Περιγραφή
The ASKAR FRA400 refractor represents the pinnacle of optical technology in the quintuplet apochromatic instrument series. With an aperture of 72mm and a focal length of 400mm, it is designed to meet the needs of the most demanding astrophotographers, offering superior performance without compromise.
Precision optics: perfectly flat field
Thanks to its air-spaced quintuple optical design, the FRA400 offers a flat field with a diagonal of up to 44mm , eliminating the need for additional flatteners or reducers. This makes it ideal for use with large format sensors, ensuring sharp, distortion-free images across the entire frame.
High-level color correction
The FRA400 stands out for its impeccable color correction, the result of careful design and the use of high-quality ED glass elements, including the renowned FPL53 SuperAPO produced by Ohara (Made in Japan). The result is a clear image, with well-defined contrasts and free of aberrations even at high magnifications.
Advanced and reliable mechanics
The mechanical structure of the FRA400 has been further improved to offer stability and precision in every application. The 3″ Rack & Pinion focuser with integrated 360° rotator ensures smooth and precise focusing, even with heavy loads. Thanks to the 1:10 gear ratio, it is possible to obtain perfect adjustments, essential for high-resolution astrophotography.
Optical and mechanical inspection before delivery
Each instrument is carefully checked on the optical bench to ensure perfect collimation and optimal mechanical operation. Our after-sales service is always available to customize setups and accessories, ensuring a tailor-made configuration for each amateur astronomer.
Main technical specifications:
- Aperture: 72mm
- Focal length: 400mm
- Optical design: Quintuplet apochromatic with FPL53
- Flat field: Up to 44mm diagonal
- Focuser: 3″ Rack & Pinion with 1:10 gear ratio
- Integrated rotator: 360° for optimal management of the photographic camera
Why choose ASKAR FRA400?
The FRA400 72mm is not only a top-quality refractor, but also an instrument with an unbeatable quality-price ratio. It is the perfect choice for amateur astronomers and astrophotographers looking for exceptional performance in a compact and versatile format.
Trust the quality of ASKAR and the professional assistance of ARTESKY for your astrophotography experience.
