Askar FRA500 90mm f/5.6 Quintuplet APO Refractor OTA Pre-Owned Like New
Overview
Experience premium wide-field astrophotography with the Askar FRA500 90mm f/5.6 Quintuplet APO Refractor. This pre-owned telescope is in like-new condition.. Featuring a sophisticated five-element Petzval optical design, the FRA500 delivers a naturally flat field without requiring an external field flattener, making it an excellent choice for both dedicated astro-imagers and visual observers.
Whether you're capturing expansive nebulae, galaxies, or star fields, the FRA500 provides exceptional color correction, sharp stars across the frame, and outstanding optical performance.
Condition
- Condition: Pre-Owned – Like New
- Optics are clean and free from scratches, haze, fungus, or coating defects.
- Exterior shows little to no cosmetic wear.
- Focuser operates smoothly and precisely.
- Fully tested and ready for use.
Key Features
- 90mm apochromatic quintuplet refractor
- 500mm focal length
- Fast f/5.6 focal ratio
- Built-in flat-field Petzval optical design
- Large image circle suitable for full-frame cameras
- Precision dual-speed rack-and-pinion focuser
- Excellent color correction with pinpoint stars across the field
- Ideal for astrophotography and wide-field visual observing
Specifications
- Aperture: 90mm
- Focal Length: 500mm
- Focal Ratio: f/5.6
- Optical Design: Quintuplet APO Petzval
- Image Circle: Up to 55mm
- Tube Material: CNC-machined aluminum
- Dual-speed precision focuser
- Compatible with DSLR, mirrorless, CMOS, and CCD imaging systems
Included
- Askar FRA500 90mm f/5.6 Optical Tube Assembly (OTA)
- CNC Tube Rings
- Carry Handle
- Losmandy-Style Dovetail Plate
- Original Aluminum Hard Carrying Case
- Original Accessories (as shown)
