Cometron 114AZ, 4.5" altazimuth reflector

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The Celestron Cometron 114AZ altazimuth reflector provides even beginning stargazers with stunning wide angle views of comets, the rings of Saturn, the bands of Jupiter and its four Galillean moons, star clusters, nebulas, galaxies, and more. And it does it all without costing you a fortune.

The Celestron Cometron 114AZ is lightweight and portable, making it a great grab-and-go telescope for spur-of-the-moment observing. It has a simple design that makes it easy for beginners to use, and its no-tool setup means you are up and observing in no time. Two high-quality Kellner eyepieces are included to enhance your views. The simple Newtonian reflector optical design, altazimuth mount, and included red-dot finderscope make it easy to navigate the night sky. A steel tripod provides stability.

The Cometron 114AZ reflector has a parabolic primary mirror, just like the most expensive reflectors. This design provides sharp images without the annoying spherical aberration found in lesser spherical mirror scopes. It has a generous 114mm aperture that gathers 265 times as much light as the sharpest eye. This provides bright, sharp views of faint celestial objects and shows the Moon’s mountains and craters in crisp detail. And, thanks to its wide field of view, you’ll be able to observe comets and even favorite deep-sky objects like the Orion Nebula.

Weighing just 8.4 pounds, including tripod, the Celestron Cometron 114AZ is a telescope that you can pick up with one hand and take out to observe whenever the urge strikes you.

This Cometron 114AZ’s Optical System . . .

Reflector optical tube: 114mm (4.5”) aperture 450mm focal length f/3.95 parabolic mirror Newtonian reflector. Aluminum tube construction, 18" long. The mirrors are aluminized for high light transmission and overcoated with durable silicon dioxide (quartz) for long life.

Rack and pinion focuser: The 1.25” focuser has dual focusing knobs for precise image control with either hand. The large focus knobs are easy to operate, even while wearing gloves or mittens in cold weather.

Two eyepieces: You get two 1.25" Kellner eyepieces: a 20mm (22.5x) with a 2° field of view (four times the diameter of the full Moon for wide angle views) and a 10mm (45x) with a 1° field of view (twice the diameter of the full Moon for more close-up views). Both eyepieces have antireflection coatings on their lens surfaces for sharp images and good contrast.

Finder: Star Pointer non-magnifying illuminated variable brightness red dot-type. The Star Pointer is the quickest and easiest way to point your telescope exactly to the desired object in the sky. It seems to project a red dot onto the night sky. Just align the red dot seen through the Star Pointer with the desired object in the sky. It’s that easy. 

This Cometron 114AZ’s Mount . . .

Altazimuth mount: The altazimuth mount with camera tripod-style pan handle provides right/left and up/down motions suitable for casual astronomical observing. A simple twist on the pan handle locks the scope in place, as well as letting you adjust the friction to set the travel smoothness when following objects across the heavens. The optical tube is well balanced, but keeping your hand on the pan handle at all times when the handle is unlocked would be a sensible safety precaution.

Tripod: The lightweight pre-assembled tripod has 1” diameter stainless steel legs to provide a rigid and stable observing platform. It easily adjusts in height from 29" to 46" with no tools needed for seated or standing observations through the telescope. Spreader bars lock the legs firmly open when the tripod is set up. The tripod includes a convenient accessory tray that attaches to the spreader bars to hold your eyepieces and accessories close at hand and up out of the dew-soaked grass. 

Two year warranty: As an expression of Celestron’s confidence in the quality of their products, the Cometron 114AZ is protected by Celestron’s two-year limited warranty against flaws in materials and workmanship.
Highest Useful Magnification:
This is the highest visual power a telescope can achieve before the image becomes too dim for useful observing (generally at about 50x to 60x per inch of telescope aperture). However, this power is very often unreachable due to turbulence in our atmosphere that makes the image too blurry and unstable to see any detail.

On nights of less-than-perfect seeing, medium to low power planetary, binary star, and globular cluster observing (at 25x to 30x per inch of aperture or less) is usually more enjoyable than fruitlessly attempting to push a telescope's magnification to its theoretical limits. Very high powers are generally best reserved for planetary observations and binary star splitting.

Small aperture telescopes can usually use more power per inch of aperture on any given night than larger telescopes, as they look through a smaller column of air and see less of the turbulence in our atmosphere. While some observers use up to 100x per inch of refractor aperture on Mars and Jupiter, the actual number of minutes they spend observing at such powers is small in relation to the number of hours they spend waiting for the atmosphere to stabilize enough for them to use such very high powers.
Visual Limiting Magnitude:
This is the magnitude (or brightness) of the faintest star that can be seen with a telescope. The larger the number, the fainter the star that can be seen. An approximate formula for determining the visual limiting magnitude of a telescope is 7.5 + 5 log aperture (in cm).

This is the formula that we use with all of the telescopes we carry, so that our published specs will be consistent from aperture to aperture, from manufacturer to manufacturer. Some telescope makers may use other unspecified methods to determine the limiting magnitude, so their published figures may differ from ours.

Keep in mind that this formula does not take into account light loss within the scope, seeing conditions, the observer’s age (visual performance decreases as we get older), the telescope’s age (the reflectivity of telescope mirrors decreases as they get older), etc. The limiting magnitudes specified by manufacturers for their telescopes assume very dark skies, trained observers, and excellent atmospheric transparency – and are therefore rarely obtainable under average observing conditions. The photographic limiting magnitude is always greater than the visual (typically by two magnitudes).

Focal Length:
This is the length of the effective optical path of a telescopeor eyepiece (the distance from the main mirror or lens where the lightis gathered to the point where the prime focus image is formed). Focallength is typically expressed in millimeters.

The longer the focallength, the higher the magnification and the narrower the field of viewwith any given eyepiece. The shorter the focal length, the lower themagnification and the wider the field of view with the same eyepiece.

Focal Ratio:
This is the ‘speed’ of a telescope’s optics, found by dividing the focal length by the aperture. The smaller the f/number, the lower the magnification, the wider the field, and the brighter the image with any given eyepiece or camera.

Fast f/4 to f/5 focal ratios are generally best for lower power wide field observing and deep space photography. Slow f/11 to f/15 focal ratios are usually better suited to higher power lunar, planetary, and binary star observing and high power photography. Medium f/6 to f/10 focal ratios work well with either.

An f/5 system can photograph a nebula or other faint extended deep space object in one-fourth the time of an f/10 system, but the image will be only one-half as large. Point sources, such as stars, are recorded based on the aperture, however, rather than the focal ratio – so that the larger the aperture, the fainter the star you can see or photograph, no matter what the focal ratio.

This is the ability of a telescope to separate closely-spaced binary stars into two distinct objects, measured in seconds of arc. One arc second equals 1/3600th of a degree and is about the width of a 25-cent coin at a distance of three miles! In essence, resolution is a measure of how much detail a telescope can reveal. The resolution values on our website are derived using the Dawes’ limit formula.

Dawes’ limit only applies to point sources of light (stars). Smaller separations can be resolved in extended objects, such as the planets. For example, Cassini’s Division in the rings of Saturn (0.5 arc seconds across), was discovered using a 2.5” telescope – which has a Dawes’ limit of 1.8 arc seconds!

The ability of a telescope to resolve to Dawes’ limit is usually much more affected by seeing conditions, by the difference in brightness between the binary star components, and by the observer’s visual acuity, than it is by the optical quality of the telescope.

1.02 arc seconds
This is the diameter of the light-gathering main mirror or objective lens of a telescope. In general, the larger the aperture, the better the resolution and the fainter the objects you can see.
The weight of this product.
8.4 lbs
Heaviest Single Component:
The weight of the heaviest component in this package.
4.6 lbs
Telescope Type:
The optical design of a telescope.  Telescope type is classified by three primary optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, or by the task they perform.
View Finder:
Red dot
2 years
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Omni 6mm 1.25" Plossl
by Celestron
Omni 4mm 1.25" Plossl
by Celestron
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Cometron 114AZ, 4.5" altazimuth reflector

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Cometron 114AZ, 4.5" altazimuth reflectorA close-up of the Celestron Cometron 114AZ focuser and red dot finder.
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Our Product #: COM114
Manufacturer Product #: 21079
Price: $179.95  FREE ground shipping - Click for more info
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MSRP: $279.95

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Clear skies,

Designed with a wide field of view for observing comets, the sensibly-priced Celestron Cometron 114AZ parabolic mirror altazimuth reflector also provides even beginning stargazers with sharp and detailed views of the Moon, planets, star clusters, galaxies, and more.

. . . our 34th year