Celestron 1.25" Ultima Edge Flat Field Eyepiece - 18mm
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.
- 18mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers
- Incredibly crisp views from center to edge of field
- Fully multi-coated, 8-element lens design for excellent light transmission
- Wide 65° apparent field of view allows you to see more of the night sky
- Generous 20mm eye relief and fold-down rubber eyeguard for comfortable viewing with or without eyeglasses
- Molded rubber grip ring for non-slip handling
See the whole picture with Ultima Edge. These flat-field eyepieces were designed to provide an ultra-sharp, ultra-clear, crisp image from the center all the way to the edge of the field of view. The 18mm Ultima Edge eyepiece features fully multi-coated optics and an 8- element lens design, maximizing light transmission.
The Ultima Edge 18mm has a generous 65° field of view perfect for viewing planets, stars and the Moon’s surface. This eyepiece provides higher-powered magnification, perfect for those times when you want to get up close to smaller objects.
Body
The 18mm Ultima Edge eyepiece’s main housing is machined from high grade aluminum with a black anodized outer surface.
Its 1.25" mounting barrel is internally threaded to accept standard 1.25" filters and adapters. It is compatible with 1.25” star diagonals and focusers. On the exterior of the eyepiece, you will find a uniquely designed, molded rubber grip ring for non-slip handling during observing sessions.
Viewing through the 18mm Ultima Edge eyepiece is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the rubber eyecups and long eye relief of 20mm.
Convenient Parfocal Design
Spend more time observing and less time focusing! When you buy more than one Ultima Edge eyepiece, you can switch between them without refocusing thanks to their parfocal design. With a set of Ultima Edge eyepieces in your kit, you'll be able to enjoy a wide range of high and low power views—and switch between them quickly and easily. That means you can get more out of every observing session.
Other Information
- Country of Manufacture: China
- Celestron Warranty: Two-year factory limited warranty (within US/Canada only).
See the whole picture with Ultima Edge. These flat-field eyepieces were designed to provide an ultra-sharp, ultra-clear, crisp image from the center all the way to the edge of the field of view. The 18mm Ultima Edge eyepiece features fully multi-coated optics and an 8- element lens design, maximizing light transmission.
The Ultima Edge 18mm has a generous 65° field of view perfect for viewing planets, stars and the Moon’s surface. This eyepiece provides higher-powered magnification, perfect for those times when you want to get up close to smaller objects.
Body
The 18mm Ultima Edge eyepiece’s main housing is machined from high grade aluminum with a black anodized outer surface.
Its 1.25" mounting barrel is internally threaded to accept standard 1.25" filters and adapters. It is compatible with 1.25” star diagonals and focusers. On the exterior of the eyepiece, you will find a uniquely designed, molded rubber grip ring for non-slip handling during observing sessions.
Viewing through the 18mm Ultima Edge eyepiece is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the rubber eyecups and long eye relief of 20mm.
Convenient Parfocal Design
Spend more time observing and less time focusing! When you buy more than one Ultima Edge eyepiece, you can switch between them without refocusing thanks to their parfocal design. With a set of Ultima Edge eyepieces in your kit, you'll be able to enjoy a wide range of high and low power views—and switch between them quickly and easily. That means you can get more out of every observing session.
- 18mm parfocal Ultra Flat Field eyepiece designed for 1.25” focusers
- Incredibly crisp views from center to edge of field
- Fully multi-coated, 8-element lens design for excellent light transmission
- Wide 65° apparent field of view allows you to see more of the night sky
- Generous 20mm eye relief and fold-down rubber eyeguard for comfortable viewing with or without eyeglasses
- Molded rubber grip ring for non-slip handling
See the whole picture with Ultima Edge. These flat-field eyepieces were designed to provide an ultra-sharp, ultra-clear, crisp image from the center all the way to the edge of the field of view. The 18mm Ultima Edge eyepiece features fully multi-coated optics and an 8- element lens design, maximizing light transmission.
The Ultima Edge 18mm has a generous 65° field of view perfect for viewing planets, stars and the Moon’s surface. This eyepiece provides higher-powered magnification, perfect for those times when you want to get up close to smaller objects.
Body
The 18mm Ultima Edge eyepiece’s main housing is machined from high grade aluminum with a black anodized outer surface.
Its 1.25" mounting barrel is internally threaded to accept standard 1.25" filters and adapters. It is compatible with 1.25” star diagonals and focusers. On the exterior of the eyepiece, you will find a uniquely designed, molded rubber grip ring for non-slip handling during observing sessions.
Viewing through the 18mm Ultima Edge eyepiece is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the rubber eyecups and long eye relief of 20mm.
Convenient Parfocal Design
Spend more time observing and less time focusing! When you buy more than one Ultima Edge eyepiece, you can switch between them without refocusing thanks to their parfocal design. With a set of Ultima Edge eyepieces in your kit, you'll be able to enjoy a wide range of high and low power views—and switch between them quickly and easily. That means you can get more out of every observing session.
Other Information
- Country of Manufacture: China
- Celestron Warranty: Two-year factory limited warranty (within US/Canada only).
| Product Status | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Eyepiece Series | Celestron Ultima Edge |
| Focal Length | 18mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 65° |
| Eye Relief (Designed) | 20mm (.78") |
| Filter Threads | Standard 1.25" Filter Thread (M28.5 x 0.6) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 8 |
| Lens Groups | 5 |
| Barrel Type | Tapered barrel |
| Protective Plastic Storage Container | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size | Agena 52x80mm |
| Optical Design | Proprietary |
| Height (Without Eyeguard) | 81mm |
| Maximum Width | 50.9mm |
| End Caps | 2 |
| Eye Lens Diameter | 27.0mm |
| Field Stop Diameter | 23.4mm (.93") |
| Parfocal | Yes |
| Rubber Eye Guard | Yes - roll up |
| Weight | 7.5 oz |
| Hide Found a better Shipped Price on Frontend? | No |
Celestron 1.25" Ultima Edge Flat Field Eyepiece - 18mm