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
Adapter T-Adaptors M54(m)/T2(m)
$ 24.90
ZWO
T2 / C mount adapter
$ 29.90
Baader
T2/1.25" ultrashort adapter
$ 37.90
Baader
Adapter Eyepiece clamp ClickLock 1 ¼"/T-2i
$ 102.00
ZWO
Adapter M54 to M48
$ 20.90
ASToptics
1.25" eyepiece to 0.965 focuser adapter
$ 40.90
Starlight Instruments
Takahashi FS128 tube adapter ring
RRP:
$ 660.00
Our price:
$ 489.00
ZWO
Adapter M54 Adaptors for Filter Drawer
$ 40.90
TS Optics
Adapter Adaptor for 1,25" eyepieces to 24,5mm / 0.965" focuser
$ 37.90
TS Optics
Adapter 48mm to M54 Adaptors
$ 11.90
TS Optics
Adapter Adaptors M48/M54
$ 53.00
TS Optics
Adapter M35/T2
$ 58.00
Baader
Adapter 2" M42 (T2) ClickLock clamp
$ 117.00
Baader
Adapter M68/S52 Adaptors for Wide-T-Rings
$ 54.00
TS Optics
Adapter Adaptors T2/M48
$ 30.90
Geoptik
Adapter 50.8mm/M58 Adaptors
$ 34.90
Baader
Adapter 2"/S52 extension tube
$ 47.90
TS Optics
T2 to M48 adapter
$ 26.90
William Optics
Adapter SCT connection for WO Diagonals
$ 69.00
Baader
Adapter 2" S52 ClickLock clamp
$ 96.00
Starlight Instruments
"Takahashi TOA 150" 3.5" tube adapter ring
RRP:
$ 730.00
Our price:
$ 540.00
Starlight Instruments
3.0" tube adapter - specifically designed to fit our FTF3035B to your Takahashi FS102 or TSA102 telescope
RRP:
$ 670.00
Our price:
$ 498.00
Starlight Instruments
3.0" - 115-1.25mm female thread adapter, 2.586" L (fits William Optics FLT 110 telescopes)
RRP:
$ 670.00
Our price:
$ 498.00
Baader
Adapter Hyperion quilt-achieve M62 on M72
$ 29.90
Baader
Adapter Hyperion quilt-achieve M72 on M82
$ 29.90
Geoptik
Maksutov / SC Adapter
$ 40.90
TS Optics
T2/SC adapter
$ 25.90
TS Optics
Adapter Adaptors 2"/SC
$ 34.90
Baader
Adapter 1.25" / T2 eyepiece clamp
$ 26.90
Baader
Adapter Hyperion quilt-achieve M62 on M77
$ 29.90
Starlight Instruments
Adapter 95mm x 1mm thread, standard
RRP:
$ 443.00
Our price:
$ 326.00
TS Optics
M28i to T2i adapter
$ 27.90
TeleVue
SCT Adapter long
$ 116.00
Starlight Instruments
3.0" - 83.0mm male thread tube adapter (fits Meade 14)
RRP:
$ 670.00
Our price:
$ 450.00
Starlight Instruments
3.0" - 3.29x16tpi female thread tube adapter, 2.335" L (fits Celestron C11 and C14 telescopes)
RRP:
$ 670.00
Our price:
$ 450.00
