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Radio2Space AP 55/200 55FL F3.6 PLUS ESATTO OTA Specs
| Brand | Radio2Space (PrimaLuceLab Brand) |
| Full Model Code | Radio2Space 55FL f/3.6 PLUS High-Speed Astrograph with ESATTO 2-inch Robotic Micro-Focuser |
| Country of Origin | Italy |
| Optical Design | Apochromatic Refractor (Fluorite Lens Configuration utilizing integrated multi-element field correction) |
| Aperture | 55 mm (2.17 inches) |
| Focal Length | 200 mm |
| Focal Ratio | f/3.6 |
| Optical Coatings | Ultra-Wideband Fully Multi-Coated Lens Matrix Anti-Reflection System |
| Glass Material | Premium Fluorite Crystal Optic Elements delivering minimal chromatic dispersion levels |
| Secondary Mirror Obstruction | 0 mm (Refractor Design with Clear Optical Path Layout) |
| Secondary Mirror Obstruction by Diameter | 0.00% |
| Secondary Mirror Obstruction by Area | 0.00% |
| Resolving Power | 2.11 Arcseconds (Dawes), 2.51 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 11.3 |
| Highest Useful Magnification | 110x |
| Lowest Useful Magnification | 8x |
| Optical Tube Material | CNC-Machined Carbon Fiber Tube Body Shell with Red Anodized Aluminum PLUS Ring System |
| Focuser Style & Mechanism | ESATTO 2-inch Robotic Micro-Focuser featuring integrated electronic stepper motor control tracking |
| Mirror Lock Mechanism | Not Applicable |
| Optical Tube Dimensions | 75 mm x 210 mm |
| Optical Tube Weight | 1.50 kg (3.31 lbs) |
| Mount Attachment Type | PLUS System Anodized Support Plates matching Vixen or Losmandy clamp channels |
| Finder Scope Specification | Integrated PLUS Threaded Points for Guide Scope Ring Bases |
| Included Accessories | 55FL Astrograph OTA, ESATTO 2-inch Electronic Focuser, PLUS Guide and Support Rings, M48 Camera Adapter, USB Control Cables |
| Standard Warranty | 2-Year Manufacturer Warranty |
| Application | Ultra-high-speed robotic astrophotography sequences and wide-field deep-sky imaging loops, pairing a fast f/3.6 configuration with micrometric automated focus adjustments. |
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