Sony HVL-F28RMA Compact Flash with Enhanced Radio Control. The Sony HVL-F28RMA is a compact, powerful external flash for Sony E-mount cameras (full-frame and APS-C), ideal for portrait, event, street, and travel photography. It offers optimized performance, wireless radio control, and improved compatibility for professional and aspiring photographers. Technical Highlights: Guide Number: GN28 (at ISO 100, 50mm), delivering powerful light output for its compact size. Flash Control: P-TTL/ADI metering, manual setting (1/1 to 1/256 in 1/3-stop increments), high-speed sync (HSS), multi-flash mode, slow sync, and rear sync. Radio Control: Integrated 2.4GHz radio transceiver, functions as a transmitter or receiver. Controls up to 15 flashes in 5 groups over a range of 35m. Compatible with the Sony FA-WRC1M Commander and FA-WRR1 Receiver, with improved integration into newer Alpha models. Flash head: Tiltable from 0 to 120° (0, 20, 40, 60, 80, 120° clicks) for bounce lighting, no swivel function. Includes wide-angle panel for 24mm coverage. Power supply: Two AA batteries (alkaline or NiMH), up to 110 flashes per set (1/1, alkaline) or 130 (NiMH). Recycle time of 0.1–6.4 s (alkaline) or 0.1–4.1 s (NiMH). Design: Dustproof and splashproof body (65.1 x 83.5 x 91.4 mm, 219 g without batteries) with metal multi-interface shoe and reinforced side frame. Intuitive controls with +/- brightness buttons, test button, pairing button, and locking lever. Key features: Image quality: Works with the face detection of compatible cameras (e.g., A7C II, A7R V, A9 III) to balance flash and ambient light for natural skin tones and precise white balance. Optimized light distribution with no vignetting. Users appreciate: "Small but powerful, ideal for spontaneous shoots!" Handling: Ultra-compact and lightweight, it fits in your pocket and is perfect for mirrorless cameras like the A7 series. Flash parameters such as compensation and lighting conditions are directly controllable via the camera menu for an efficient workflow. Versatility: Suitable for on-camera and off-camera flash, with reliable radio control even with obstacles or in bright light. The robust construction supports outdoor use; however, the lack of a swivel function for vertical bounce shots is a drawback. This flash unit is ideal for photographers looking for a compact, powerful flash unit with advanced radio control and seamless integration into Sony Alpha systems.