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.
Celestron
LARGE SCT & EDGEHD ADAPTER V2 FOR OFF-AXIS GUIDER
$ 51.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Sigma Art 105mm lens
$ 158.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Samyang 135 mm lens
$ 158.00
Astroprints
Mounting Kit for ZWO EAF Motorfocus on UNCN2-G2 and TSRPN2 focusers
$ 84.00
PegasusAstro
Prodigy Adapter GSO RC
$ 125.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Canon EF 200/F2.8L
$ 188.00
Starlight Instruments
FTF2015 adapter for small Meade thread
RRP:
$ 251.00
Our price:
$ 162.00
PrimaLuceLab
Adaptors ESATTO 2" LP to SC
$ 100.00
Starlight Instruments
Adapter VMC200L/VC200L 2.5"
RRP:
$ 440.00
Our price:
$ 321.00
TS Optics
Adaptors for Skywatcher Newton 2"
$ 60.00
TS Optics
Adaptors Skywatcher Newton
$ 49.90
PrimaLuceLab
Adaptors ESATTO 4" for Takahashi TOA130
$ 205.00
PrimaLuceLab
Adapter ESATTO 3" / ARCO 3"
$ 100.00
Tecnosky
Retrofit 2" GSO Monorail
$ 69.00
TS Optics
Adaptors M117
$ 63.00
PegasusAstro
Conversion Kit (SCT) for FocusCube & MotorFocus
$ 82.00
TS Optics
Adaptors M90
$ 53.00
PrimaLuceLab
ESATTO 4" Takahashi FSQ-106EDX
$ 174.00
PrimaLuceLab
ESATTO 4" Takahashi FSQ-106
$ 174.00
PrimaLuceLab
Visual Back ESATTO 2"/ARCO 2"
$ 90.00
PrimaLuceLab
ESATTO 3" Adaptors for Meade 16"
$ 310.00
Starlight Instruments
RC-Adapter 3" Feather Touch
RRP:
$ 510.00
Our price:
$ 369.00
Starlight Instruments
Adapter 3" William Optics GT102
RRP:
$ 530.00
Our price:
$ 389.00
PegasusAstro
Prodigy Adapter GSO RC 8"
$ 125.00
Starlight Instruments
2'' Brandon focuser adapter
RRP:
$ 430.00
Our price:
$ 312.00
Starlight Instruments
WO FLT Adapter 3,5"
RRP:
$ 409.00
Our price:
$ 302.00
Starlight Instruments
Astro Physics thread 4.875x24TPI
RRP:
$ 409.00
Our price:
$ 302.00
Starlight Instruments
Takahashi Adapter 3.5" TOA130/FS152
RRP:
$ 398.00
Our price:
$ 288.00
Orion Optics UK
Visual Back 2"
$ 157.00
TS Optics
Adaptors GSO, TS Photon
$ 47.90
Baader
Adaptors Diamond Steeltrack to Synta and Celetron ID 97mm
$ 45.90
Starlight Instruments
Adaptors 3" for Takahashi FS128
$ 314.00
Starlight Instruments
Adapter Takahashi FSQ85
RRP:
$ 356.00
Our price:
$ 261.00
Astroprints
EAF motor attachment kit with clamp, rail and finder base for Sigma Art 85mm lens
$ 158.00
Starlight Instruments
Focuser adapter for Meade 10", 12” and 14" SC telescopes
RRP:
$ 325.00
Our price:
$ 236.00
