1 / 61.25" Adapters for OTI Quantum 4 Telescope
Brand: OTI Quantum 4
In stock
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- Ships from
- US
- Format
- Buy It Now
Sold by
astroscan_man
1,752 feedback · 100.0 positive
Specifications
- Item
- Top Port Adapter
- Brand
- OTI Quantum 4
- Type
- Adapter
- Item Diameter
- 1.25 in
- Country of Origin
- China
About this product
This listing is for a 3D printed adapter that will thread into the designated port of the OTI Quantum 4 telescope allowing 1.25" accessories to be used; eyepieces, barlows, diagonals, cameras, etc. The adapter is printed in strong and durable PETG Carbon Fiber. It includes a metal thumbscrew with brass compression ring…Read full descriptionShow less
This listing is for a 3D printed adapter that will thread into the designated port of the OTI Quantum 4 telescope allowing 1.25" accessories to be used; eyepieces, barlows, diagonals, cameras, etc. The adapter is printed in strong and durable PETG Carbon Fiber. It includes a metal thumbscrew with brass compression ring to retain the accessory without damaging or marking the item.
Please message if you'd like to inquire if these fit the Q6 or larger.
Dimensions:
Overall Height: ~43
Flared Width: 42.5mm
Body Width: 36mm
1.25" Internal Depth: 35mm
Threads: Axial: 1 1/4" x 28tpi, Top: ~1 1/8" x 24 tpi
Thread depth: 4.75mm
Opening at threads: 26mm (axial), 24mm (top)
Weight: 26g
*Reminder* - This part is 3d printed and the threads on this adapter are plastic, while they are strong and accurate, it is easier to cross-thread this item and permanently damage the threads than with a metal part. Take great care when threading this on; I like to turn it counterclockwise until you feel it click into the first thread, then rotate clockwise to tighten. If you feel strong resistance, stop immediately and try it again. If it is too tight no matter what, make sure your female threads do not have any gunk, dirt, grease, dust embedded into the threads (my scope did, I was able to clean them out with a small dental tool or the appropriate thread pitch guage).
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Compare offers
1 listing from 1 seller. Prices update periodically. Only one listing of this exact product was found; more sellers appear here as they are discovered.
- Lowest price
- $29.99
- Offers
- 1from 1 seller
| Seller | Condition | Ships from | Price | Shipping | Delivery & returns | Total | |
|---|---|---|---|---|---|---|---|
astroscan_man via eBay 100% positive · 1,752 ratings Highly rated seller | New | United States | $29.99Lowest price | Free | Est. Oct 17 – Oct 20 | $29.99 | View Deal |
Seller ratings are the feedback eBay reports for each seller. "Highly rated" means at least 98% positive from at least 100 ratings. Total = price + shipping, shown only when the listing states its shipping cost.
Price history
Lowest price available each day, tracked since Oct 7, 2026 (22 days).
- Current lowest
- $29.99
- Previous price
- No change yet
- Lowest recorded
- $29.99
- Highest recorded
- $29.99
- Trend
- → Stable
- since Oct 7
The lowest price for all conditions has not changed in this period, so there is no trend to chart yet.
History is built only from prices this site observed, starting the day tracking began; nothing is estimated or back-filled. Each point is the lowest price among the offers available that day. Shipping, duties and taxes are not included.







