Officina Stellare RiFast 700/2660 SGA OTA

Description

Ultra-low expansion synthetic quartz glass anchors the Officina Stellare RiFast 700/2660 SGA OTA fast astrograph telescope optical tube assembly. Crafted in Italy for elite automated research arrays, this f/3.8 Riccardi-Fast astrograph features a massive 700mm (27.56 inches) aperture and 2660mm focal length. The RiFast 700 SGA OTA yields 0.16 arcsecond Dawes resolving power and reaches magnitude 16.9.

Engineered to eliminate thermal distortion across large-format sensors, the Officina Stellare RiFast 700/2660 SGA OTA combines zero-expansion synthetic quartz primary optics with multi-element low-dispersion flattener lenses. An open-frame carbon fiber truss paired with machined clear anodized aerospace aluminum rings (SGA) supports the 166.00 kg structure. Treated with 96% reflective multi-layer aluminum coatings, this RiFast 700 SGA astrograph maintains precise focal geometry across volatile outdoor temperatures.

Key Features of Officina Stellare RiFast 700/2660 SGA OTA

Built for continuous automated sky surveys in fluctuating mountain climates, this RiFast 700 SGA astrograph optical tube assembly pairs quartz optics with anodized aluminum hardware. It provides fast f/3.8 throughput, motorized secondary focusing, and active thermal extraction for pristine wide-field imaging results.

• 700mm (27.56 inches) clear aperture with 2660mm focal length at fast f/3.8 speed
• Synthetic quartz primary mirror paired with low-dispersion flattener optics
• High-reflectivity 96% multi-layer aluminum matrix optical coatings
• High-modulus carbon fiber truss with clear anodized aerospace aluminum rings (SGA)
• Electronic secondary mirror focus drive array with internal temperature compensation
• Fixed multi-point primary mirror cell with rear axial lock brackets
• Custom heavy-duty multi-point observatory baseplate mounting rail array
• Built-in multi-fan secondary boundary layer thermal extraction system

Zero-Expansion Quartz Optics & Sub-Aperture Correction

The optical train integrates an aspherical quartz primary mirror with an internal sub-aperture lens cluster. With a 310mm secondary mirror obstruction (44.29% by diameter and 19.61% by area), the RiFast 700 OTA produces flat, aberration-free star fields across magnifications from 100x to 1400x.

Robotic Focus Compensation & Thermal Equilibrium

Operating across changing ambient conditions requires active focal control. The RiFast 700 SGA OTA utilizes an electronic secondary mirror focus adjustment drive that responds to internal thermal sensors. Concurrently, the integrated multi-fan secondary boundary layer thermal extraction system clears thermal pockets inside the 980mm by 2080mm framework to stabilize optical wavefronts.

• Electronic focus controller interface hub for remote automated secondary control
• Multi-fan boundary layer thermal extraction array for rapid temperature stabilization
• Pre-drilled chassis mounting provisions for auxiliary guide scope hardware

Officina Stellare RiFast 700 SGA Warranty

Every Officina Stellare RiFast 700/2660 SGA OTA is produced in Italy and backed by a 2-year limited warranty against manufacturing defects. The package includes the 700mm synthetic quartz optical tube assembly, clear anodized framework, electronic focus controller interface hub, multi-fan boundary layer extraction system, and protective fabric truss shroud blanket.