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.

Astronomy

Type: Adaptors

Omegon

2“ Extension tube, 35mm optical path

$ 29.90

Omegon

Camera adaptor T2-Ring compatible with Canon EOS

$ 19.90

Omegon

Adaptors T-2 to 1.25 nosepiece

$ 19.90

Omegon

2'' - 1.25'' Twist-lock adapter

$ 79.00

Omegon

Camera adaptor T2-Ring für Nikon

$ 19.90

Omegon

2'' extension tube with 50mm optical path

$ 39.90

Omegon

1.25'', 30mm extension tube

$ 19.90

Omegon

2'' extension tube, 80mm optical path

$ 49.90

Omegon

Syncfocus flip-mirror (for planetary cameras)

$ 69.00

Omegon

Camera adapter 1.25"

$ 24.90

Explore Scientific

Extension tube M48 set

$ 63.00

ASToptics

M54 (Female) to M48 (Male) adapter

$ 34.90

Omegon

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

$ 34.90

Omegon

2'' Twist-lock adapter

$ 99.00

Omegon

M43 / T2 T-adapter

$ 19.90

Omegon

T2 to 1.25'' adapter

$ 29.90

Omegon

Extension tube 45mm Extender 2''

$ 29.90

Omegon

40mm T2i/T2a T2 extension ring

$ 24.90

ASToptics

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

$ 28.90

Omegon

flip mirror

$ 119.00

ASToptics

Extension Tube M48 Filter thread - 4mm Length

$ 22.90

Omegon

2'' to 1.25" reducer adapter

$ 39.90

Omegon

Adaptors 1.25'', 30mm extension tube

$ 24.90

Omegon

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

$ 24.90

Baader

ClickLock 2" to 1.25" reducer adapter

$ 95.00

Artesky

Adapter Twist Lock 2" (Skywatcher Newton)

$ 113.00