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Baader Conversion Ring - M68x1(M)/2"UNF(F)
The Baader Conversion Ring M68x1(M)/2"UNF(F) provides a direct and secure adaptation from a male M68x1 thread to a standard 2" UNF female thread. This simple but essential component allows you to integrate accessories with a male 2" SC (Celestron-standard) thread directly into a larger M68 optical train.
M68 Male to 2" UNF Female: Integrate 2" SC Accessories into Your M68 Train
This adapter connects accessories built for the 2" SC thread (2"-24 UNF, the Celestron standard) to an optical train built around the larger M68 thread system. Its male M68 thread screws into a female M68 port, which it turns into a 2" UNF female thread for any accessory with a male 2" SC thread. Standard 2" astronomy filters use the M48x0.75 thread, not the 2" SC thread.
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What is the primary use for the Baader M68x1(M)/2"UNF(F) Conversion Ring?
Its primary function is to let accessories with a male 2" SC (2"-24 UNF) thread be threaded into an optical system that uses M68 threads. It screws into a female M68x1 thread and presents a female 2" UNF thread, the Celestron SC standard.
Can I use this Baader conversion ring to attach a 2" eyepiece?
No, this adapter is not designed for eyepieces. It provides a female 2" SC thread (UNF), not a 2" barrel holder with compression rings or thumbscrews. To hold a 2" eyepiece, you would need an M68 to 2" eyepiece holder adapter.
Which direction does the Baader M68x1(M)/2"UNF(F) adapter thread into my system?
The adapter has an external (male) M68x1 thread on the telescope side and provides an internal 2" UNF female thread on the eyepiece side. It is designed to screw into a female M68x1 thread on your focuser, extension tube, or corrector. Once attached, it presents the 2" female threads to accept an accessory with a male 2" SC thread.
Will this Baader conversion ring add significant length to my M68 imaging train?
While any adapter adds some optical path length, this conversion ring is designed to be as thin as possible to minimize its impact on back focus. However, you must always account for its physical thickness when calculating your imaging train spacing.
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| Net weight (kg) |
0.04 |
| Compatible Brands |
Baader Planetarium, Zeiss |
| Inner Diameter / Clear Aperture (mm) |
50 |
| Outer Diameter |
65.5 |
| Type of Adapter |
Reducing Adapter |
| Optical length (mm) |
5 |
| Usage |
changes from M68 female to 2" UNFI female thread |
| Inner Connection (eyepiece/-camera-sided) |
2"/SCT Thread (50.8mm) |
| Outer Connection (lens sided) |
M68 x 1 |
| Adapters Family |
M68 System |
| Telescope-side connection |
M68x1 Male |
| Camera-side connection |
2" UNF (SCT 2"-24) Female |
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Baader Planetarium Warranty
