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This updated second-generation Celestron 11" f/2.2 Rowe-Ackermann Schmidt Astrograph v.2
builds on the success and performance of its earlier iteration with the
addition of an improved Ultra-Stable Focus System that minimizes both
focus shift and mirror flop to improve image quality.
system is specifically designed for astrophotography and astroimaging
with a large 11" aperture and fast f/2.2 focal ratio. The optical tube
assembly (OTA) is being offered by itself without a mount and comes with
a Celestron CGE-style dovetail plate for use on mounts that accept the
larger Losmandy-size mounting system.
Using 4-element rare-earth
optical glass lenses ensures accurate color rendition and eliminates
aberrations such as coma and field curvatures. The StarBright XLT
multi-coating system, which includes anti-reflection coatings on the
lenses and highly reflective coatings on the mirrors, increases light
transmission throughout the entire optical path. A 12VDC MagLev fan
reduces cooldown time and provides optimal airflow through the optical
tube while filtering harmful dust from the interior.
imaging circle is made to cover today's large DSLR and CCD imaging
sensors to capture full-frame shots without vignetting, while a fast
focal ratio reduces exposure times and background noise without
sacrificing image quality and gives you more time for multiple shots of
the same object with different filters for later post processing and
stacking. Since this OTA is designed as an imaging scope, a 42mm
T-thread camera adapter and 48mm camera adapter are provided. Other
adapters are available separately if required.