DARK CLEAR SKIES · IMAGING ADAPTERS
Connect M54 and M68 components
The DCS M54 Male to M68 Female Adapter combines an M54 × 0.75 mm external thread with an M68 × 1 mm internal thread. Its specified 17.5 mm back-focus length lets you account for this connection when planning the spacing in your astrophotography setup.
Match both sides of your connection
Choose this adapter when the two components you need to join have the matching threads below. Check the diameter, pitch and gender on each component, as all three must agree.
| On this adapter | Matching component required |
|---|---|
| M54 × 0.75 male | M54 × 0.75 female |
| M68 × 1 female | M68 × 1 male |
Use the stated interfaces to check suitability for your camera-side or telescope-side accessories. Compatibility depends on the actual connections, available clearance and thread engagement in your setup.
Allow 17.5 mm in your spacing budget
Include the adapter's 17.5 mm back-focus contribution when calculating the distance to your camera sensor. Account for the rest of the imaging train, including any filter wheel, off-axis guider, spacers and the camera's own sensor distance.
Check the required spacing and reference surface specified for your reducer, flattener or telescope. The 17.5 mm figure describes this adapter's contribution; the complete system's required spacing must be established separately.
Specifications
| Brand | Dark Clear Skies |
|---|---|
| Product type | Threaded imaging adapter |
| External thread | M54 × 0.75 mm · male |
| Internal thread | M68 × 1 mm · female |
| Specified back-focus length | 17.5 mm |
| DCS SKU | DCS-M54M-M68F-175 |
Fitting the adapter
Confirm the mating threads before assembly. Keep the parts square, start the connection gently by hand and stop if you feel resistance. Check that both components seat correctly and that the assembled spacing suits your optical system.
Complete your imaging connection
Browse adapters and extension tubes for other thread combinations and spacing options.
