Celestron 1.25" & 2" Ultima Duo Eyepiece with T Thread - 17mm # 93444
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.
PERFECT FOR IMAGING
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.
SMART DESIGN FOR USE IN THE FIELD
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).
Feb 8, 2016
17mm Celestron Ultima DuoPros:
Quality Lenses,Strong Construction,Easy to UseCons:
This is a very nice EP with quality lenses and construction. It feels solid and is just that - it's pretty heavy.Bottom Line: Would you recommend this item? Yes
For me, this EP works especially well in my longer FL scopes - my f/10 refractor and C8 SCT. Wonderful to the edge with sharp star points.
Now in my short FL scopes - I have an f/5 and f/6 refractors - the viewing is not so good. These scopes already have inherent field curvature (FC) and this EP does nothing to help tame it. The views through these scope, at least for me, are not so pleasing. On axis and in the central part of the image the view is fine, but working out to the edge ... well not so good.
I would definitely recommend for longer FL scopes, not so much for short FL scopes.
This review was provided courtesy of AgenaAstro.comSort by
|Apparent Field of View||68°|
|Barrel Size||1.25" (31.7mm) and 2" (50.8mm)|
|Bolt Case Included||Yes - Free Agena Eyepiece Container|
|Bolt Case Size||Agena 65x80mm|
|Height (with Eye Guard)||109mm (4.29")|
|Max Width||57.5mm (2.26")|
|Eye Lens Diameter||30mm (1.18")|
|Eye Relief by Design||20mm|
|Filter Threads||Standard 1.25" Filter Thread (M28.5 x 0.6)|
|Rubber Eye Guard||Yes|
|Blackened Lens Edges||Yes|
|Additional Information||42mm T-Threads under eyecup|
|Eyepiece Focal Length||15.1mm - 20mm|
|Eyepiece Field of View||61 - 70 degrees|
|Eyepiece Series||Celestron Ultima Duo|
|Barrel Type||With safety undercut|
|Eyepiece Weight||12.80oz (362.87g)|