Askar 3" 0.7x Full-Frame gearbox - Specifications and features
Le réducteur Askar 3 pouces 0.7x est spécialement conçu pour les astrographes 107PHQ et 130PHQ. Ce modèle utilise une conception triplet avec un verre ED pour minimiser les aberrations chromatiques et améliorer la qualité optique. Ce réducteur est compatible avec les capteurs full-frame, offrant une couverture d’image complète sans vignettage. Sa réduction de 0.7x permet de raccourcir le rapport focal et de maximiser le champ de vision, idéal pour les astrophotographes cherchant à capturer des objets célestes étendus.
Caractéristiques du réducteur Askar 3” 0.7x
- Reduced focal ratio : 4.9 for the 107PHQ, optimizing brightness and enabling shorter exposure times.
- Reduced focal length : 524 mm for the 107PHQ, ideal for observing large celestial objects and for faster, more precise astrophotography.
- Lens design : Triplet with ED glass for reduced aberrations and enhanced sharpness right to the edge of the field.
- Rear focal length : 55 mm, standard for compatibility with many astrophotography accessories.
- Full-frame compatibility : Ensures vignette-free images, even with large sensors, for uniform, detailed capture.
Additional dimensions and specifications
- Outside diameter : 80 mm, ensuring robust construction for stable configurations.
- Total length : Adjusted for compact mounting and easy handling in astrophotography setups.
- Front thread : M77*1, for easy integration with PHQ series optical equipment.
- Thread adapters : Includes M681, M540.75, and M480.75, for maximum flexibility and extended mounting possibilities. The M480.75 thread also allows installation of 2" filters.
Benefits for users
This reducer is designed to increase the field of view and reduce exposure time, optimizing the efficiency of deep-sky astrophotography sessions. By increasing the field of view and lowering the focal ratio, it offers astrophotographers greater flexibility and convenience in capturing precise, detailed images of large celestial objects. Its compatibility with full-frame sensors maximizes image coverage, eliminating loss of edge-of-field detail.
