Sony Alpha 1 (A1)

Manufacturer: Sony Type: Mirrorless camera (full-frame) Year introduced: 2021 (announced January 26, 2021) Sensor: 50.1MP stacked BSI CMOS Price: $6,500 (body only) Mount: Sony E-mount

Overview

The Sony Alpha 1 (α1) was announced on January 26, 2021, as Sony’s new flagship mirrorless camera. (^[1]) It combined specifications previously seen only in separate product lines: 50.1 megapixels from a stacked BSI sensor for speed, 30fps burst shooting, 8K/30p video, and a 1/400 second maximum flash sync speed — a breakthrough for underwater photography.

The 1/400s flash sync speed (vs. the 1/200–1/250s standard on most cameras) was particularly significant for underwater photographers. In bright tropical waters, faster sync speed allows use of smaller apertures or slower ISOs to control ambient light while maintaining strobe fill — a meaningful technical advantage for shallow-water work.

Housing race (2021)

The Nauticam NA-a1 shipped in April 2021 at $3,534. (^[2])

Key specifications

• Sensor: 50.1MP stacked BSI full-frame CMOS
• Burst rate: 30fps with full AF/AE tracking (electronic shutter)
• Video: 8K/30p, 4K/120p
• Flash sync: 1/400s (breakthrough for UW — most cameras limited to 1/200–1/250s)
• Autofocus: Real-time tracking with eye, face, and animal detection
• Price: $6,500

Significance

The A1 was positioned at $6,500 — significantly above comparable Sony bodies — reflecting its combined resolution and speed capabilities. The 1/400s sync speed was cited repeatedly in the underwater photography community as a genuine differentiator for ambient-light control in tropical conditions. Paired with Marelux and Nauticam housings, it became a leading choice for photographers seeking maximum resolution with fast-action capability.

Ambassadors for Marelux, including Renee Capozzola, shot with the A1 in its housing ecosystem.

Reviews & Discussion

• ^[3] — announcement coverage. Article (editorial source).
• ^[4] — housing availability. Article (editorial source).

References

• ^[5]
• ^[6]