Askar FRA500 Quintuplet APO Astrograph

The Askar FRA500 is a professional-level quintuplet astrograph telescope with a fast f/5.6 focal ratio and 90 mm aperture. Built for astrophotographers, this innovative refractor delivers sharp, flat, and color-correct images across an impressively wide 55 mm image circle—ideal for full-frame cameras.

At its heart lies a unique “3+2” Petzval optical design—three front lenses (including two ED elements for advanced color correction) and two rear field-flattening elements. This design ensures pinpoint stars to the very edge of the field, eliminating the need for external flatteners or calculating confusing back-focus.

The FRA500’s mechanical design is as impressive as its optics. It features a 3.5" heavy-duty focuser with dual-speed control, a sleek dew shield, solid tube rings, Losmandy-style dovetail, and a robust yet compact OTA weighing only 4 kg. Whether you're imaging nebulae from your backyard or traveling to remote dark skies, the Askar FRA500 delivers professional results with minimal fuss.

• Askar FRA500 OTA (500 mm f/5.6 Quintuplet APO)
• Pair of CNC-machined Tube Rings
• Integrated Carry Handle
• Losmandy-Style Dovetail Plate
• Conical Extender
• User Manual