LX200R ADVANCED RITCHEY-CHRETIEN 10” OTA UHTC

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Sold to Dave.

LX200R ADVANCED RITCHEY-CHRETIEN 10” OTA UHTC

This is my third 10” SCT; I have owned a LX50, LX200GPS and now the LX200R. They just keep getting better, the R scope has the best optics of the bunch. It will cover a 35mm size CCD with pinpoint stars out to the edges, the GPS model could not even come close to this performance. I liked it so much I have now purchased a 12”R.

This is the ADVANCED RITCHEY-CHRETIEN version no longer manufactured. Same design as the ACF but this one has the cool RC badge and was made in the USA.

OTA is used but in excellent condition.
Bob’s knobs installed.
Comes with a Meade “Funny Time” rail but I will also include a real Losmandy DM10 and mounting hardware.
Shipping will be $50 FedEx insured.

Iris was captured with a SBIG STL-11000


A traditional Ritchey-Chrétien (RC) is a type of reflector that delivers a coma-free, flat field of view via hyperbolic primary and secondary mirrors. RC telescopes (from a variety of manufacturers) are found in most of the world's top observatories and NASA's Hubble Space Telescope. Because the mirrors in these telescopes have always been very expensive to make, few amateur astronomers could enjoy them. Fortunately, Meade engineers developed a radical new Advanced Coma Free design by combining a hyperbolic secondary mirror with a corrector-lens-and-spherical-primary-mirror combination that performs as one hyperbolic element. This ACF design produces a coma-free, flat field of view that rivals traditional RC telescopes at a fraction of the cost. The design even eliminates diffraction spikes and improves astigmatism,
both of which are inherent in the traditional RC design. When reviewing Meade's LX400-ACF Advanced Coma Free, Sky and Telescope magazine said, " [It] does indeed perform like a [Ritchey-Chrétien]. The difference between the off-axis images (compared to a Schmidt-Cassegrain) was dramatic to say the least."

f/10 Advanced Coma-Free Optics: Building from a classic RC design, Meade has created a new design with the same coma-free pinpoint star images and flatter field that discerning astrophotographers and most professional observatories have come to expect from classic Ritchey-Chrétien optics. Meade's Advanced Coma-Free system also reduces the astigmatism and eliminates diffractions spikes found in classical RCs. The LX200-ACF is the perfect platform for the demanding researcher and imaging enthusiast with telescopes available in apertures of 8 inches, 10 inches, 12 inches, and 16 inches.
Meade Ultra-High Transmission Coatings (UHTCT) increases total light transmission and image brightness by nearly 20% over Meade's standard coatings. Objects such as stars, galaxies and nebulae will appear significantly brighter

Primary Mirror Lock locks the mirror in place during long-exposure astrophotography.
Oversize Primary Mirror diameters are greater than their listed aperture (e.g., the diameter of the 8" LX200-ACF is actually 8.25"). This additional 1/4" yields a wide, fully illuminated field-of-view


WHAT IS COMA? It’s not some sort of astronomical state of unconsciousness. It’s an optical aberration. Precisely defined, coma is a distortion in which the image of a star cannot be focused to a point, but takes on the shape of a comet. Worst yet, the majority of telescope optical systems, including the popular Schmidt-Cassegrain, have it to one degree or another.

Once, you would have had to spend tens of thousands of dollars for an aplanatic optical system (a fancy term for coma-free). Now that Meade has made this Advanced Coma-Free optical system, this level of performance is affordable to the amateur.