Sony's first full-frame mirrorless camera, the body that launched the E-mount revolution.
The Sony Alpha A7 (ILCE-7) was announced in October 2013 as the world's first full-frame mirrorless interchangeable-lens camera, establishing the FE mount system that has since become one of the dominant professional mirrorless platforms. The original A7 demonstrated that a full-frame sensor could be packaged in a body significantly smaller and lighter than contemporary full-frame DSLRs. Fast Hybrid AF combined phase-detect and contrast-detect for faster acquisition than the contrast-only approach of earlier Sony mirrorless cameras.
The 24.3MP full-frame Exmor CMOS sensor pairs with the BIONZ X processor. Fast Hybrid AF provides 117 phase-detection points for quick subject acquisition, supplemented by 25 contrast-detection points. Burst shooting runs at 5fps. 1080p video records at up to 60i; there is no 4K recording. The 5-axis IBIS built into the companion A7R was not included in the original A7. Battery life approximately 270 shots via EVF and 340 shots via LCD using the NP-FW50, body weight approximately 474g with battery and card, single SD/SDHC/SDXC slot.
The A7 original's historical significance was demonstrating full-frame mirrorless as a practical system — image quality equal to contemporary full-frame DSLRs in a substantially lighter body. The NP-FW50 battery at 270 shots per charge was the most-criticized practical limitation, requiring a spare battery as standard operating practice. No IBIS, no 4K, and the single card slot are the modern specification limitations versus later A7-series generations.
On the used market the original A7 is very affordable as the entry to FE system history. Condition checks: Fast Hybrid AF response, NP-FW50 battery health — with only 270 shots per charge, battery condition directly determines practical usability — and single SD slot contacts. The A7 III and A7C provide current-generation sensor and IBIS for the FE system at higher prices. The NP-FW50 is widely available from the large APS-C E-mount user base. Compatible with all Sony FE-mount full-frame and APS-C E-mount lenses.