Adapters
The coupling between camera and telescope
With the right adapters, T-rings and spacers, you'll set any setup light-tight and to exact backfocus. Choose from M42, M48, M54 and M68 connectors for a stable, backlash-free connection. Available directly from stock and delivered within 48 hours.
Showing 81–100 of 122 resultsSorted by popularity
Showing 81–100 of 122 resultsSorted by popularity
Adapters: the smart links in your setup
Adapters are the “LEGO blocks” of astronomy. They match threads, bayonets and tube diameters so that every component - from DSLR camera to filter wheel - works seamlessly with your telescope.
1. Why can't you live without it?
| Advantage | What it does for you |
|---|---|
| Universal coupling | Put a Canon DSLR, smartphone or planetary camera on the same focuser with no problem. |
| Tight alignment | Keeps light nicely centered, keeping stars pointed. |
| Exact distance | With intermediate rings, you tune the sensor distance down to the millimeter (backfocus). |
| Super fast changeover | One click and you go from visual observation to photography. |
2. Popular adapter types & their uses.
| Adapter | Simple example |
|---|---|
| T-ring + T-2 | Put a DSLR or system camera on your focuser. |
| M42 → T-2 | Fits old M42 lenses or cameras to modern mounts. |
| 1¼″ → 2″ / 2″ → 1¼″ | Switch between eyepieces and filters of different size. |
| Smartphone holder | Clip your phone for quick moon or planet photos. |
| Filter wheel spacer | Set a filter wheel at exactly the right light distance. |
| C-/CS-mount | Mount planetary or guiding cameras directly on the focuser. |
3. What do you look for in materials & accuracy?
Aluminum body + Delrin collar - Light, strong and prevents scratches.
Stainless steel thread - Runs smoothly, hardly wears out.
Precision tolerance ≤ 0.05 mm - No perceptible backlash, so tight star images.
4. Here's how to adjust the right backfocus
Check factory specification → read how much mm your flattener or camera needs.
Choose spacer rings → stack 5 mm, 10 mm or 15 mm rings until you come out exactly.
Test in daylight → build the chain on the kitchen table, slide everything in and out to feel if it clicks.
Avoid ‘towers’ → too many rings weaken the structure and may cause additional reflections.
5. Quick tips for astrophoto & EAA
Photo Setup: OTA → reducer/flattener → filter wheel → T-ring → camera.
EAA setup: OTA → C-mount adapter → EAA camera, as short as possible.
Cleaning: blower, soft cloth, drop of isopropyl; no scouring pad or kitchen paper.
20 frequently asked questions about adapters
| # | Question | Short answer |
|---|---|---|
| 1 | What adapter do I need for my Canon DSLR? | A Canon T-ring + T-2-to-focuser ring. |
| 2 | How do I calculate backfocus? | Manufacturer's value (e.g., 55 mm) minus thicknesses of all spacers. |
| 3 | Can I stack two adapters? | Yes, but keep the chain as short as possible for strength. |
| 4 | M42 and T-2 seem to be the same, right? | Same diameter (42 mm), different screw pitch. |
| 5 | Do I need 2″-to-1¼″ for my filter wheel? | Only if the wheel has 2″ filters and your focuser is 1¼″. |
| 6 | How do I avoid backlash? | Choose precision adapters and use collar or anti-grip rings. |
| 7 | Does Velcro mounting fit heavy optics? | No, only on light smartphone holders. |
| 8 | Can I clean aluminum adapters with alcohol? | Yes, soft cloth + isopropyl, no abrasives. |
| 9 | How do I store my adapters? | In a foam case, sorted by diameter. |
| 10 | Why Delrin in the collar? | Protects anodization layer, runs smoothly without scratching. |
| 11 | Plastic adapters, good idea? | For light work okay; for photos prefer metal. |
| 12 | Connecting C-mount camera? | C-mount to T-2 adapter + intermediate ring if needed. |
| 13 | What exactly does a T-ring do? | Convert your camera bayonet to standard T-2 threads. |
| 14 | Where can I find propeller pitch info? | In the manual or on your focuser manufacturer's website. |
| 15 | Loosening stuck adapters? | Grippad + a little silicone grease along the edge. |
| 16 | Are SCT adapters different? | With SCT/Maksutov you have to pay extra attention to proper back focus. |
| 17 | Can I 3D print an adapter? | Not for precision; print plastic lacks dimensional stability. |
| 18 | Keeping dust free? | Bellows + lens pen, store in sealed box. |
| 19 | Do I need autoguider adapter? | Only if your guider camera has a different mount. |
| 20 | Labeling adapters? | Use fine permanent marker or small tape labels. |
With the right adapters, you'll have any combination working in seconds - from photography to visual enjoyment. Choose precision, set your backfocus properly and experience the difference in razor-sharp, perfectly aligned constellations!
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