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.
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William Optics
M63 Adapter für Flattener Flat6AIII
$ 66.00
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iOptron
iPolar adapter for CGEM/EQ6/AZ-EQ6
RRP:
$ 66.00
Our price:
$ 64.00
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Artesky
Adapter für Star Adventurer Polsucher
$ 33.90
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TeleVue
M54 Camera Adapter
$ 77.00
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TS Optics
Adapter M68/TSGPU Koma Korrektor
$ 100.00
Sale price:
$ 87.86
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Baader
Inverter Ring M54
$ 35.90
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Baader
Adapter ZEISS-Diascope auf Mark IV Zoomokular
$ 57.00
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Baader
M68a Umkehrring
$ 44.90
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Baader
Inverter Ring M54
$ 57.00
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Artesky
SC Adapter 2" UltraLight V3
$ 42.90
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Artesky
SC Adapter 2,5" UltraLight V3
$ 55.00
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Baader
M68a Umkehrring
$ 45.90
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Baader
Umkehrring SC
$ 33.90
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Optec
TCF-S Adapter M117 x 1mm
$ 289.00
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