The Holy Stone HS900 Sirius is an impressive sub-250g drone at a competitive price. Image quality is good, plenty of features are on offer and flight performance can't be faulted.5.63 x 3.26 x 2.44 in / 143 × 82.8 × 62 mm folded / 6.59 x 8.57 x 2.44 in / 167.4 x 217.8 x 62 mm unfoldedHoly Stone is well known within the beginner drone category, and the latest model marks a new direction and a significant leap in performance and image quality.
On the rear, you'll find the MicroSD card slot alongside the battery compartment and USB-C port for charging, while the small camera and 3-axis gimbal offering mechanical Image Stabilization are located at the front. GPS positioning is provided by connection to GPS, GLONASS, Galileo and BeiDou systems to provide stable hovering. This, in turn, delivers Return to Home functionality, which can be initiated by the pilot or automatically when the battery reaches 20% charge and when the connection between the drone and controller is lost.
This makes it difficult to judge the speed and distance required to create a hyperlapse . The wind also moves the drone if it's gusty, and the Electronic Image Stabilization can't compensate for this, so while time-lapses are smooth, they're also bumpy.