Astronomy Type Adaptors

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.

More information on the topic "Type" in our glossary...

Astronomy

Type: Adaptors

Omegon

2“ Extension tube, 35mm optical path

$ 29.90

Omegon

1.25'', 30mm extension tube

$ 19.90

Omegon

2'' extension tube with 50mm optical path

$ 39.90

Omegon

2'' - 1.25'' Twist-lock adapter

$ 79.00

Omegon

T2 to 1.25'' adapter

$ 29.90

Omegon

2'' extension tube, 80mm optical path

$ 49.90

Omegon

2'' Twist-lock adapter

$ 99.00

Explore Scientific

Extension tube M48 set

$ 58.00

Omegon

Camera adaptor T2-Ring compatible with Canon EOS

$ 19.90

Omegon

40mm T2i/T2a T2 extension ring

$ 24.90

ASToptics

M54 (Female) to M48 (Male) adapter

$ 31.90

Omegon

T-Adapter M54(m)/T2(m)

$ 24.90

Omegon

7.5 mm T2i/T2a T2 extension ring

$ 19.90

Omegon

Extension tube Extender 30 mm T- thread

$ 29.90

Omegon

15mm T2i/T2a T2 extension ring

$ 24.90

Omegon

Adaptors T-2 to 1.25 nosepiece

$ 19.90

Baader

ClickLock 2" to 1.25" reducer adapter

$ 88.00

ASToptics

Extension tube M48 Fine tuning Kit - 0.5mm; 0.8mm; 1mm

$ 26.90

ASToptics

T2 extension tube - 30mm

$ 31.90

Omegon

2" extension tube

$ 19.90

Omegon

Adaptors Adapter of 2'' on T2, optical path only 3 mm

$ 34.90

Omegon

Syncfocus flip-mirror (for planetary cameras)

$ 69.00

Omegon

T-thread Extension and 2'' nosepiece 21mm

$ 19.90

Omegon

Camera adaptor T2-Ring für Nikon

$ 19.90

Omegon

T2 Cap (T cap female)

$ 19.90

PegasusAstro

Adapter M54 Male - M54 Male

$ 31.90