CELESTRON RASA 14" ROWE-ACKERMANN ASTROGRAPH

CELESTRON RASA 14" ROWE-ACKERMANN ASTROGRAPH

Description:
The Celestron Rowe-Ackermann 14" (RASA) telescope is a breakthrough instrument designed for wide-field astrophotography and scientific imaging. With a 355 mm aperture and fast f/2.2 focal ratio, it delivers stunning sharpness and minimal exposure times. Covering a broad spectral range from 400 to 900 nm, the RASA 14 enables modern sensors to capture more photons with exceptional precision.

Its optical design features a 4-element ED lens group, eliminating coma, chromatic aberration, and field curvature across the corrected field. A wide usable image circle of 70 mm and excellent off-axis illumination ensure pinpoint stars even at the edges. The back focus of 77.5 mm (or 55 mm with the included adapter) supports a broad range of sensors and camera configurations.

The mechanical structure includes dual Losmandy-style dovetails, ergonomic rear handles, and auxiliary mounting threads. A refined focuser and filtered cooling fan ensure thermal stability and precision focus. The RASA 14 is tailored for professional observatories, SSA projects, and demanding wide-field astrophotography.

Due to its size and precision alignment, delivery is done via pallet shipping with a custom quote depending on destination.

Technical specifications:

• Optical design: Rowe-Ackermann Schmidt

• Aperture: 355.6 mm

• Focal length: 790 mm

• Focal ratio: f/2.2

• Corrector: 4-element ED lens group

• Central obstruction: 158 mm (44%)

• Resolution: 0.39 arcsec

• Image circle: 60.1 mm (2.36"), field of 4.4°

• Usable field: 70 mm (2.75"), 5.1° with minimal fall-off

• Off-axis illumination: 83% at 30 mm

• Optical window: 104 mm

• Spectral range: 400 - 900 nm

• Spot size RMS: < 6.3 μm

• Coatings: StarBright XLT

• Back focus (with adapter): 55 mm

• Back focus (thread base): 77.5 mm

• Mounting: dual Losmandy dovetails

• Cooling: filtered fan system

• Dimensions: Ø 406.4 mm x 1079.5 mm

• Weight: 34.02 kg

• Accessories included: 48 mm camera adapter, battery pack for fan

Additional information:
The Celestron RASA 14" is a next-generation astrograph designed for rapid deep-sky imaging at professional levels. With its corrected field and high transmission across an extended spectral band, it's ideal for large-format sensors and research applications. Optimized for performance and stability, the system requires pallet delivery with reinforced packaging.