The world of adapters is diverse and not easy to understand. This is due to the wide variety of thread and plug sizes that optics and accessories may have.
In astronomy, two plug sizes have become established, which are often indicated in the old unit inches ("):
- 1.25" corresponds to 31.8 millimetre
- 2" corresponds to 50.8 millimetres
Many eyepieces, but also cameras, have connectors in one of these two sizes, which can be inserted into the telescope’s focuser.
If a 1.25" connector is to be inserted in a focuser with a 2" connector, a 1.25"/2" adapter is required. This is an example of a reducer adapter: where a connection is reduced from a larger size to a smaller one. The reverse is called an extension adapter.
Another very important category of adapters is camera adapters. These are used to connect cameras to optics or to accessories. The T2 thread (M42x0.75), which enables a screw connection, is very well established for this purpose. Lighter cameras without many accessories can also be easily connected to the telescope via a socket.
For astrophotography it is important that the aperture is large enough to illuminate the sensor (no vignetting) and the optical length matches the focal point.
![Omegon 2'' adapters with reducer 1.25 ''](/Produktbilder/normal/1044_1/Omegon-2-adapters-with-reducer-1-25-.jpg)
Omegon
2'' adapters with reducer 1.25 ''
$ 29.90
![ASToptics 2" adapter for 55mm to M48](/Produktbilder/normal/57818_1/ASToptics-2-adapter-for-55mm-to-M48.jpg)
ASToptics
2" adapter for 55mm to M48
$ 16.90
![ASToptics Easy-Grip Twist-Lock Adapter (2" to 1.25")](/Produktbilder/normal/57894_1/ASToptics-Easy-Grip-Twist-Lock-Adapter-2-to-1-25-.jpg)
ASToptics
Easy-Grip Twist-Lock Adapter (2" to 1.25")
$ 77.00
![Omegon 2'' to 1.25" reducer adapter](/Produktbilder/normal/33229_1/Omegon-2-to-1-25-reducer-adapter.jpg)
Omegon
2'' to 1.25" reducer adapter
$ 39.90
![Explore Scientific M48/T2 adapter](/Produktbilder/normal/68621_1/Explore-Scientific-M48-T2-adapter.jpg)
Explore Scientific
M48/T2 adapter
$ 27.90
![Omegon 2'' - 1.25'' Twist-lock adapter](/Produktbilder/normal/45633_1/Omegon-2-1-25-Twist-lock-adapter.jpg)
Omegon
2'' - 1.25'' Twist-lock adapter
$ 79.00
![ASToptics 72mm to M48 adapter, 2"](/Produktbilder/normal/57823_1/ASToptics-72mm-to-M48-adapter-2-.jpg)
ASToptics
72mm to M48 adapter, 2"
$ 16.90
![Omegon 2'' Twist-lock adapter](/Produktbilder/normal/45635_1/Omegon-2-Twist-lock-adapter.jpg)
Omegon
2'' Twist-lock adapter
$ 99.00
![ASToptics Easy Grip Twist-Lock adapter (M48 to 1.25")](/Produktbilder/normal/57896_1/ASToptics-Easy-Grip-Twist-Lock-adapter-M48-to-1-25-.jpg)
ASToptics
Easy Grip Twist-Lock adapter (M48 to 1.25")
$ 77.00
![ASToptics Easy-Grip Twist-Lock adapter (M42 to 1.25")](/Produktbilder/normal/57895_1/ASToptics-Easy-Grip-Twist-Lock-adapter-M42-to-1-25-.jpg)
ASToptics
Easy-Grip Twist-Lock adapter (M42 to 1.25")
$ 77.00
![Lumicon 1.25" Male - 0.965" Female Reducer](/Produktbilder/normal/6844_1/Lumicon-1-25-Male-0-965-Female-Reducer.jpg)
Lumicon
1.25" Male - 0.965" Female Reducer
$ 49.90
![Optec Adapter T2/ & Lepus 2"](/Produktbilder/normal/49433_1/Optec-Adapter-T2-Lepus-2-.jpg)
Optec
Adapter T2/ & Lepus 2"
$ 166.00
![Howie Glatter Parallizer 2" to 1.25" reducer adapter](/Produktbilder/normal/23927_2/Howie-Glatter-Parallizer-2-to-1-25-reducer-adapter.jpg)
Howie Glatter
Parallizer 2" to 1.25" reducer adapter
$ 222.00
![Starlight Xpress M54 adapter (male) for SX USB filter wheel](/Produktbilder/normal/16794_3/Starlight-Xpress-M54-adapter-male-for-SX-USB-filter-wheel.jpg)
Starlight Xpress
M54 adapter (male) for SX USB filter wheel
$ 56.00
![Starlight Xpress M54 adapter (female) for SX USB filter wheel](/Produktbilder/normal/16794_3/Starlight-Xpress-M54-adapter-female-for-SX-USB-filter-wheel.jpg)
Starlight Xpress
M54 adapter (female) for SX USB filter wheel
$ 56.00
![Starlight Xpress M52 adapter (female) for SX USB filter wheel](/Produktbilder/normal/16794_3/Starlight-Xpress-M52-adapter-female-for-SX-USB-filter-wheel.jpg)
Starlight Xpress
M52 adapter (female) for SX USB filter wheel
$ 56.00
![Starlight Xpress M52 adapter (male) for SX USB filter wheel](/Produktbilder/normal/16794_3/Starlight-Xpress-M52-adapter-male-for-SX-USB-filter-wheel.jpg)
Starlight Xpress
M52 adapter (male) for SX USB filter wheel
$ 56.00
![APM FastLock M68/2"](/Produktbilder/normal/70035_1/APM-FastLock-M68-2-.jpg)
APM
FastLock M68/2"
$ 66.00
![APM FastLock M48/2"](/Produktbilder/normal/70034_1/APM-FastLock-M48-2-.jpg)
APM
FastLock M48/2"
$ 66.00
![TS Optics Adapter M82/M68](/Produktbilder/normal/71187_1/TS-Optics-Adapter-M82-M68.jpg)
TS Optics
Adapter M82/M68
$ 82.00
![TS Optics SP52/T2](/Produktbilder/normal/84190_1/TS-Optics-SP52-T2.jpg)
TS Optics
SP52/T2
$ 56.00
![Lunt Solar Systems Lunt T2 to 2" blocking filter adapter](/Produktbilder/normal/33270_1/Lunt-Solar-Systems-Lunt-T2-to-2-blocking-filter-adapter.jpg)
Lunt Solar Systems
Lunt T2 to 2" blocking filter adapter
$ 32.90
![TS Optics Adapter from M63x1 male to M48x0.75 male](/Produktbilder/normal/74334_1/TS-Optics-Adapter-from-M63x1-male-to-M48x0-75-male.jpg)
TS Optics
Adapter from M63x1 male to M48x0.75 male
RRP:
$ 66.00
Our price:
$ 49.90
![TS Optics SC/T2 adapter](/Produktbilder/normal/71190_1/TS-Optics-SC-T2-adapter.jpg)
TS Optics
SC/T2 adapter
$ 54.00
![APM Adapter from M63x1 male to M48x0.75 male](/Produktbilder/normal/73729_1/APM-Adapter-from-M63x1-male-to-M48x0-75-male.jpg)
APM
Adapter from M63x1 male to M48x0.75 male
$ 48.90
![Skywatcher Twist Lock 2"/1,25"](/Produktbilder/normal/33418_1/Skywatcher-Twist-Lock-2-1-25-.jpg)
Skywatcher
Twist Lock 2"/1,25"
$ 34.90
![Artesky Twist Lock 2" (Skywatcher Newton)](/Produktbilder/normal/76402_1/Artesky-Twist-Lock-2-Skywatcher-Newton-.jpg)
Artesky
Twist Lock 2" (Skywatcher Newton)
$ 112.00
![TS Optics Adapter M68/M63](/Produktbilder/normal/70847_1/TS-Optics-Adapter-M68-M63.jpg)
TS Optics
Adapter M68/M63
$ 56.00
![TS Optics Adapter for the attachment of 2'' at T2](/Produktbilder/normal/4982_1/TS-Optics-Adapter-for-the-attachment-of-2-at-T2.jpg)
TS Optics
Adapter for the attachment of 2'' at T2
$ 38.90
![Artesky Adapter Twist Lock SC / 2"](/Produktbilder/normal/63352_1/Artesky-Adapter-Twist-Lock-SC-2-.jpg)
Artesky
Adapter Twist Lock SC / 2"
$ 67.00
![TS Optics Adapter SC female thread to M48 male thread](/Produktbilder/normal/56580_1/TS-Optics-Adapter-SC-female-thread-to-M48-male-thread.jpg)
TS Optics
Adapter SC female thread to M48 male thread
$ 44.90
![TS Optics M68/M48](/Produktbilder/normal/84744_1/TS-Optics-M68-M48.jpg)
TS Optics
M68/M48
$ 58.00
![TS Optics M68/M54](/Produktbilder/normal/84598_1/TS-Optics-M68-M54.jpg)
TS Optics
M68/M54
$ 67.00
![TS Optics Adapter M74 / M68](/Produktbilder/normal/61974_1/TS-Optics-Adapter-M74-M68.jpg)
TS Optics
Adapter M74 / M68
$ 83.00
![TS Optics 1.25" to 24.5mm adapter (ZEISS eyepieces)](/Produktbilder/normal/48762_1/TS-Optics-1-25-to-24-5mm-adapter-ZEISS-eyepieces-.jpg)
TS Optics
1.25" to 24.5mm adapter (ZEISS eyepieces)
$ 27.90
![TS Optics Riccardi connection adapter for M68 and M63 to M48](/Produktbilder/normal/56019_1/TS-Optics-Riccardi-connection-adapter-for-M68-and-M63-to-M48.jpg)