Since their inception,Askar FRA series short focal ratio astrograph have been very well received by astronomical amateurs.This year, we launched the FRA300 Pro —— the smallest 60mm F/5 Petzval astrograph with the fastest native focal ratio in the FRA series so far,its focal length is 300mm. The star is sharp and delicate.At the center of its field of view, the RMS radius can reach 2um. Even a serious user can also be satisfied when it comes to the shape of stars.It performs excellence with full-frame and supports 44mm imaging,which is a rare astrograph for amateur astronomers.Compared with F/6 or F/7，F/5 can effectively reduce the exposure time,helps you get the same exposure in less time.In addition, the entire OTA is compact, making it the portable choice for field photographers.