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 ''
$ 29.90
Omegon
T2 to 1.25'' adapter
$ 29.90
ASToptics
M54 (Female) to M48 (Male) adapter
$ 34.90
Omegon
2'' Twist-lock adapter
$ 99.00
Artesky
Adapter Twist Lock 2" (Skywatcher Newton)
$ 116.00
Omegon
Adapter T-Adaptors M54(m)/T2(m)
$ 24.90
PegasusAstro
Adapter M54 Male - M54 Male
$ 34.90
Omegon
2'' to 1.25" reducer adapter
$ 39.90
Baader
ClickLock 2" to 1.25" reducer adapter
$ 97.00
ZWO
T2 / C mount adapter
$ 29.90
Omegon
Adapter 2'' T2 Adaptors with 1.25'' Reducer
RRP:
$ 64.80
Our price:
$ 49.90
ASToptics
M42 (FEMALE) TO M42 (FEMALE) adapter, 10MM
$ 29.90
Baader
Adapter 2" M54 ClickLock clamp
$ 103.00
ASToptics
T2 ADAPTER FOR TELEVUE POWERMATE 2.5X/5X
$ 59.00
ASToptics
M48(M) to 1.25" filter(F) adapter
$ 17.90
TS Optics
Adapter for the attachment of 2'' at T2
$ 40.90
Omegon
adapter ring M48-T2 0mm
$ 17.90
Baader
Adapter Focusing T-2 eyepiece clamp 1 1/4 "
$ 54.00
Baader
T2/1.25" ultrashort adapter
$ 37.90
Baader
Adapter Eyepiece clamp ClickLock 1 ¼"/T-2i
$ 102.00
Celestron
Adapter SCT Visual Back 1,25"
$ 40.90
ZWO
Adapter M54 to M48
$ 20.90
ASToptics
Easy-Grip Twist-Lock Adapter (2" to 1.25")
$ 81.00
ASToptics
Easy-Grip Twist-Lock adapter (M42 to 1.25")
$ 81.00
ASToptics
M42 MALE TO 1.25"/ T2 ADAPTER
$ 69.00
ASToptics
72mm to M48 adapter, 2"
$ 17.90
PegasusAstro
Adapter M54 Male - M48 Male
$ 46.90
PegasusAstro
Adapter M54 Male - M48 Female
$ 46.90
ASToptics
M56x0.75 (F) to M48x0.75 (M) adapter
$ 34.90
PrimaLuceLab
Adapter M81/M72 ESATTO 3" / ARCO 3"
$ 102.00
Omegon
Adapter Visual T male to 1.25” female with set screw
$ 34.90
ASToptics
1.25" eyepiece to 0.965 focuser adapter
$ 40.90
Pierro Astro
Adapter from big SC-thread (3.3") to standard SC-thread (2")
$ 69.00
ASToptics
M56(M) to M48(F) adapter
$ 34.90
