Sony FX3 Accessories: What an FX3 or FX30 Rig Really Needs

The Sony FX3 accessories worth buying first are memory cards fast enough for your recording format, spare batteries, a variable ND filter and a plan for audio, because the FX3 has no built-in ND filter, a gap Videomaker called the biggest feature that might deter buyers. A cage, gimbal and tripod come after that, and the FX3's built-in mounting points and five-axis stabilization mean you may need less of each than you expect.

A note on scope: most of the published testing below covers the FX3. The FX30 is Sony's Super 35 sibling in the same Cinema Line and receives many of the same firmware features. This guide does not have FX30-specific data on cards, batteries or weight, so check those points against Sony's FX30 documentation before you order.

What the FX3 leaves out, and why that shapes your list

The FX3 was built to be small. Sony removed the viewfinder and top dials, and PetaPixel reported the body was too small for built-in neutral density filters or SDI connectors. Here is the short version of what that means for your rig.

Feature	What the FX3 has	What it means for accessories
Weight	640 g body only, 715 g with card and battery	Your starting number for gimbal and tripod payload
Card slots	Dual slots for CFexpress Type A or SD	SD cards cover most work
Built-in ND	None	Buy a screw-on ND filter
Viewfinder	None, rear 1.44 million-dot tilt-swivel touch LCD	Consider a monitor or EVF for outdoor work
Mounting points	Five 1/4-20 holes on the body, three on the supplied handle	A cage is optional
Audio	Built-in stereo mic, XLR inputs on the handle	Add external mics for anything that matters
Video output	Full-size HDMI Type-A port	Protect the cable if you run a monitor
Power	Same battery as the A7S III, plus USB-C external power	Spares, a charger and a USB-C power source
Stabilization	Five-axis IBIS	A gimbal can wait

If you are still deciding on the camera itself, read Is the Sony FX3 Worth It for Video in 2025? first.

Memory cards: SD for most work, CFexpress for the top data rate

What the slots take

The FX3 has two slots, and each takes either an SD card or a CFexpress Type A card, the same arrangement as the A7S III. Sony said the card writing requirements for the FX3 are essentially the same as for the A7S III.

Which card you actually need

Videomaker found only one setting that requires CFexpress: S&Q recording in 10-bit 4:2:2 Intra at 60p, where data rates go up to 1200 Mbps. Outside that mode, its reviewers said the more affordable SD cards work fine. The top normal 4K bitrate is 600 Mbps in All-I XAVC S-I, which works out to 75 megabytes per second.

Not every reviewer agrees. The 42West review said Sony's Tough CFexpress Type A cards are needed and warned buyers to budget for cards and storage on top of the camera.

A practical approach: start with a fast UHS-II SD card for everyday 4K, and add a CFexpress Type A card only when you start shooting high-bitrate slow motion. When you compare SD cards, look at the guaranteed minimum write speed, not the read speed printed largest on the package.

Plan for storage, too

Your codec choice changes how fast cards fill. In the 42West review, XAVC HS 4K files were smaller but harder for a computer to edit, while XAVC S-I 4K files were larger and easier to edit. If you choose S-I for smoother editing, buy more card capacity and a backup drive. Our guides on SD vs CFexpress and external drives and backup cover the details.

Batteries and power

Spare batteries and a charger

PetaPixel reported the FX3 uses the same battery as the A7S III, and that battery life should be better because the FX3 does not run a power-hungry EVF. Videomaker also noted longer battery life than the a7S III.

Better is not unlimited. For a full shoot day, carry at least two spares, and confirm the battery part number in your camera's manual before you order.

An external charger lets you charge one battery while you shoot with another. PetaPixel noted that the current FX3A version came with a charger swap, so check what came in your box before buying a second charger.

USB-C power for long takes

The FX3's USB-C port can power the camera continuously. With external power, the FX3 supports 4K 60p recording that Sony found ran about 13 hours before hitting a limit. For interviews, events or livestreams, a USB-C power bank or wall adapter can replace battery swaps entirely. For more on spares, see Best Spare Batteries for Canon, Sony and Nikon.

ND filter: the accessory the FX3 asks for

An ND filter is the accessory reviewers pointed to most directly. Videomaker called the lack of built-in ND filters the biggest feature that might deter buyers. Newsshooter said it will not be a deal-breaker for hybrid shooters who already use variable or fixed-strength ND filters.

Why video needs ND in daylight

For 24 fps video, Newsshooter explains the conventional shutter speed is 1/48 second, and on the FX3 you set 1/50. The FX3 has no shutter-angle setting, so when you change frame rate you change the shutter speed by hand. For movies, the lowest standard ISO is 80.

With shutter speed and ISO pinned, the only way left to control exposure in bright sun is the aperture. Stopping down to a small aperture costs you the shallow depth of field most people bought this camera for. An ND filter cuts the light so you can keep the wide aperture and the normal shutter speed outdoors.

Variable or fixed

Newsshooter's reviewer said he dislikes lens filters for video because they slow him down. A variable ND keeps that cost to a twist of a ring, which suits run-and-gun work. Fixed filters take more swapping but suit a planned shoot with steady light.

Buy the filter for your largest lens thread and use step-up rings for smaller lenses. Stacking a cheap filter in front of good glass is a bad trade, so do not buy the cheapest option you can find.

For more background, read ND Filters Explained and When (and When Not) to Use Filters.

Audio: the handle, wireless mics and timecode

The XLR handle

At launch, the FX3 shipped with a top handle that carries two XLR/TRS combination inputs, a digital audio interface for four-channel 24-bit recording and a second headphone jack. Four-channel 24-bit audio is available with the supplied handle or with shoe accessories that support it. The handle has no microphone of its own.

In 2025, PetaPixel reported the current model is technically the FX3A and that the XLR Handle Unit is now an optional $600 add-on. Check what came with your camera before you plan your audio.

The FX3 body has a built-in stereo microphone. Treat it as a reference track for syncing, not as your main audio.

Wireless lav kits and where the receiver goes

Videomaker pointed out a catch for wireless mics: with the handle installed, the camera has no other shoe for a receiver. Its suggestion was to add a cold shoe to one of the three mounting spots on the grip, with many options under $10. A cage also solves this by giving you more mounting points.

A kit with two transmitters covers a two-person interview, and a charging case keeps everything in one place in your bag.

If the camera fan is audible in a quiet room, it can be set to Auto, Minimum or Off. For more mic options, see Best Budget Microphones for Beginner Filmmakers.

Timecode for multicam

Timecode matters once you shoot with more than one camera or a separate recorder. Firmware 2.00 added timecode sync to the FX3, and Netflix's FX3 production guide notes the optional Sony VMC-BNCM1 is needed to jam external timecode. PetaPixel also notes the FX3 needs an extra adapter cable for external timecode sync. Solo creators can skip this until they need it.

Cage: optional on the FX3, still useful

Sony designed the FX3 so it would not need a third-party cage. It has five 1/4-20 threaded holes on the body and three more on the supplied handle, and Sony says the body threads are backed by a stainless steel substructure. CineD's reviewer wrote that, depending on your shooting style, a cage might not be necessary.

Newsshooter saw it differently in practice. Its reviewer expected many owners to cage the camera anyway because the mounting options are thin, and found that using the left-side point blocks your hand from the grip. He also found that some larger Sony lenses extend below the bottom of the body, which can cause trouble on sleds or teleprompters.

A cage earns its place once you add a monitor, a wireless receiver and an HDMI cable at the same time. The FX3 has a full-size HDMI Type-A port, and a cage with an HDMI cable clamp keeps a tugged cable from straining that connector. FX30 owners should confirm a cage lists their exact model.

Monitor or EVF

Several reviewers missed a viewfinder. Newsshooter found the LCD too small for full-time use outdoors, suggested budgeting for a monitor or EVF, and named the PortKeys LEYE as an inexpensive EVF option. If you later want RAW, the FX3 can output a 16-bit RAW signal over HDMI to a compatible ATOMOS NINJA V/V+ recorder. Hold off on this purchase until you know you shoot outdoors often enough to need it.

Gimbal: try the built-in stabilization first

The FX3 has five-axis IBIS. Videomaker said it works together with lens optical stabilization, adds digital stabilization in Active mode, and that Sony Catalyst can use metadata to stabilize footage further in post. CineD called the system a blessing, especially in Active mode, with a slight image crop as the trade-off.

Start with IBIS for walking shots and handheld b-roll. Add a gimbal when you need running shots, long tracking moves or a floating look that handheld cannot match. Newsshooter noted the FX3's small, powerful body is the kind of camera people want for gimbals and crash cams.

Before buying, add up your real weight. The FX3 is 715 g with card and battery, and then you add the lens, ND filter, mic receiver and any cage. That total must sit inside the gimbal's payload rating with room to spare.

For help deciding, read Sony FX30 Stabilization: Do You Need a Gimbal? and Gimbals for Mirrorless Video Cameras: Match Payload to Your Rig.

Tripod: a fluid head for video

The FX3 has a 1/4-20 thread on the bottom for mounting to a tripod or adding a quick-release plate. For video, the head matters more than the legs. A fluid head gives smooth pans and tilts, which a photo ball head cannot. Choose legs tall enough to reach eye level for standing interviews, and rated for your full rig weight, not just the body.

Our guide on choosing your first tripod walks through height, load and head type.

A sensible buying order

Priority	Accessory	Why
1	Fast SD card	SD covers everything except S&Q 10-bit Intra 60p
2	Spare batteries and charger	Same battery as the A7S III
3	Variable ND filter	No built-in ND
4	Wireless or XLR mic	The handle has no mic of its own
5	Tripod with fluid head	Steady interviews and smooth pans
6	Cage	Optional thanks to built-in mounting points
7	Gimbal	IBIS and Active mode may cover you first
8	CFexpress Type A card	Only for the 1200 Mbps S&Q mode

Buy in that order and use each piece on real shoots before adding the next. If you are tempted to skip ahead, Accessories Beginners Buy Too Early covers the common mistakes, and Sony FX30 First-Time Setup for Video helps you get the camera itself configured.