Is the eyepiece compatible with other filter sizes?

No, the mounting barrel of the eyepiece is internally threaded to accept only standard 1.25 filters and adapters.

Are Ultima Edge eyepieces parfocal with other brands?

No, Ultima Edge eyepieces are only parfocal within their line and do not maintain focus when swapped with parfocal eyepieces from other brands.

Do the eyecups accommodate eyeglass wearers?

Yes, the fold-down rubber eyecups and long eye relief of 16mm make viewing comfortable for both eyeglass and non-eyeglass wearers.

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Celestron

Celestron Ultima Edge - 15mm Flat Field Eyepiece - 1.25"

Item #:43505294

4.7 rating

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PKR 46331

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Availability : In Stock

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Ultra-sharp image from center to edge with generous 60° field of view and high power magnification.

Product Details

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Features & Benefits

Designed for crisp views from center to edge
60° apparent field for larger sky views
Perfect for close observation of smaller objects
Maximizes light transmission for brighter, detailed images
Switch between eyepieces without refocusing
Works with 1.25” focusers & accessories

Product Description

Celestron Ultima Edge - 15mm Flat Field Eyepiece - 1.25"

Overview

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Customer Questions & Answers

Question : Is the eyepiece compatible with other filter sizes?
Answer : No, the mounting barrel of the eyepiece is internally threaded to accept only standard 1.25 filters and adapters.
Question : Are Ultima Edge eyepieces parfocal with other brands?
Answer : No, Ultima Edge eyepieces are only parfocal within their line and do not maintain focus when swapped with parfocal eyepieces from other brands.
Question : Do the eyecups accommodate eyeglass wearers?
Answer : Yes, the fold-down rubber eyecups and long eye relief of 16mm make viewing comfortable for both eyeglass and non-eyeglass wearers.

Customer Ratings

4.7 out of 5

197 customers ratings

5 star
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4 star
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3 star
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2 star
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1 star
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Celestron Ultima Edge - 15mm Flat Field Eyepiece - 1.25"

The Celestron Ultima Edge - 15mm Flat Field Eyepiece - 1.25" has had a mixed reception from customers. Despite the poor image quality mentioned by one user, the majority of reviews praise the eyepiece's image quality, magnification, and field of view, providing a "spaceship porthole" experience. One reviewer even described it as "by far the best eyepiece I own." The flat field configuration is helpful in allowing the entire field of view to be used even at high magnifications. It is said to be suitable for viewing planets when used with a Baader HC filter, and is recommended as an upgrade to the smaller 25mm plossl. Overall, the Ultima Edge - 15mm Flat Field Eyepiece - 1.25" is a good option for those looking for an immersive viewing experience with good magnification.

Pros

Good image quality, sharp and contrasty right to the field stop
Immersive, "spaceship porthole" viewing experience
Suitable for planetary viewing when used with a Baader HC filter
Flat field configuration allows for the entire field of view to be used even at high magnifications
Satisfactory upgrade to the smaller 25mm plossl

Cons

Some customers reported poor image quality
Some difficulty when used on the external 5 to 10 degrees of a fast telescope at f4.5.

Important Information

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Celestron Ultima Edge - 15mm Flat Field Eyepiece - 1.25"

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