Sony a7s MkIII

Sony A7S III – Full-Frame Mirrorless Camera Hire

The Sony A7S III mirrorless DSLR continues to set the standard for full-frame video and hybrid film work. Designed for creators who demand extraordinary sensitivity, flexibility and image quality — from low-light documentary shoots to cinematic narrative productions — the A7S III packs an impressive feature set into a compact, robust body. At Media Dog Hire, it’s one of our most popular cameras thanks to its reliability, performance and versatility.

Often compared to the Sony FX3, the A7S is incredible similar with the same sensor and mostly the same codecs and recording capability, however it gives a few more options for photography than the FX3, but does not provide any audio input. 

Key Features & Capabilities

• Full-frame 12.1 MP Exmor R BSI CMOS sensor + BIONZ XR processor: High sensitivity and low noise performance make the A7S III ideal for low-light environments, interior shoots, night-time filming, and uncontrolled lighting setups.
• 4K video up to 120 fps, Full HD up to 240 fps — with full-pixel readout (no pixel binning), delivering clean, detailed video and smooth slow-motion for creative or documentary work.
• 10-bit 4:2:2 internal recording, with S-Log2/3 & HLG profiles — giving colourists maximum flexibility for grading and cinematic colour workflows.
• Dual card slots (CFexpress Type A + SD UHS-II) — ideal for high-bitrate video or long continuous recording sessions. Our cameras come with a 160gb and an 80gb CFexpress Type A cards as standard, which can handle all frame rates and codecs this camera provides. 
• Hybrid autofocus system with real-time Eye detection autofocus — fast, accurate, and reliable autofocus even during handheld or run-and-gun shooting. Can lock onto eyes to maintain focus – and even works with animals.
• 5-axis in-body image stabilization (IBIS) : up to 5.5 stops of stabilization — great for handheld work, run-and-gun shoots, or when gimbals aren’t practical.
• Dynamic range & low-light performance: native ISO 80–102,400 (expandable 40–409,600), with ~15 + stops for video — excellent latitude for contrasty scenes or mixed lighting.
• High-resolution EVF and fully articulating touchscreen: 9.44 million-dot OLED viewfinder and fold-out screen for flexible shooting angles and precise monitoring.
• Native Sony E-Mount which can be easily adapted to Canon EF or PL with adapters, giving it a huge range of possible lens configurations.  Sony E-Mount means it will support all the autofocus features you can get with Sony G Master lenses.

Great For .. :

• Low-light filmmaking & documentary: Interior interviews, night exteriors, concert or event coverage without bulky lighting rigs.
• Run-and-gun or handheld shoots: The camera’s IBIS + autofocus + compact form make it ideal for vérité-style filming, BTS shoots or quick-location work.
• Cinematic 4K production: With clean, high-bitrate 10-bit video and S-Log3, it’s ready for grading workflows and delivering broadcast-quality output.
• Hybrid projects (video + stills): While the A7S III is video-oriented, it still delivers solid performance for behind-the-scenes stills or content creation.
• Extend the run time with a dummy battery to run power from V-Mount batteries – making it also great for events, with it’s small footprint and ability to rig in tight spaces whilst giving exceptional image quality. This camera has been very popular as a ‘lock off wide’, as you can clamp to the back of an arena trussing or bars, or leave on a small tripod, to give that big wide angle with fantastic clarity.

The Sony A7S III balances professional-level specs with portability, reliability, and flexibility. Especially when paired with the right lenses — from sharp modern primes to characterful vintage glass — it becomes a versatile workhorse capable of adapting to many shooting styles. Whether you’re doing gritty documentary, sleek commercial, music video, or cinematic storytelling, this camera delivers consistent, high-quality results.

At Media Dog Hire, it’s a core member of our rental fleet. and is regularly chosen by indie filmmakers, content creators, and professional production houses alike for its all-round performance and price-to-capability ratio.

Our cameras come with 1x 160gb and 1x 80gb CFexpress cards as standard, additional cards can be hired on request.

Call us now to Hire the A7S III (A7SIII) in Glasgow, Manchester, Birmingham and throughout the UK with Nationwide next-day delivery.