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 - 9mm in length](/Produktbilder/normal/57641_1/ASToptics-T2-extension-tube-9mm-in-length.jpg)
ASToptics
T2 extension tube - 9mm in length
$ 27.90
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
$ 27.90
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
$ 33.90
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
$ 27.90
ready for shipping in 24
h
![ASToptics T2 extension tube - 4mm long](/Produktbilder/normal/57864_1/ASToptics-T2-extension-tube-4mm-long.jpg)
ASToptics
T2 extension tube - 4mm long
$ 22.90
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
$ 27.90
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
$ 22.90
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
$ 27.90
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
$ 33.90
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
$ 38.90
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)
$ 11.90
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 1-2
weeks
![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 24
h
![ZWO Camera ASI 071 MC Pro Color](/Produktbilder/normal/56556_1/ZWO-Camera-ASI-071-MC-Pro-Color.jpg)
ZWO
Camera ASI 071 MC Pro Color
RRP:
$ 2,330.00
Our price:
$ 2,013.00
ready for shipping in 24
h
![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 )
$ 37.90
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
$ 82.00
ready for shipping in 24
h
![ZWO Camera ASI 462 MM Mono](/Produktbilder/normal/77435_1/ZWO-Camera-ASI-462-MM-Mono.jpg)
ZWO
Camera ASI 462 MM Mono
RRP:
$ 429.00
Our price:
$ 371.00
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
$ 77.00
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
$ 19.90
ready for shipping in 24
h
![Explore Scientific Camera Deep Sky Astro 26MP](/Produktbilder/normal/78209_1/Explore-Scientific-Camera-Deep-Sky-Astro-26MP.jpg)
Explore Scientific
Camera Deep Sky Astro 26MP
$ 1,780.00
ready for shipping in 1-2
weeks
![Starlight Xpress Camera Trius PRO-825 Mono, Combi Set](/Produktbilder/normal/44333_1/Starlight-Xpress-Camera-Trius-PRO-825-Mono-Combi-Set.jpg)
Starlight Xpress
Camera Trius PRO-825 Mono, Combi Set
RRP:
$ 2,660.00
Our price:
$ 2,450.00
ready for shipping in 1-2
weeks
![TS Optics Camera adaptor T2/Sony Alpha & Minolta](/Produktbilder/normal/76374_1/TS-Optics-Camera-adaptor-T2-Sony-Alpha-Minolta.jpg)
TS Optics
Camera adaptor T2/Sony Alpha & Minolta
$ 41.90
ready for shipping in 3-7
days
![Omegon T-thread Extension and 2'' nosepiece 21mm](/img5b29d2a57/products/product_placeholder_300x300.png)
Omegon
T-thread Extension and 2'' nosepiece 21mm
$ 19.90
ready for shipping in 24
h
![Starlight Xpress Camera Trius PRO-694C Color](/Produktbilder/normal/33555_1/Starlight-Xpress-Camera-Trius-PRO-694C-Color.jpg)
Starlight Xpress
Camera Trius PRO-694C Color
$ 3,080.00
ready for shipping in 24
h
![TS Optics Extension tube T2 10mm](/Produktbilder/normal/43675_1/TS-Optics-Extension-tube-T2-10mm.jpg)
TS Optics
Extension tube T2 10mm
$ 20.90
ready for shipping in 24
h
![Starlight Xpress Camera Trius PRO-674 Mono](/Produktbilder/normal/33552_1/Starlight-Xpress-Camera-Trius-PRO-674-Mono.jpg)
Starlight Xpress
Camera Trius PRO-674 Mono
$ 2,460.00
ready for shipping in 1-2
weeks
![Starlight Xpress Camera Trius PRO-674C Color](/Produktbilder/normal/33552_1/Starlight-Xpress-Camera-Trius-PRO-674C-Color.jpg)
Starlight Xpress
Camera Trius PRO-674C Color
$ 2,460.00
ready for shipping in 1-2
weeks
![Starlight Xpress Camera Trius PRO-825 Mono](/Produktbilder/normal/48686_1/Starlight-Xpress-Camera-Trius-PRO-825-Mono.jpg)
Starlight Xpress
Camera Trius PRO-825 Mono
$ 1,820.00
ready for shipping in 24
h
![Starlight Xpress Camera Trius PRO-825C Color](/Produktbilder/normal/48686_1/Starlight-Xpress-Camera-Trius-PRO-825C-Color.jpg)
Starlight Xpress
Camera Trius PRO-825C Color
$ 1,820.00
ready for shipping in 1-2
weeks
![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
$ 20.90
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
$ 20.90
ready for shipping in 24
h