Antares 2" to 1.25" Twist-Lock Eyepiece Adapter

Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available.
- This item is out of stock.
- We have no ETA from the manufacturer at this time.
- Sign up for back-in-stock alerts to be notified when this item becomes available.
Lower 48 States:
Orders over $50 ship free within the Lower 48 using a carrier and service we select based on your items and delivery location. Faster shipping options may be available at checkout.
U.S. Outside the Lower 48 (AK, HI, PR):
Free shipping on orders over $50 applies to many—but not all—items. Add items to your cart and enter your ZIP code to see available shipping options and any costs.
International Orders:
Free shipping does not apply to international orders. You’ll see available shipping options and costs during checkout. Some items can’t be shipped internationally due to size or manufacturer restrictions. Duties, taxes, brokerage fees, and tariffs are not included and are the customer’s responsibility.
Now back in stock after a long time, and with new, updated look!
Forget about fumbling for thumbscrews in the dark. With this innovative 2"-1.25" low-profile eyepiece adapter from Antares, just twist the silver lock ring and your 1.25" eyepiece, camera nosepiece, or laser collimator is centered precisely in your 2" focuser! Standard 1.25" adapters use a thumbscrew which pushes the inserted accessory to one side when tightened - not so with this adapter.
They've thought of everything:
- Helical centering and compression mechanism
- 0.6" long compression band to nicely grip all eyepieces, including those with nosepieces that have a tapered barrel or safety groove
- Knurled twist-lock ring
- Threaded to accept standard 2" (48mm) filters (However, see important note below about this)
- Polypropylene compression ring will not mar your eyepieces
- All metal construction (except for the compression ring)
And that's not all. Unscrewing the silver lock ring exposes a male T-thread on the lower black barrel, which conveniently functions as a 2" prime focus (2"-to-T Thread) adapter by itself. So you're actually getting two adapters for the price of one! You'll want one for every scope!
The total height of this adapter is 33mm (1.3"). Its optical length is 11mm (0.43"). Also, if you use eyepieces with a long barrel with a 2" filter screwed on this accessory, be careful not to hit the filter with the eyepiece. To alleviate this problem, you can attach a 2" spacer ring (not included) to the Twist-Lock adapter to increase its overall length.
Weight = 3.4oz (96g).
A word about the M48 female and T male threads on this adapter:
Antares' threads are, in general, roughly cut on virtually all of their products. They may show anodizing wear spots, or they're may not be uniform in appearance, or they may be sharp-edged. These threads should work with many compatible accessories, but the connection may not be smooth or complete.
These products are well priced and very good for the money, but you may want to look elsewhere if you are looking for perfection or precision machining. If you decide to return this item because of this after purchase, we will be happy to take it back for a refund as per our standard return terms, but will not treat this issue as a defect since this is being disclosed and explained in detail here. That's just the way Antares makes their products.
Other Information
- Country of Manufacture: Canada
Now back in stock after a long time, and with new, updated look!
Forget about fumbling for thumbscrews in the dark. With this innovative 2"-1.25" low-profile eyepiece adapter from Antares, just twist the silver lock ring and your 1.25" eyepiece, camera nosepiece, or laser collimator is centered precisely in your 2" focuser! Standard 1.25" adapters use a thumbscrew which pushes the inserted accessory to one side when tightened - not so with this adapter.
They've thought of everything:
- Helical centering and compression mechanism
- 0.6" long compression band to nicely grip all eyepieces, including those with nosepieces that have a tapered barrel or safety groove
- Knurled twist-lock ring
- Threaded to accept standard 2" (48mm) filters (However, see important note below about this)
- Polypropylene compression ring will not mar your eyepieces
- All metal construction (except for the compression ring)
And that's not all. Unscrewing the silver lock ring exposes a male T-thread on the lower black barrel, which conveniently functions as a 2" prime focus (2"-to-T Thread) adapter by itself. So you're actually getting two adapters for the price of one! You'll want one for every scope!
The total height of this adapter is 33mm (1.3"). Its optical length is 11mm (0.43"). Also, if you use eyepieces with a long barrel with a 2" filter screwed on this accessory, be careful not to hit the filter with the eyepiece. To alleviate this problem, you can attach a 2" spacer ring (not included) to the Twist-Lock adapter to increase its overall length.
Weight = 3.4oz (96g).
A word about the M48 female and T male threads on this adapter:
Antares' threads are, in general, roughly cut on virtually all of their products. They may show anodizing wear spots, or they're may not be uniform in appearance, or they may be sharp-edged. These threads should work with many compatible accessories, but the connection may not be smooth or complete.
These products are well priced and very good for the money, but you may want to look elsewhere if you are looking for perfection or precision machining. If you decide to return this item because of this after purchase, we will be happy to take it back for a refund as per our standard return terms, but will not treat this issue as a defect since this is being disclosed and explained in detail here. That's just the way Antares makes their products.
Now back in stock after a long time, and with new, updated look!
Forget about fumbling for thumbscrews in the dark. With this innovative 2"-1.25" low-profile eyepiece adapter from Antares, just twist the silver lock ring and your 1.25" eyepiece, camera nosepiece, or laser collimator is centered precisely in your 2" focuser! Standard 1.25" adapters use a thumbscrew which pushes the inserted accessory to one side when tightened - not so with this adapter.
They've thought of everything:
- Helical centering and compression mechanism
- 0.6" long compression band to nicely grip all eyepieces, including those with nosepieces that have a tapered barrel or safety groove
- Knurled twist-lock ring
- Threaded to accept standard 2" (48mm) filters (However, see important note below about this)
- Polypropylene compression ring will not mar your eyepieces
- All metal construction (except for the compression ring)
And that's not all. Unscrewing the silver lock ring exposes a male T-thread on the lower black barrel, which conveniently functions as a 2" prime focus (2"-to-T Thread) adapter by itself. So you're actually getting two adapters for the price of one! You'll want one for every scope!
The total height of this adapter is 33mm (1.3"). Its optical length is 11mm (0.43"). Also, if you use eyepieces with a long barrel with a 2" filter screwed on this accessory, be careful not to hit the filter with the eyepiece. To alleviate this problem, you can attach a 2" spacer ring (not included) to the Twist-Lock adapter to increase its overall length.
Weight = 3.4oz (96g).
A word about the M48 female and T male threads on this adapter:
Antares' threads are, in general, roughly cut on virtually all of their products. They may show anodizing wear spots, or they're may not be uniform in appearance, or they may be sharp-edged. These threads should work with many compatible accessories, but the connection may not be smooth or complete.
These products are well priced and very good for the money, but you may want to look elsewhere if you are looking for perfection or precision machining. If you decide to return this item because of this after purchase, we will be happy to take it back for a refund as per our standard return terms, but will not treat this issue as a defect since this is being disclosed and explained in detail here. That's just the way Antares makes their products.
Other Information
- Country of Manufacture: Canada
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |

Antares 2" to 1.25" Twist-Lock Eyepiece Adapter


















