Extension tubes < Adaptors < Telescope accessories | ASTROSHOP

EN / $

✓ Europe's largest astronomy equipment retailer

✓ 7,500+ items available from stock

✓ Personal advice & service

Categories

Telescope accessories (1230)

Extension tubes (117)

Extension & reduction adaptors (194)

Other Adaptors (38)

Show main categories

Availability

short-term (117)

in stock (56)

long-term (8)

Select multiple items

Manufacturer

Artesky (14)

Askar (1)

ASToptics (11)

Baader (30)

Bresser (1)

Celestron (1)

Explore Scientific (1)

Gerd Neumann jr. (2)

GSO (1)

PrimaLuceLab (1)

TeleVue (8)

TS Optics (41)

Vixen (2)

ZWO (3)

Connection (to the telescope)

1,25" (3)

2" (13)

2,4" (3)

C-Mount (1)

M117 (2)

M43 (1)

M48 (17)

M54 (15)

M68 (8)

M90 (1)

S70 (1)

T2 (28)

Optical length

0,1 - 2,0 (3)

0,3 (4)

0,3, 0,5, 1 (1)

0,5 (4)

0,6 (1)

0,65 (1)

1 (4)

1,0 (3)

1,05 (1)

1,5 (3)

10 (5)

11 (1)

15 (6)

15 - 20 (2)

16,5 (1)

16-20 (1)

17 - 23 (1)

2 (1)

20 (2)

20,5 - 30 (1)

20,5 - 31 (1)

21 (1)

23,5 - 27 (1)

25 (2)

26 (1)

3 (3)

30 (3)

4 (1)

5 (7)

6 (1)

7 (2)

8 (4)

9 (1)

35 (1)

40 (3)

47 (1)

50 (3)

60 (1)

7,5 (5)

7,5 - 30 (1)

Connector (other end)

2" (1)

48mm (2)

75mm (2)

C-Mount (1)

M48 (14)

M54 (10)

M55 (4)

M63 (1)

M68 (4)

M75 (1)

T2 (15)

Female (1)

Price

< 60 $ (101)

60 - 120 $ (13)

120 - 170 $ (2)

170 - 230 $ (1)

Baader Extension tube T-2 intermediate ring 7.5 mm T-2i/T-2a

Baader

Extension tube T-2 intermediate ring 7.5 mm T-2i/T-2a

$ 25.90

ready for shipping in 1-2 weeks

ASToptics Extension tube M48 (2") fine tuning ring - 0.3mm (aluminium)

ASToptics

Extension tube M48 (2") fine tuning ring - 0.3mm (aluminium)

$ 11.90

ready for shipping in 1-2 weeks

ASToptics Extension tube T2 fine tuning ring - 1mm (aluminium)

ASToptics

Extension tube T2 fine tuning ring - 1mm (aluminium)

$ 11.90

ready for shipping in 1-2 weeks

Artesky Extension tube Adapter T2 - 1,25"

Artesky

Extension tube Adapter T2 - 1,25"

$ 30.90

ready for shipping in 3-5 weeks

ASToptics Extension tube T2 fine tuning ring - 2mm (aluminium)

ASToptics

Extension tube T2 fine tuning ring - 2mm (aluminium)

$ 11.90

ready for shipping in 1-2 weeks

ASToptics Extension tube T2 fine-tuning ring - 0.5mm (aluminium)

ASToptics

Extension tube T2 fine-tuning ring - 0.5mm (aluminium)

$ 11.90

ready for shipping in 1-2 weeks

ASToptics Extension tube M68 fine tuning ring - 0.5mm (aluminium)

ASToptics

Extension tube M68 fine tuning ring - 0.5mm (aluminium)

$ 13.90

ready for shipping in 1-2 weeks

TS Optics Extension tube M54 8mm

TS Optics

Extension tube M54 8mm

$ 45.90

ready for shipping in 3-7 days

TS Optics Extension tube Fine Tuning Ring for T2-thread - thickness 1.5 mm

TS Optics

Extension tube Fine Tuning Ring for T2-thread - thickness 1.5 mm

$ 17.90

ready for shipping in 3-7 days

TS Optics Extension tube M54 1.5mm

TS Optics

Extension tube M54 1.5mm

$ 19.90

ready for shipping in 1-2 weeks

TS Optics Extension tube T2 26mm extender

TS Optics

Extension tube T2 26mm extender

$ 25.90

ready for shipping in 3-7 days

Baader Extension tube Fine-tuning ring for M48 0.3mm

Baader

Extension tube Fine-tuning ring for M48 0.3mm

$ 16.90

ready for shipping in 1-2 weeks

TS Optics Extension tube, 2", 3mm

TS Optics

Extension tube, 2", 3mm

$ 34.90

ready for shipping in 3-7 days

TS Optics 2" extension tube with filter thread on both ends, 20mm optical path

TS Optics

2" extension tube with filter thread on both ends, 20mm optical path

$ 34.90

ready for shipping in 3-7 days

Baader Extension tube M48 30 mm 2"

Baader

Extension tube M48 30 mm 2"

$ 35.90

ready for shipping in 1-2 weeks

TS Optics Extension tube for RC telescopes with 6" and 8" apertures, 25mm

TS Optics

Extension tube for RC telescopes with 6" and 8" apertures, 25mm

$ 45.90

ready for shipping in 3-7 days

Bresser 2", 35mm extension tube

Bresser

2", 35mm extension tube

$ 33.90

Product can be shipped as of 13.10.2026

Askar Extension tube Adaptors M54/M48 16-20mm

Askar

Extension tube Adaptors M54/M48 16-20mm

$ 197.00

ready for shipping in 3-5 weeks

TS Optics Extension tube 23.5 - 27 mm M54

TS Optics

Extension tube 23.5 - 27 mm M54

$ 82.00

ready for shipping in 1-2 weeks

Baader Extension tube Fine-tuning ring for M48 1.0 mm

Baader

Extension tube Fine-tuning ring for M48 1.0 mm

$ 16.90

ready for shipping in 1-2 weeks

Artesky Extension tube T2 7mm

Artesky

Extension tube T2 7mm

$ 23.90

ready for shipping in 3-5 weeks

ASToptics Extension tube T2 fine tuning ring - 0.3mm (aluminium)

ASToptics

Extension tube T2 fine tuning ring - 0.3mm (aluminium)

$ 11.90

ready for shipping in 1-2 weeks

TeleVue Extension tube 2" extender

TeleVue

Extension tube 2" extender

$ 124.00

ready for shipping in 6-10 weeks

Baader Extension tube Fine-Adjustment Rings T2 1mm

Baader

Extension tube Fine-Adjustment Rings T2 1mm

$ 14.90

ready for shipping in 1-2 weeks

Baader Extension tube Fine-Adjustment Rings T2 0.3mm

Baader

Extension tube Fine-Adjustment Rings T2 0.3mm

$ 16.90

ready for shipping in 1-2 weeks

TeleVue 0.25" Length Accessory Tube for 2.4"

TeleVue

0.25" Length Accessory Tube for 2.4"

$ 58.00

ready for shipping in 6-10 weeks

Baader Extension tube 2" deluxe 60mm extender

Baader

Extension tube 2" deluxe 60mm extender

$ 86.00

ready for shipping in 1-2 weeks

TS Optics Extension tube Fine Tuning Ring for T2-thread - thickness 1.0mm

TS Optics

Extension tube Fine Tuning Ring for T2-thread - thickness 1.0mm

$ 17.90

ready for shipping in 3-7 days

TS Optics Extension tube Fine Tuning Ring for M48x0.75 thickness 1 mm

TS Optics

Extension tube Fine Tuning Ring for M48x0.75 thickness 1 mm

$ 17.90

ready for shipping in 3-7 days

TeleVue 0.375" Length Accessory Tube for 2.4"

TeleVue

0.375" Length Accessory Tube for 2.4"

$ 58.00

ready for shipping in 6-10 weeks

TS Optics Extension tube Fine-tuning ring for M48 0.3mm

TS Optics

Extension tube Fine-tuning ring for M48 0.3mm

$ 20.90

ready for shipping in 3-7 days

TS Optics Extension tube M68 extender, 8mm overall optical path

TS Optics

Extension tube M68 extender, 8mm overall optical path

$ 55.00

ready for shipping in 3-7 days

TeleVue 1.0" Length Accessory Tube for 2.4"

TeleVue

1.0" Length Accessory Tube for 2.4"

$ 58.00

ready for shipping in 6-10 weeks

ZWO Extension tube 21mm T2

ZWO

Extension tube 21mm T2

$ 40.90

ready for shipping in 3-5 weeks

Baader Hyperion SP54/SP54 extension ring (11mm optical length)

Baader

Hyperion SP54/SP54 extension ring (11mm optical length)

$ 27.90

ready for shipping in 1-2 weeks

TS Optics Extension tube for RC telescopes from 10" aperture, 25mm

TS Optics

Extension tube for RC telescopes from 10" aperture, 25mm

$ 69.00

ready for shipping in 3-7 days

Compare 0/4

Clear Compare now Compare