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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.

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ZWO Camera ASI 2600 MC Pro Color
ZWO
Camera ASI 2600 MC Pro Color
RRP:  $ 2,900.00
Our price:
$ 2,687.00
ready for shipping in 24 h
ZWO Camera ASI 2600 MM Pro Mono
ZWO
Camera ASI 2600 MM Pro Mono
RRP:  $ 3,740.00
Our price:
$ 3,457.00
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Omegon Camera adaptor T2-Ring compatible with Canon EOS
Omegon
Camera adaptor T2-Ring compatible with Canon EOS
( 4 / 5 )
$ 19.90
ready for shipping in 24 h
Omegon 40mm T2i/T2a T2 extension ring
Omegon
40mm T2i/T2a T2 extension ring
$ 24.90
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Omegon 7.5 mm T2i/T2a T2 extension ring
Omegon
7.5 mm T2i/T2a T2 extension ring
$ 19.90
ready for shipping in 24 h
Omegon Extension tube Extender 30 mm T- thread
Omegon
Extension tube Extender 30 mm T- thread
$ 29.90
ready for shipping in 24 h
Omegon 15mm T2i/T2a T2 extension ring
Omegon
15mm T2i/T2a T2 extension ring
$ 24.90
ready for shipping in 24 h
ASToptics T2 extension tube - 30mm
ASToptics
T2 extension tube - 30mm
$ 20.90
ready for shipping in 24 h
ZWO Camera ASI 174 MM Mono
ZWO
Camera ASI 174 MM Mono
RRP:  $ 850.00
Our price:
$ 779.00
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Omegon T-thread Extension and 2'' nosepiece 21mm
Omegon
T-thread Extension and 2'' nosepiece 21mm
$ 19.90
ready for shipping in 24 h
Omegon Camera adaptor T2-Ring für Nikon
Omegon
Camera adaptor T2-Ring für Nikon
$ 19.90
ready for shipping in 24 h
ASToptics Extension tube T2 Fine tuning Kit - 0.5mm; 0.8mm; 1mm
ASToptics
Extension tube T2 Fine tuning Kit - 0.5mm; 0.8mm; 1mm
$ 25.90
ready for shipping in 24 h
ASToptics T2 extension tube - 7mm long
ASToptics
T2 extension tube - 7mm long
$ 25.90
ready for shipping in 24 h
ASToptics T2 extension tube - 6mm long
ASToptics
T2 extension tube - 6mm long
$ 25.90
ready for shipping in 24 h
Omegon Extension tube Extender 7 mm T-thread
Omegon
Extension tube Extender 7 mm T-thread
$ 29.90
ready for shipping in 24 h
ASToptics T2 extension tube - 9mm in length
ASToptics
T2 extension tube - 9mm in length
$ 25.90
ready for shipping in 24 h
ASToptics T2 extension tube - 4mm long
ASToptics
T2 extension tube - 4mm long
$ 20.90
ready for shipping in 24 h
Omegon Adapter Visual T male to 1.25” female with set screw
Omegon
Adapter Visual T male to 1.25” female with set screw
$ 34.90
ready for shipping in 24 h
ASToptics T2 Extension tube - 5mm long
ASToptics
T2 Extension tube - 5mm long
$ 20.90
ready for shipping in 24 h
Omegon Extension tube Extender 17 mm T-thread
Omegon
Extension tube Extender 17 mm T-thread
$ 29.90
ready for shipping in 24 h
Starlight Xpress Camera Trius PRO-825 Mono
Starlight Xpress
Camera Trius PRO-825 Mono
$ 1,700.00
ready for shipping in 24 h
ASToptics Extension tube T2 fine tuning ring - 1mm (aluminium)
ASToptics
Extension tube T2 fine tuning ring - 1mm (aluminium)
$ 10.90
ready for shipping in 24 h
TS Optics T2 extension tube, 5mm optical path
TS Optics
T2 extension tube, 5mm optical path
$ 19.90
ready for shipping in 24 h
TS Optics T2 extension ring, optical path 3mm
TS Optics
T2 extension ring, optical path 3mm
$ 19.90
ready for shipping in 24 h
Baader Extension tube Fine Tuning Ring Set T2 0.3 / 0.5 / 1mm
Baader
Extension tube Fine Tuning Ring Set T2 0.3 / 0.5 / 1mm
$ 18.90
ready for shipping in 24 h
Baader Extension tube VariLock 46 lockable T-2 29-46mm extender, with lock spanner
Baader
Extension tube VariLock 46 lockable T-2 29-46mm extender, with lock spanner
$ 76.00
ready for shipping in 24 h
Baader Extension tube Fine Tuning Ring Set T2
Baader
Extension tube Fine Tuning Ring Set T2
$ 14.90
ready for shipping in 24 h
ASToptics Extension tube T2 fine-tuning ring - 0.5mm (aluminium)
ASToptics
Extension tube T2 fine-tuning ring - 0.5mm (aluminium)
$ 8.90
ready for shipping in 24 h
ASToptics T2 extension tube - 12mm long
ASToptics
T2 extension tube - 12mm long
$ 20.90
ready for shipping in 24 h
ASToptics T2 extension tube - 8mm long
ASToptics
T2 extension tube - 8mm long
$ 25.90
ready for shipping in 24 h
ASToptics T2 extension tube - 15mm long
ASToptics
T2 extension tube - 15mm long
$ 20.90
ready for shipping in 24 h
TS Optics Extension tube T2 10mm
TS Optics
Extension tube T2 10mm
$ 19.90
ready for shipping in 24 h
Starlight Xpress Camera Trius PRO-694C Color
Starlight Xpress
Camera Trius PRO-694C Color
$ 2,880.00
ready for shipping in 24 h
Omegon Adaptors 1.25'', 30mm extension tube
Omegon
Adaptors 1.25'', 30mm extension tube
$ 24.90
ready for shipping in 24 h
ASToptics T-Thread extension kit / 7mm
ASToptics
T-Thread extension kit / 7mm
$ 52.00
ready for shipping in 24 h
Omegon adapter ring M48-T2 0mm
Omegon
adapter ring M48-T2 0mm
$ 17.90
ready for shipping in 3-5 weeks