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Celestron Schmidt-Cassegrain Telescope EdgeHD-SC 203/2032 OTA

Experience our best optical performance with EdgeHD's flat-field Schmidt-Cassegrain aplanatic optics to identify stars right to the edge of today's largest image sensors and widest eyepieces.

Aluminum optical tube with tube vents featuring an integrated 50 mesh filter allows hot air to escape from behind the main mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging.

The versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories.

Celestron's premium StarBright XLT coatings provide maximum light transmission.

Included is a 9x50 finderscope, a 1.25" mirror diagonal for more comfortable viewing, and a 40mm 1.25" Plössl eyepiece.

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receive it in usually 7 to 9 working days
CE91030-XLT / CE91031-XLT

Celestron EdgeHD optics: corrected image, sharp to the edge!

EdgeHD is Celestron's optical design designation, the "Aplanatic Schmidt-Cassegrain Telescope." After more than 50 years of success, Celestron is revolutionizing the classic Schmidt-Cassegrain telescope.

EdgeHD (English: "Edge High Definition") telescopes are true astrographs. This optical system delivers sharp, distortion-free images right to the edge of the field of view. Not only is coma corrected off the optical axis, as with other so-called "coma-free" optical designs available on the market, but also curvature of the field.

Many optical systems are propagated as "astrographs". They obtain images of stars with the desired precision, but along a curved image plane. When taking pictures with cameras, the result is a conspicuous field curvature that increases towards the edge of the field and becomes more noticeable the larger the sensor. The stars inflate into small rings ("doughnuts") towards the edge. In addition to coma, Celestron Edge HD telescopes also correct for this curvature of field all the way to the edge. This also significantly improves resolution and cut-off size compared to competing optics with a similar aperture.

Celestron's XLT multi-coating also helps EdgeHD optics achieve a significant increase in performance compared to similar systems on the market.

The mechanics and tube of the Edge HD telescopes have been completely revised:

Mirror locks hold the main mirror in any focus position without putting pressure on the optical elements. The image always remains stable on the chip, even with long exposure times.

The ventilation openings behind the main mirror ensure rapid air exchange, so that the optics cool down quickly without equal. Thanks to an air filter system, no dust enters the tube.

This variant of the tube is equipped with a 3" Losmandy rail, suitable for the Celestron CGEM mount, for example.


Sistema óptico

Tipo  Reflector
Tipo de construcción  EdgeHD-Cassegrain 
Apertura (mm)  203
Distancia focal (mm)  2032
Relación de apertura (f/)  10
Capacidad de resolución  0,57
Capacidad colectora de luz  841
Ampliación útil máxima  406
Peso del tubo (kg) 6,35
Construcción de tubo Tubo completo

Tubo telescópico del ocular

Tipo de construcción  Rosca SC
Conexión (lado de ocular)  1,25"


Tipo de montura  sin montura
Tipo de construcción  OTA 

Accesorios incluidos

Oculares de 1,25"  Plössl 40mm
Telescopio visor  9x50
Sistema óptico de desviación  Espejo zenitar, 1,25" - 90o
Placa cola de milano Losmandy-Style

En general

Serie OTA 


Luna y planetas
Observación de la naturaleza no recomendado
Nebulosas y galaxias
Sol  no (solamente con filtro solar apropiado)

Recomendado para

Principantes  no
Observatorios  no
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Product Details
CE91030-XLT / CE91031-XLT
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