A T2 thread, also written T-2, has a diameter of 42mm and a thread pitch of 0.75mm. It is also sometimes written as M42x0.75.
The low pitch distinguishes it from other M42 threads.
![ASToptics T2 extension tube - 4mm long](/Produktbilder/normal/57864_1/ASToptics-T2-extension-tube-4mm-long.jpg)
ASToptics
T2 extension tube - 4mm long
$ 21.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 6mm long](/Produktbilder/normal/57865_1/ASToptics-T2-extension-tube-6mm-long.jpg)
ASToptics
T2 extension tube - 6mm long
$ 26.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 9mm in length](/Produktbilder/normal/57641_1/ASToptics-T2-extension-tube-9mm-in-length.jpg)
ASToptics
T2 extension tube - 9mm in length
$ 26.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 7mm long](/Produktbilder/normal/57672_1/ASToptics-T2-extension-tube-7mm-long.jpg)
ASToptics
T2 extension tube - 7mm long
$ 26.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 30mm](/Produktbilder/normal/57673_1/ASToptics-T2-extension-tube-30mm.jpg)
ASToptics
T2 extension tube - 30mm
$ 32.90
ready for shipping in 24
h
![ASToptics Extension tube T2 Fine tuning Kit - 0.5mm; 0.8mm; 1mm](/Produktbilder/normal/57846_1/ASToptics-Extension-tube-T2-Fine-tuning-Kit-0-5mm-0-8mm-1mm.jpg)
ASToptics
Extension tube T2 Fine tuning Kit - 0.5mm; 0.8mm; 1mm
$ 26.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 12mm long](/Produktbilder/normal/57911_1/ASToptics-T2-extension-tube-12mm-long.jpg)
ASToptics
T2 extension tube - 12mm long
$ 32.90
ready for shipping in 24
h
![ASToptics T2 Extension tube - 5mm long](/Produktbilder/normal/57643_1/ASToptics-T2-Extension-tube-5mm-long.jpg)
ASToptics
T2 Extension tube - 5mm long
$ 21.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 8mm long](/Produktbilder/normal/57872_1/ASToptics-T2-extension-tube-8mm-long.jpg)
ASToptics
T2 extension tube - 8mm long
$ 26.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 15mm long](/Produktbilder/normal/57639_1/ASToptics-T2-extension-tube-15mm-long.jpg)
ASToptics
T2 extension tube - 15mm long
$ 37.90
ready for shipping in 24
h
![ASToptics Extension tube T2 fine-tuning ring - 0.5mm (aluminium)](/Produktbilder/normal/57655_1/ASToptics-Extension-tube-T2-fine-tuning-ring-0-5mm-aluminium-.jpg)
ASToptics
Extension tube T2 fine-tuning ring - 0.5mm (aluminium)
$ 8.90
ready for shipping in 24
h
![ASToptics Extension tube T2 fine tuning ring - 1mm (aluminium)](/Produktbilder/normal/57657_1/ASToptics-Extension-tube-T2-fine-tuning-ring-1mm-aluminium-.jpg)
ASToptics
Extension tube T2 fine tuning ring - 1mm (aluminium)
$ 10.90
ready for shipping in 24
h
![ASToptics Extension tube T2 fine tuning ring - 2mm (aluminium)](/Produktbilder/normal/57662_1/ASToptics-Extension-tube-T2-fine-tuning-ring-2mm-aluminium-.jpg)
ASToptics
Extension tube T2 fine tuning ring - 2mm (aluminium)
$ 6.90
ready for shipping in 24
h
![ASToptics Extension tube T2 fine tuning ring - 0.3mm (aluminium)](/Produktbilder/normal/57850_1/ASToptics-Extension-tube-T2-fine-tuning-ring-0-3mm-aluminium-.jpg)
ASToptics
Extension tube T2 fine tuning ring - 0.3mm (aluminium)
$ 6.90
ready for shipping in 1-2
weeks
![TS Optics T2 extension ring, optical path 20mm](/Produktbilder/normal/43676_1/TS-Optics-T2-extension-ring-optical-path-20mm.jpg)
TS Optics
T2 extension ring, optical path 20mm
$ 21.90
ready for shipping in 24
h
![TS Optics T2 spacer and extension tube, optical path 20.5 mm to 30mm](/Produktbilder/normal/43679_1/TS-Optics-T2-spacer-and-extension-tube-optical-path-20-5-mm-to-30mm.jpg)
TS Optics
T2 spacer and extension tube, optical path 20.5 mm to 30mm
( 1 / 5 )
$ 36.90
ready for shipping in 3-7
days
![TS Optics Extension tube T2 26mm extender](/Produktbilder/normal/49096_1/TS-Optics-Extension-tube-T2-26mm-extender.jpg)
TS Optics
Extension tube T2 26mm extender
$ 21.90
ready for shipping in 3-7
days
![Artesky Extension tube T2 40mm](/Produktbilder/normal/68377_1/Artesky-Extension-tube-T2-40mm.jpg)
Artesky
Extension tube T2 40mm
$ 17.90
ready for shipping in 3-5
weeks
![Artesky Extension tube T2 15mm](/Produktbilder/normal/68376_1/Artesky-Extension-tube-T2-15mm.jpg)
Artesky
Extension tube T2 15mm
$ 16.90
ready for shipping in 3-5
weeks
![Baader Extension tube VariLock 46 lockable T-2 29-46mm extender, with lock spanner](/Produktbilder/normal/17170_1/Baader-Extension-tube-VariLock-46-lockable-T-2-29-46mm-extender-with-lock-spanner.jpg)
Baader
Extension tube VariLock 46 lockable T-2 29-46mm extender, with lock spanner
$ 79.00
ready for shipping in 24
h
![Baader Extension tube VariLock 29 lockable T-2 20-29mm extender, with lock spanner](/Produktbilder/normal/17169_1/Baader-Extension-tube-VariLock-29-lockable-T-2-20-29mm-extender-with-lock-spanner.jpg)
Baader
Extension tube VariLock 29 lockable T-2 20-29mm extender, with lock spanner
$ 75.00
ready for shipping in 1-2
weeks
![Baader Extension tube Fine Tuning Ring Set T2 0.3 / 0.5 / 1mm](/Produktbilder/normal/77487_1/Baader-Extension-tube-Fine-Tuning-Ring-Set-T2-0-3-0-5-1mm.jpg)
Baader
Extension tube Fine Tuning Ring Set T2 0.3 / 0.5 / 1mm
$ 18.90
ready for shipping in 1-2
weeks
![TS Optics Extension tube T2 10mm](/Produktbilder/normal/43675_1/TS-Optics-Extension-tube-T2-10mm.jpg)
TS Optics
Extension tube T2 10mm
$ 19.90
ready for shipping in 24
h
![TS Optics T2 extension tube, 5mm optical path](/Produktbilder/normal/32995_1/TS-Optics-T2-extension-tube-5mm-optical-path.jpg)
TS Optics
T2 extension tube, 5mm optical path
$ 19.90
ready for shipping in 24
h
![TS Optics T2 extension ring, optical path 3mm](/Produktbilder/normal/43677_1/TS-Optics-T2-extension-ring-optical-path-3mm.jpg)
TS Optics
T2 extension ring, optical path 3mm
$ 19.90
ready for shipping in 24
h
![TS Optics Extension tube Fine Tuning Ring for T2-thread - thickness 0.5 mm](/Produktbilder/normal/48168_1/TS-Optics-Extension-tube-Fine-Tuning-Ring-for-T2-thread-thickness-0-5-mm.jpg)
TS Optics
Extension tube Fine Tuning Ring for T2-thread - thickness 0.5 mm
$ 10.90
ready for shipping in 3-7
days
![TS Optics T2 extension tube, 8mm optical path](/Produktbilder/normal/43678_1/TS-Optics-T2-extension-tube-8mm-optical-path.jpg)
TS Optics
T2 extension tube, 8mm optical path
$ 19.90
ready for shipping in 3-7
days
![Baader Extension tube Fine Tuning Ring Set T2](/Produktbilder/normal/10615_1/Baader-Extension-tube-Fine-Tuning-Ring-Set-T2.jpg)
Baader
Extension tube Fine Tuning Ring Set T2
$ 15.90
ready for shipping in 1-2
weeks
![ASToptics T-Thread extension kit / 7mm](/Produktbilder/normal/57840_1/ASToptics-T-Thread-extension-kit-7mm.jpg)
ASToptics
T-Thread extension kit / 7mm
$ 54.00
ready for shipping in 24
h
![Baader Extension tube T-2 intermediate ring 7.5 mm T-2i/T-2a](/Produktbilder/normal/10605_1/Baader-Extension-tube-T-2-intermediate-ring-7-5-mm-T-2i-T-2a.jpg)
Baader
Extension tube T-2 intermediate ring 7.5 mm T-2i/T-2a
$ 23.90
ready for shipping in 1-2
weeks
![Celestron Extension tube T2 Set](/Produktbilder/normal/69657_1/Celestron-Extension-tube-T2-Set.jpg)
Celestron
Extension tube T2 Set
$ 75.00
ready for shipping in 1-2
weeks
![Omegon 7.5 mm T2i/T2a T2 extension ring](/Produktbilder/normal/33226_1/Omegon-7-5-mm-T2i-T2a-T2-extension-ring.jpg)
Omegon
7.5 mm T2i/T2a T2 extension ring
$ 19.90
ready for shipping in 24
h
![Omegon 15mm T2i/T2a T2 extension ring](/Produktbilder/normal/33224_1/Omegon-15mm-T2i-T2a-T2-extension-ring.jpg)
Omegon
15mm T2i/T2a T2 extension ring
$ 24.90
ready for shipping in 24
h
![Omegon Extension tube Extender 30 mm T- thread](/Produktbilder/normal/21991_1/Omegon-Extension-tube-Extender-30-mm-T-thread.jpg)
Omegon
Extension tube Extender 30 mm T- thread
$ 29.90
ready for shipping in 24
h
![Omegon Visual T male to 1.25” female with set screw](/Produktbilder/normal/21992_1/Omegon-Visual-T-male-to-1-25r-female-with-set-screw.jpg)
Omegon
Visual T male to 1.25” female with set screw
$ 34.90
ready for shipping in 24
h
![Omegon Extension tube Extender 7 mm T-thread](/Produktbilder/normal/21989_1/Omegon-Extension-tube-Extender-7-mm-T-thread.jpg)
Omegon
Extension tube Extender 7 mm T-thread
$ 29.90
ready for shipping in 24
h