Take coma out of the picture!

Do you use a reflector? Level up your imaging with an HR Coma Corrector!

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June 5, 2026 2:46pm EDT

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Do you use a reflector? Level up your imaging with an HR Coma Corrector!

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HR Coma Corrector on top of image of Thor's Helmet nebula taken by Christopher Sullivan

Maximize your reflector's imaging potential by taking coma out of the picture!

After hours at the eyepiece, you finally get to view the fruits of your astrophotography labors. The stars in the center of the field pop like brilliant precise points of light. But as you survey the image, you notice the stars at the edge have taken on an unnatural comet-like shape. Your long night has been marred by coma. Coma is a common plague of the Newtonian reflector design, and its annoying presence at the outskirts of an image can be a bane for astronomers of all levels.

Explore Scientific’s HR Variable Coma Corrector is a high-performance optical corrector designed to help you minimize or even eliminate image aberrations caused by this off-axis optical phenomenon even in fast Newtonians. This 2-inch coma corrector is EMC Coated to reduce internal reflections and has a spacer with markings.

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Astrophotographer Christopher Sullivan captured this image of WR 134 with the aid of an Explore Scientific HR Coma Corrector and 208mm f/3.9 Newtonian. WR 134 is a Wolf-Rayet star located in the Cygnus constellation.

Looking to build a reflector rig? This f/4.4 Newtonian package is a great place to start!

114mm f/4.4 Newtonian with Equatorial Mount

Compact, capable, and packed with features, this classic 114mm Newtonian Reflector Telescope is the perfect blend of performance and portability. Its 114mm primary mirror collects ample light for observing the Moon, planets, and bright deep-sky objects like nebulae and galaxies. With a fast focal ratio of f/4.4 and a 500mm focal length, it is also well-suited for deep-sky imaging, providing a wide field of view and shorter exposure times.

Mounted on a smooth equatorial mount, this telescope features slow-motion controls on both the right ascension and declination axes, allowing precise tracking of celestial objects as they move across the sky. Additional accessories include two eyepieces (25mm and 10mm) for magnifications of 20x and 50x, a red-dot finder scope, and a counterweight to maintain balance when accessories are added.