Welcome to use brand new ASKAR FRA series! The FRA, which stands for “FLATFIELD REFRACTIVE ASTRAGRAPH”, is a refractive astrograph designed for built-in flat field correction. FRA also used in visual observation, this series creates versatile high-quality flat frame images for astrophotography, is the few great telescope of versatile optical tube.
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It’s excellent in controlling and possibly avoiding chromatic aberrations, the image quality is also optimized to satisfy the customers of requirement.
It’s worth mentioning that FRA 400/5.6 has a pair of multifunctional attachment tube rings owns the patent, it’s not all style and no substance though, the FRA shows well-conceived design and has a practical three-sided mounting platform, which is convenient for attaching various accessories for photography.