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.
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Samyang 135 mm lens
$ 166.00
Celestron
LARGE SCT & EDGEHD ADAPTER V2 FOR OFF-AXIS GUIDER
$ 55.00
TS Optics
Adaptors for Skywatcher Newton 2"
$ 63.00
Astroprints
Mounting Kit for ZWO EAF Motorfocus on UNCN2-G2 and TSRPN2 focusers
$ 89.00
PrimaLuceLab
Adaptors ESATTO 2" LP to SC
$ 106.00
PegasusAstro
Conversion Kit (SCT C11) for FocusCube & MotorFocus
$ 87.00
PrimaLuceLab
Visual Back ESATTO 2"/ARCO 2"
$ 94.00
Baader
Adaptors Diamond Steeltrack to Synta and Celetron ID 97mm
$ 47.90
TS Optics
Base for Newtonian Focusers for tubes from 190 mm
$ 35.90
PegasusAstro
Conversion Kit (Universal) for FocusCube & MotorFocus
$ 42.90
TS Optics
Adaptors Skywatcher Newton
$ 52.00
Artesky
Adaptors Skywatcher for 2" UltraLight V3 OAZ
RRP:
$ 42.90
Our price:
$ 41.90
PrimaLuceLab
Adaptors ESATTO 4" for Takahashi TOA130
$ 216.00
Starlight Instruments
FTF2015 adapter for small Meade thread
RRP:
$ 265.00
Our price:
$ 171.00
PrimaLuceLab
ESATTO 4" Takahashi FSQ-106EDX
$ 183.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Sigma Art 105mm lens
$ 166.00
PrimaLuceLab
Adapter ESATTO 3" / ARCO 3"
$ 106.00
PrimaLuceLab
ESATTO 3" Adaptors for Meade 16"
$ 327.00
Tecnosky
Retrofit 2" GSO Monorail
$ 72.00
PegasusAstro
Prodigy Adapter GSO RC 8"
$ 132.00
Starlight Instruments
Adapter VMC200L/VC200L 2.5"
RRP:
$ 464.00
Our price:
$ 338.00
PegasusAstro
Conversion Kit (SCT) for FocusCube & MotorFocus
$ 87.00
TS Optics
Adaptors M90
$ 56.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Canon EF 200/F2.8L
$ 198.00
Starlight Instruments
Adapter 3" William Optics GT102
RRP:
$ 560.00
Our price:
$ 410.00
Starlight Instruments
RC-Adapter 3" Feather Touch
RRP:
$ 530.00
Our price:
$ 389.00
PegasusAstro
Prodigy Adapter Celestron C11 & C14 EdgeHD
$ 110.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Sigma Art 85mm lens
$ 166.00
Starlight Instruments
WO FLT Adapter 3,5"
RRP:
$ 431.00
Our price:
$ 318.00
Starlight Instruments
Astro Physics thread 4.875x24TPI
RRP:
$ 431.00
Our price:
$ 318.00
Starlight Instruments
2'' Brandon focuser adapter
RRP:
$ 453.00
Our price:
$ 329.00
Starlight Instruments
Takahashi Adapter 3.5" TOA130/FS152
RRP:
$ 420.00
Our price:
$ 303.00
PrimaLuceLab
Adapter ESATTO 2" - ARCO 2"
$ 106.00
Orion Optics UK
Visual Back 2"
$ 165.00
PegasusAstro
Conversion Kit (SCT C14) for FocusCube & MotorFocus
$ 87.00
