Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 5mm # 93440

Our Price: $109.95
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In stock (10+ Available)
Ships by Next Business Day
Our Product ID: E-CE-93440
Manufacturer SKU: 93440
Item Can Ship: To US / Canada Only
Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 5mm # 93440

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  • Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 5mm # 93440
  • Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 5mm # 93440
  • Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 5mm # 93440
  • Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 5mm # 93440

Website Special - FREE Agena plastic bolt case / storage container included with this eyepiece (a $6 value)!

Product Details

Get a new perspective on the Universe with Ultima Duo, Celestron's versatile new eyepieces that combine excellent optics with a built-in T-adapter for astroimaging.

Enjoy impressive views with a wide 68-degree apparent field of view. Celestron's fully multi-coated optics increase light transmission and contrast, while blackened lens edges prevent internal reflections. The result is bright, pinpoint stars on a black field. A generous 20mm of eye relief and fold-down rubber eyeguard make Ultima Duo comfortable to use without removing eyeglasses.


If you're interested in imaging through the eyepiece, Ultima Duo makes the process quick and easy. Unlike competitors' eyepieces, you won't need to spend money on expensive adapters for your camera. The industry-standard 42mm T-threads are integrated for a direct, secure connection to your DSLR or astronomical CCD camera. Just remove the rubber eyeguard to expose Ultima Duo's integral T-threads. Then attach your DSLR camera with compatible T-ring (not included) and you're ready to capture crystal clear images! Ultima Duo is ideal for imaging bright solar system objects like the rings of Saturn, craters on the Moon, and Jupiter's Great Red Spot.

Imaging the Moon and planets is even easier with Celestron's Smartphone Adapter for Ultima Duo (sold separately). Unlike "universal" adapters, the Celestron Smartphone Adapter is custom-fit for the Ultima Duo eyepiece line. With this sturdy connection, your smartphone can capture crisp, sharp images of your favorite solar system objects.

Advanced planetary imagers can attach Celestron's T-to-C Adapter (sold separately) and add a number of high-end imagers to Ultima Duo, including Celestron's Skyris and NexImage Burst cameras.


Ultima Duo's anodized aluminum body allows it to fit both 1.25" and 2" focusers, so you can use it with almost any telescope with no extra adapters required. A compact body style makes Ultima Duo an excellent choice for use with binoviewers.

The rubber grip rings provide good ergonomics so you can hold onto your eyepiece, even while wearing gloves. The aluminum barrel is threaded to accept 1.25" eyepiece filters (but not 2" filters) and has a safety recess to prevent it from slipping out of the focuser. Each Ultima Duo eyepiece includes cover caps and a protective carry pouch.

Product carries full 2 year Celestron factory limited warranty (within US/Canada only).

Eyepiece Series Ultima Duo
Focal Length 5mm
Barrel Size 1.25" (31.7mm) and 2" (50.8mm)
Apparent Field of View (Mfg Specified) 68°
Eye Relief (Designed) 20mm
Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
Coatings Fully Multi-Coated
Lens Elements 8
Lens Groups 5
Blackened Lens Edges Yes
Barrel Safety Recess Yes
Barrel Type With safety undercut
Protective Plastic Storage Container Yes - Free Agena Eyepiece Container
Protective Plastic Storage Container Size Agena 65x120mm
Height (With Eyeguard Extended) 130mm (5.12")
Maximum Width 57.5mm (2.26")
End Caps 2
Eye Lens Diameter 30mm (1.18")
Rubber Eye Guard Yes
Warranty Full 2-year manufacturer's limited factory warranty (within US/Canada only).
Weight 13.2 oz (374 g)
Misc. Information 42mm T-Threads under eyecup

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