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'' - 1.25'' Twist-lock adapter
$ 79.00
Omegon
2'' adapters with reducer 1.25 ''
$ 24.90
Omegon
2'' Twist-lock adapter
$ 99.00
Artesky
Adapter Twist Lock 2" (Skywatcher Newton)
$ 117.00
Omegon
2'' to 1.25" reducer adapter
$ 34.90
Baader
Adapter 2" M54 ClickLock clamp
$ 104.00
Omegon
Adapter 2'' T2 Adaptors with 1.25'' Reducer
RRP:
$ 59.00
Our price:
$ 49.00
ASToptics
72mm to M48 adapter, 2"
$ 26.90
Celestron
Adapter SCT Visual Back 1,25"
$ 41.90
ASToptics
Easy-Grip Twist-Lock adapter (M42 to 1.25")
$ 82.00
TS Optics
Adapter for the attachment of 2'' at T2
$ 41.90
PrimaLuceLab
Adapter M81/M72 ESATTO 3" / ARCO 3"
$ 103.00
Pierro Astro
Adapter from big SC-thread (3.3") to standard SC-thread (2")
$ 70.00
TS Optics
Adapter Adaptors M68/M48
$ 53.00
APM
Adapter FastLock M48/2"
$ 70.00
Baader
Adapter M48 adaptor for Diamond Steeltrack BDS
$ 34.90
Skywatcher
Adapter Twist Lock 2"/1,25"
$ 36.90
PegasusAstro
Adapter M68 Male to M65 Male (for Skywatcher Esprit 100)
$ 51.00
ASToptics
2" adapter for 55mm to M48
$ 25.90
APM
2”/1.25” adapter
$ 46.90
Baader
Adapter 2" ClickLock M72 clamp for all large Takahashi refractors
$ 135.00
Baader
Adapter M48 / T2
$ 35.90
Baader
Adapter 2" ClickLock SCL clamp (C11-C14) for large SC telescopes
$ 119.00
TS Optics
Adapter M86 / M68
$ 117.00
PegasusAstro
Adapter M68 / M63
$ 32.90
Baader
Adapter ClickLock M54/2"
$ 113.00
TS Optics
Adapter Adaptors M82 / M68
$ 83.00
Baader
Adapter ClickLock Clamp M68x0.75 (Hexafoc) / 2"
$ 117.00
ASToptics
Easy-Grip Twist-Lock Adapter (2" to 1.25")
$ 82.00
Baader
Adapter 2" ClickLock clamp M48
$ 111.00
TS Optics
Adapter M68/M54
$ 71.00
Baader
Adapter ClickLock Clamp 2" M54i x 0.75
$ 98.00
ASToptics
Easy Grip Twist-Lock adapter (M48 to 1.25")
$ 82.00
Explore Scientific
Adapter 3" Flattener/Reducer to M48x0.75
$ 42.90
Baader
Adapter 2" M56 ClickLock clamp
$ 102.00
