Celestron Omni eyepiece 1.25 inch, 52° field of view 12 mm
- Omni eyepiece series 1.25 inch
- the 12 mm Omni eyepiece is a Plössl eyepiece with a four-lens, symmetrical design
- particularly interesting for deep-sky objects such as star clusters, planetary nebulae or galaxies
- blackened lens edges suppress internal reflections and increase contrast
- the multi-coating on each lens surface enables maximum contrast and light transmission
- in addition, each eyepiece is anodized twice to suppress reflections on the Body - with many other manufacturers you will find reflective surfaces instead
- you can screw all 1 1/4 inch Celestron eyepiece filters into the thread of the eyepiece barrel.
Omni series 1.25 inch - 12 mm
Many inexpensive entry-level telescopes are supplied with cheap eyepieces, which are sufficient for a first look through the telescope, but soon make you wish for something better - a small field of view or an uncomfortably short interpupillary distance make observing difficult. Simple eyepiece designs according to Kellner, Ramsden or Huygens (recognizable by abbreviations such as K, H or SR) are no longer up to date today - even if they are often advertised as "high-performance eyepieces".
Celestron offers an inexpensive alternative with the Omni eyepieces. These are Plössl eyepieces with a four-lens, symmetrical design. Blackened lens edges prevent reflections inside the eyepieces and increase contrast, while the multi-coating on each lens enables maximum contrast and light transmission. In addition, each body is anodized twice to prevent reflections - with other manufacturers you will find reflective surfaces instead.
The eyepieces are pleasantly light and offer a good field of view - it may be smaller than with the much more expensive wide-angle eyepieces, but there is also nowhere near any more annoying tunnel vision. You can screw in any 1.25 inch filters via the filter thread integrated into the eyepiece barrel, e.g. to attenuate the light when observing the moon or to use nebula filters for deep-sky observation.
A retaining groove in the receptacle prevents the eyepieces from slipping out of the focuser and falling to the ground if you swivel the telescope and the clamping screw has come loose.
The Plössl design
Plössl eyepieces are among the first modern eyepiece designs and go back to the Austrian optician Simon Plössl, who developed them back in 1860. It was not until the 1980s that the design became established, as it can be manufactured to a good quality using modern techniques and is far superior to older eyepiece designs. With an apparent field of view of around 50°, they are good, versatile eyepieces that can accompany you for many years. If you are looking for inexpensive eyepieces that are worth the money, the Celestron Omni eyepieces are a good choice.
Only at focal lengths below about 10mm does the eye relief become somewhat small due to the design - spectacle wearers in particular can use the longer focal length eyepieces in conjunction with the 2x Barlow lens. The Barlow doubles the magnification, while the pleasant viewing behavior of the longer focal length eyepieces is not changed.
The 12mm eyepiece
The 12mm model provides a medium to slightly higher magnification on most telescopes and is particularly interesting for deep-sky objects such as star clusters, planetary nebulae or galaxies: The image shows additional details due to the additional magnification without becoming too dark, and the 52° field of view shows a sufficiently large field of view so that the object is not image-filling, but still embedded in the surroundings. With the optionally available Omni 2x Barlow lens, you can achieve the higher magnification required for more compact targets such as globular clusters or planets without having to sacrifice the 8 mm eye relief.
The range of use is similar to that of the 15 mm eyepiece, but the magnification is slightly higher and the eye relief is shorter. Which focal length makes more sense for you ultimately depends on your telescope. The magnification is calculated by dividing the focal length of the telescope by that of the eyepiece; at higher magnifications, a fine gradation is more useful than at lower magnifications.
Celestron Omni eyepiece 1.25 inch, 52° field of view 12 mm
Short profile
- Omni eyepiece series 1.25 inch
- the 12 mm Omni eyepiece is a Plössl eyepiece with a four-lens, symmetrical design
- particularly interesting for deep-sky objects such as star clusters, planetary nebulae or galaxies
- blackened lens edges suppress internal reflections and increase contrast
- the multi-coating on each lens surface enables maximum contrast and light transmission
- in addition, each eyepiece is anodized twice to suppress reflections on the Body - with many other manufacturers you will find reflective surfaces instead
- you can screw all 1 1/4 inch Celestron eyepiece filters into the thread of the eyepiece barrel.
Product description for Celestron Omni eyepiece 1.25 inch, 52° field of view 12 mm
Omni series 1.25 inch - 12 mm
Many inexpensive entry-level telescopes are supplied with cheap eyepieces, which are sufficient for a first look through the telescope, but soon make you wish for something better - a small field of view or an uncomfortably short interpupillary distance make observing difficult. Simple eyepiece designs according to Kellner, Ramsden or Huygens (recognizable by abbreviations such as K, H or SR) are no longer up to date today - even if they are often advertised as "high-performance eyepieces".
Celestron offers an inexpensive alternative with the Omni eyepieces. These are Plössl eyepieces with a four-lens, symmetrical design. Blackened lens edges prevent reflections inside the eyepieces and increase contrast, while the multi-coating on each lens enables maximum contrast and light transmission. In addition, each body is anodized twice to prevent reflections - with other manufacturers you will find reflective surfaces instead.
The eyepieces are pleasantly light and offer a good field of view - it may be smaller than with the much more expensive wide-angle eyepieces, but there is also nowhere near any more annoying tunnel vision. You can screw in any 1.25 inch filters via the filter thread integrated into the eyepiece barrel, e.g. to attenuate the light when observing the moon or to use nebula filters for deep-sky observation.
A retaining groove in the receptacle prevents the eyepieces from slipping out of the focuser and falling to the ground if you swivel the telescope and the clamping screw has come loose.
The Plössl design
Plössl eyepieces are among the first modern eyepiece designs and go back to the Austrian optician Simon Plössl, who developed them back in 1860. It was not until the 1980s that the design became established, as it can be manufactured to a good quality using modern techniques and is far superior to older eyepiece designs. With an apparent field of view of around 50°, they are good, versatile eyepieces that can accompany you for many years. If you are looking for inexpensive eyepieces that are worth the money, the Celestron Omni eyepieces are a good choice.
Only at focal lengths below about 10mm does the eye relief become somewhat small due to the design - spectacle wearers in particular can use the longer focal length eyepieces in conjunction with the 2x Barlow lens. The Barlow doubles the magnification, while the pleasant viewing behavior of the longer focal length eyepieces is not changed.
The 12mm eyepiece
The 12mm model provides a medium to slightly higher magnification on most telescopes and is particularly interesting for deep-sky objects such as star clusters, planetary nebulae or galaxies: The image shows additional details due to the additional magnification without becoming too dark, and the 52° field of view shows a sufficiently large field of view so that the object is not image-filling, but still embedded in the surroundings. With the optionally available Omni 2x Barlow lens, you can achieve the higher magnification required for more compact targets such as globular clusters or planets without having to sacrifice the 8 mm eye relief.
The range of use is similar to that of the 15 mm eyepiece, but the magnification is slightly higher and the eye relief is shorter. Which focal length makes more sense for you ultimately depends on your telescope. The magnification is calculated by dividing the focal length of the telescope by that of the eyepiece; at higher magnifications, a fine gradation is more useful than at lower magnifications.
Celestron Omni eyepiece 1.25 inch, 52° field of view 12 mm
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