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

DIAGONALS & PRISMS

(12 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

Baader Planetarium (9)
William Optics (3)

Clear

Availability

In stock (8)
Out of stock (4)

Clear

Price

From $

-

To $

From To

Clear

Threads

1.25" barrel (2)
1.25" Barrel (1)
2" barrel (5)
2" Barrel (1)
2" SC Female (1)
M42 x 0.75 Female (2)
M42 x 0.75 Male (2)
M48 x 0.75 Female (5)
M55 (3)
S58 dovetail (3)

Clear

Optical thickness

32 mm (1)
Optical thickness: 64 mm (1)
Optical thickness: 85 mm (1)
Optical thickness: 99 mm (1)
Optical thickness: 99 mm (2" barrel) (1)
Optical thickness: 109 mm (1.25" barrel) (1)
Optical thickness: 112 mm (1)
Optical thickness: 121 mm (2" barrel) (1)
Optical thickness: 131 mm (1.25" barrel) (1)

Clear

Optical design

Amici erecting prism (3)
Mirror diagonal (1)
Prism star diagonal (1)

Clear

Barrel size

1.25" (2)
2" (3)

Clear

Compare

BAADER 1.25" AMICI ERECTING PRISM 45°

(1)

Regular price $149^00AUD

View details
Compare

BAADER 1.25" T2 PRISM DIAGONAL 32mm #1C
In stock

Regular price $189^00AUD

View details
Compare

BAADER 1.25" T2 PRISM DIAGONAL 32mm

(2)

Very low stock (1 unit)

Regular price $239^00AUD

View details
Compare

BAADER 2" CLICKLOCK DIELECTRIC DIAGONAL

(1)

Regular price $519^00AUD

View details
Compare

New arrival

BAADER 2" CLICKLOCK BBHS ADJUSTABLE MIRROR DIAGONAL

Regular price $819^00AUD

View details
Compare

New arrival

BAADER 2" CLICKLOCK BBHS ADJUSTABLE PRISM DIAGONAL

Regular price $919^00AUD

View details
Compare

BAADER 2" AMICI ERECTING PRISM 45°
In stock

Regular price $419^00AUD

View details
Compare

BAADER 2" AMICI ERECTING PRISM 90°
In stock

Regular price $509^00AUD

View details
Compare

BAADER 2" CLICKLOCK BBHS ASTRO-AMICI PRISM

(1)

In stock

Regular price $1,169^00AUD

View details
Compare

12% off

WILLIAM OPTICS 1.25" 90° ERECTING PRISM

(1)

In stock

Sale price $149^00AUD Regular price $169⁰⁰

View details
Compare

9% off

DURA-BRIGHT 1.25" DIELECTRIC 90° DIAGONAL
Very low stock (1 unit)

Sale price $199^00AUD Regular price $219⁰⁰

View details
Compare

13% off

DURA-BRIGHT 2" DIELECTRIC 90° DIAGONAL

(1)

In stock

Sale price $259^00AUD Regular price $299⁰⁰

View details

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