHI
  
  OFFICINA STELLARE
  
  PLANEWAVE
- DOBSONIAN
  
  GEOPTIK
  
  SKY-WATCHER
  
  OPTIQUES FULLUM
- NEWTONIAN
  
  ARTESKY
  
  GSO
  
  SAXON
  
  SKY-WATCHER
- REFRACTORS
  
  ASKAR
  
  APM
  
  TAKAHASHI
  
  SHARPSTAR
  
  SKY-WATCHER
  
  WILLIAM OPTICS
  
  ZWO
- RITCHEY-CHRETIEN
  
  GSO
  
  OFFICINA STELLARE
  
  PLANEWAVE
- SMART TELESCOPES
  
  UNISTELLAR
  
  ZWO SEESTAR
- SOLAR
  
  BAADER
  
  DAYSTAR
  
  SKY-WATCHER
- SPOTTING SCOPES
  
  CELESTRON
MOUNTS
CAMERAS
ACCESSORIES
OBSERVATORIES
SPECIALS
BLOG
ABOUT US
ENGINEERING

ACCESSORIES

(1112 products)

Sort by

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

Brand

Clear

Availability

In stock (857)
Out of stock (300)

Clear

Price

From $

-

To $

From To

Clear

Threads

Clear

Optical thickness

0 mm (1)
0.5 mm (1)
1.5 mm (1)
3 mm (1)
5 mm (1)
10 mm (2)
30 mm (1)
32 mm (1)
Optical thickness 7.3 mm (1)
Optical thickness: 0 mm (11)
Optical thickness: 0.1 mm (1)
Optical thickness: 0.15 mm (1)
Optical thickness: 0.15 - 1 mm (1)
Optical thickness: 0.2 mm (1)
Optical thickness: 0.3 mm (2)
Optical thickness: 0.4 mm (1)
Optical thickness: 0.5 mm (4)
Optical thickness: 0.5 - 13.5 mm (1)
Optical thickness: 0.6 mm (1)
Optical thickness: 0.7 mm (1)
Optical thickness: 0.8 mm (1)
Optical thickness: 1 mm (10)
Optical thickness: 1.5 mm (1)
Optical thickness: 2 mm (16)
Optical thickness: 2.5 mm (4)
Optical thickness: 3 mm (9)
Optical thickness: 3.5 mm (2)
Optical thickness: 4 mm (4)
Optical thickness: 4.3 mm (1)
Optical thickness: 4.5 mm (1)
Optical thickness: 5 mm (15)
Optical thickness: 5.5 mm (2)
Optical thickness: 6 mm (4)
Optical thickness: 6.5 mm (1)
Optical thickness: 7 mm (9)
Optical thickness: 7.5 mm (1)
Optical thickness: 8 mm (8)
Optical thickness: 8.3 mm (2)
Optical thickness: 8.5 mm (1)
Optical thickness: 9 mm (6)
Optical thickness: 9.5 mm (1)
Optical thickness: 9.50 - 10.25 mm (3)
Optical thickness: 9.7 mm (1)
Optical thickness: 9.75 - 10.50 mm (1)
Optical thickness: 10 mm (9)
Optical thickness: 10.5 mm (1)
Optical thickness: 10.6 mm (1)
Optical thickness: 10.8 mm (1)
Optical thickness: 11 mm (5)
Optical thickness: 11.4 mm (1)
Optical thickness: 11.5 mm (2)
Optical thickness: 12 mm (1)
Optical thickness: 12.5 mm (5)
Optical thickness: 12.7 mm (1)
Optical thickness: 13 mm (3)
Optical thickness: 13.5 mm (1)
Optical thickness: 14 mm (3)
Optical thickness: 14 mm, 20 mm (1)
Optical thickness: 15 mm (7)
Optical thickness: 15 - 18 mm (4)
Optical thickness: 15 - 20 mm (1)
Optical thickness: 16.2 mm (1)
Optical thickness: 16.5 mm (1)
Optical thickness: 17.5 mm (1)
Optical thickness: 18.8 mm (1)
Optical thickness: 19 mm (1)
Optical thickness: 20 mm (3)
Optical thickness: 21 mm (2)
Optical thickness: 22.5 mm (1)
Optical thickness: 25 mm (3)
Optical thickness: 26 mm (1)
Optical thickness: 26.5 mm (1)
Optical thickness: 28 mm (2)
Optical thickness: 29 mm (2)
Optical thickness: 29 - 35.5 mm (1)
Optical thickness: 31 mm (1)
Optical thickness: 31.3 mm (1)
Optical thickness: 34.5 mm (1)
Optical thickness: 35 mm (2)
Optical thickness: 37 mm (2)
Optical thickness: 38.5 mm (3)
Optical thickness: 39.5 mm (1)
Optical thickness: 40 mm (1)
Optical thickness: 41.5 mm (1)
Optical thickness: 48.5 mm (1)
Optical thickness: 50 mm (2)
Optical thickness: 52 mm (1)
Optical thickness: 53 mm (1)
Optical thickness: 55 mm, 59 mm (1)
Optical thickness: 64 mm (1)
Optical thickness: 65 mm (1)
Optical thickness: 85 mm (1)
Optical thickness: 99 mm (1)
Optical thickness: 99 mm (2" barrel) (1)
Optical thickness: 100 mm (1)
Optical thickness: 109 mm (1.25" barrel) (1)
Optical thickness: 112 mm (2)
Optical thickness: 121 mm (2" barrel) (1)
Optical thickness: 131 mm (1.25" barrel) (1)
Optical thickness: -65.5 mm (1)

Clear

Aperture

30 mm (1)
32 mm (2)
48 mm (1)
50 mm (1)
50mm (1)
60 mm (1)
61 mm (1)

Clear

Optical design

Achromatic Doublet (1)
Amici erecting prism (3)
Aspheric (2)
Barlow (7)
Doublet (6)
Flatfield Barlow (1)
Mirror diagonal (2)
Modular (10)
Orthoscopic (3)
Plössl (1)
Plössl, Orthoscopic, Barlow (1)
Prism star diagonal (2)
Telecentric Barlow (2)
TOE (6)
TPL (3)
Wide angle (6)

Clear

Focal length

Clear

Focal ratio

F4.1 (1)
f/3.75 (1)
f/4 (3)
f/5 (1)

Clear

Mount type

Alt-Azimuth (1)
Equatorial (1)

Clear

Payload capacity

5 kg (1)
80 kg (1)
200 kg (1)
13 kg with counterweight (1)
8 kg without counterweight (1)
≤2.5 Nm (5kg) (1)

Clear

Encoders

Encoders: None (2)

Clear

Counterweight shaft

16 mm (4)
18 mm (2)
20 mm (6)
25 mm (8)
28 mm (3)
30 mm (3)
31.5 mm (1)
32 mm (7)
38.1 mm (1)
40 mm (2)
50 mm (1)
60 mm (1)

Clear

Bit depth

12-bit (12)
14-bit (5)
16-bit (5)

Clear

Pixel size

1.45 µm (1)
2.0 µm (2)
2.9 µm (6)
3.75 µm (1)
3.76 µm (7)
4.0 µm (2)
4.63 µm (2)
5.94 µm (1)

Clear

Resolution

1280 x 960 (1)
1920 x 1080 (7)
3008 x 3008 (2)
3840 x 2160 (4)
4128 x 2808 (2)
6064 x 4040 (1)
6224 x 4168 (3)
9568 x 6380 (2)

Clear

Quantum efficiency

75% (1)
80% (8)
81% (2)
83% (2)
89% (2)
90% (2)
91% (3)
92% (2)

Clear

Sensor diagonal

6.14 mm (1)
6.39 mm (5)
6.45 mm (1)
8.47 mm (2)
8.81 mm (2)
12.84 mm (1)
15.97 mm (2)
23.1 mm (2)
28.3 mm (3)
43.3 mm (3)

Clear

FPS

6.2 FPS (2)
13.3 FPS (3)
15.2 FPS (1)
17.8 FPS (1)
18 FPS (2)
30 FPS (1)
33 FPS (2)
40 FPS (2)
47 FPS (4)
150 FPS (2)
152 FPS (2)

Clear

Filter size

1.25" (8)
2" (6)
31 mm (4)
36 mm (3)
46 mm (2)
50 mm x 50 mm square (1)
50 mm round (2)

Clear

Bandpass (FWHM)

3 nm (1)
3.5 nm (1)
7 nm (2)

Clear

Apparent FOV

40 - 60° (1)
44° (1)
48° (6)
48 - 68° (1)
50° (8)
52° (3)
56° (3)
58° (3)
60° (6)
65° (6)
66 - 67° (1)
68° (9)
70° (1)
72° (2)
75° (1)
76° (6)
80° (1)
82° (6)
84° (1)

Clear

Barrel size

1.25" (67)
2" (35)

Clear

Colour or Monochrome

Colour (11)
Monochrome (11)

Clear

Cooled

Cooled (11)
Non-cooled (11)

Clear

Compare

8% off

FLAT73A 1x FLATTENER FOR ZENITHSTAR 73

Sale price $369^00AUD Regular price $399⁰⁰

Contact Us
Compare

13% off

FLAT7A 0.8x REDUCER FOR FLT120, FLT132, FLT156

Sale price $1,049^00AUD Regular price $1,199⁰⁰

Contact Us
Compare

11% off

FLAT8 0.72x REDUCER FOR GT102, FLT132, FLT156

Sale price $1,289^00AUD Regular price $1,449⁰⁰

Contact Us
Compare

GEOPTIK 10KG COUNTERWEIGHT FOR AZ-EQ6
Very low stock (1 unit)

Regular price $249^00AUD

View details
Compare

GEOPTIK 10KG COUNTERWEIGHT FOR CGXL, CGE PRO, CGEM DX
Very low stock (1 unit)

Regular price $289^00AUD

View details
Compare

GEOPTIK 10KG COUNTERWEIGHT FOR EQ8, EQ8-R, EQ8-RH
Very low stock (1 unit)

Regular price $289^00AUD

View details
Compare

GEOPTIK 10KG COUNTERWEIGHT FOR G8, GM8, G9, G11
Very low stock (1 unit)

Regular price $289^00AUD

View details
Compare

GEOPTIK 1KG COUNTERWEIGHT FOR DOVETAILS

Regular price $59^00AUD

View details
Compare

GEOPTIK 1KG SLIDING COUNTERWEIGHT FOR SCT
In stock

Regular price $79^00AUD

View details
Compare

GEOPTIK 2.5kg COUNTERWEIGHT FOR CGXL, CGE PRO, CGEM DX

Regular price $229^00AUD

View details
Compare

GEOPTIK 3KG SLIDING COUNTERWEIGHT FOR SCT
In stock

Regular price $109^00AUD

View details
Compare

GEOPTIK 5KG COUNTERWEIGHT FOR AZ-EQ6

(1)

Regular price $199^00AUD

View details
Compare

GEOPTIK 5KG COUNTERWEIGHT FOR CGXL, CGE PRO, CGEM DX

Regular price $239^00AUD

View details
Compare

GEOPTIK 5KG COUNTERWEIGHT FOR EQ8, EQ8-R, EQ8-RH

Regular price $239^00AUD

View details
Compare

GEOPTIK 5KG COUNTERWEIGHT FOR G8, GM8, G9, G11

Regular price $239^00AUD

View details
Compare

GEOPTIK ADAPTER FROM CAMERA LENS TO CCD/CMOS
Very low stock (1 unit)

Regular price $209^00AUD

View details
Compare

GEOPTIK ADAPTER FROM LOSMANDY TO VIXEN BARS
Orange Black

Regular price $159^00AUD

View details
Compare

GEOPTIK ADJUSTABLE FEET FOR TRIPODS

Regular price $319^00AUD

View details
Compare

GEOPTIK BAG FOR 100mm REFRACTORS & SKYWATCHER TRIPODS

(4)

In stock

Regular price $139^00AUD

View details
Compare

GEOPTIK BAG FOR BINOPLUS
Very low stock (1 unit)

Regular price $169^00AUD

View details
Compare

GEOPTIK BAG FOR CELESTRON CPC 8"
In stock

Regular price $299^00AUD

View details
Compare

GEOPTIK BAG FOR CELESTRON CPC 9.25" & 11"

Regular price $329^00AUD

View details
Compare

GEOPTIK BAG FOR COUNTERWEIGHT

(1)

In stock

Regular price $49^00AUD

View details
Compare

GEOPTIK BAG FOR COUNTERWEIGHT WITH BAR
In stock

Regular price $69^00AUD

View details
Compare

GEOPTIK BAG FOR COUNTERWEIGHTS AND BAR
In stock

Regular price $119^00AUD

View details
Compare

GEOPTIK BAG FOR EQ5/LXD/GM8 WITH TRIPOD
Very low stock (1 unit)

Regular price $169^00AUD

View details
Compare

GEOPTIK BAG FOR EYEPIECES AND ACCESSORIES
In stock

Regular price $179^00AUD

View details
Compare

GEOPTIK BAG FOR FLAT FIELD GENERATORS

(1)

In stock

Regular price From $49^00AUD

View details
Compare

GEOPTIK BAG FOR HEQ5
In stock

Regular price $159^00AUD

View details
Compare

GEOPTIK BAG FOR HERCULES TRIPOD 47 - LOW VERSION
Very low stock (1 unit)

Regular price $169^00AUD

View details
Compare

GEOPTIK BAG FOR HERCULES TRIPOD 95
Very low stock (1 unit)

Regular price $189^00AUD

View details
Compare

GEOPTIK BAG FOR LX90/LX200 8"
In stock

Regular price $179^00AUD

View details
Compare

GEOPTIK BAG FOR NEWTONIAN 200 f/4

Regular price $169^00AUD

View details
Compare

GEOPTIK BAG FOR NEWTONIAN 200 f/5
Very low stock (1 unit)

Regular price $189^00AUD

View details
Compare

GEOPTIK BAG FOR NEWTONIAN 200 f/6

(1)

Very low stock (1 unit)

Regular price $189^00AUD

View details
Compare

GEOPTIK BAG FOR NEWTONIAN 250 f/5

Regular price $389^00AUD

View details
Compare

GEOPTIK BAG FOR NEWTONIAN 300 f/5
Very low stock (1 unit)

Regular price $399^00AUD

View details
Compare

GEOPTIK BAG FOR REFRACTOR 100mm f/7.5

(2)

In stock

Regular price $125^00AUD

View details
Compare

GEOPTIK BAG FOR REFRACTOR 150mm f/5

(1)

Very low stock (1 unit)

Regular price $159^00AUD

View details
Compare

GEOPTIK BAG FOR REFRACTOR 150mm f/8

Regular price $169^00AUD

View details
Compare

GEOPTIK BAG FOR SCHMIDT CASSEGRAIN OTA
In stock

Regular price From $199^00AUD

View details
Compare

GEOPTIK BAG FOR SHORT REFRACTORS
In stock

Regular price $99^00AUD

View details
Compare

GEOPTIK BAG FOR SMALL REFRACTORS AND TRIPODS
In stock

Regular price $119^00AUD

View details
Compare

GEOPTIK BAG FOR STAR ADVENTURER GTI
Very low stock (1 unit)

Regular price $149^00AUD

View details
Compare

GEOPTIK BUM BAG FOR ACCESSORIES
Very low stock (1 unit)

Regular price $99^00AUD

View details
Compare

GEOPTIK CONNECTION FLANGE FOR AZ-EQ6 & NEQ6
Orange Black
Very low stock (1 unit)

Regular price $89^00AUD

View details
Compare

GEOPTIK CONNECTION FLANGE FOR EQ6-R & EQ6
Orange Black
In stock

Regular price $89^00AUD

View details
Compare

GEOPTIK CONNECTION FLANGE FOR HEQ5
In stock

Regular price $89^00AUD

View details
Compare

GEOPTIK COUNTERWEIGHT BAR FOR NEQ6 & EQ6-R
In stock

Regular price $219^00AUD

View details
Compare

GEOPTIK COUNTERWEIGHT BAR FOR NEQ6 & EQ6-R 10kg
Very low stock (1 unit)

Regular price $449^00AUD

View details

Showing 500 of 1112

Your cart

Your cart is empty

Subtotal:$0^00AUD

Loading...

EXPLORE

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 10:00 - 17:30, Sat 10:00 - 14:00

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

Drop us an email

Facebook
YouTube
Instagram

Payment methods accepted

Country/Region

Australia (AUD $)

© 2025 Testar Australia.

Compare /15

Loading...

Loading...

Choose options

Item added to your cart.

View cart