Best Sony a7 III Settings for Beginners: What to Change First

The best Sony a7 III settings for a beginner come down to five changes: shoot in Aperture Priority, use continuous autofocus with Eye AF, save RAW files, pick the right burst mode and put your favorite settings on the Fn button. Make those changes first and the camera does more of the hard work, so you can think about your picture.

The a7 III launched in February 2018 and has since been replaced by the A7 IV, but reviewers still call it a capable all-rounder for photos and video. That means everything below still applies if you bought one new or used.

The three settings behind every photo

Before you touch a menu, it helps to know what the camera is juggling. Every photo is made from three settings working together, a bit like three people sharing one blanket. If one pulls harder, the others have to give a little.

Aperture: the pupil of your eye

The aperture is the hole inside your lens. Think of the pupil in your eye: it opens wide in a dark room and shrinks in bright sun. A wide aperture, like f/1.8 or f/2.8, lets in lots of light and makes the background soft and blurry. A small aperture, like f/8 or f/11, keeps more of the scene sharp from front to back.

Shutter speed: a door opening and closing

Shutter speed is how long a tiny door stays open to let light in. A fast door, like 1/1000 of a second, freezes a running dog. A slow door, like 1/15 of a second, lets in more light but turns anything moving into a smear.

ISO: turning up the volume

ISO is like the volume knob on a radio. Turning it up makes a dark scene brighter, but past a point you start hearing hiss. In photos, that hiss looks like grainy speckles called noise. The a7 III's normal ISO range runs from 100 to 51,200, expandable to 50 to 204,800 for stills.

Once these three make sense, every setting below is simply a way to help them work better.

Setting 1: Switch to Aperture Priority

Turn the mode dial to A, for Aperture Priority. In this mode you choose the aperture and the camera picks the shutter speed to match. It is the friendliest step out of full auto, because you control the look of the picture without juggling everything at once.

A good starting habit: use the widest aperture your lens allows for portraits, and something around f/8 for landscapes. Then glance at the shutter speed the camera chose. If it drops very low and your subject is moving, raise the ISO a little. That is the whole dance.

When Aperture Priority feels easy, Manual mode is the next step. The manual mode guide for beginners walks through it on the newer A7 IV, and the ideas carry over.

Setting 2: Set up autofocus

Autofocus is where the a7 III shines. It has 693 phase-detection points covering 93% of the frame, plus 425 contrast-detection points. Digital Camera World notes it shares autofocus technology with Sony's flagship sports camera of its time.

Use continuous AF with Eye AF

AF-C means the camera keeps adjusting focus as long as you hold the button, which suits anything that moves. Eye AF finds a person's eye and locks onto it. On the a7 III, Eye AF works in continuous as well as single-shot AF. A firmware update in early 2019 added Real Time Animal Eye AF.

For a beginner shooting family, friends or pets, AF-C with Eye AF is a safe default. People rarely stay perfectly still, so letting the camera follow them saves a lot of soft photos.

Pick a focus area

The focus area tells the camera where to look. The a7 III offers several choices:

Focus area	What it does	Good starting use
Wide	The camera picks the subject anywhere in the frame	Casual shots, learning the camera
Zone	The camera picks within a section you choose	Moving subjects in a known part of the frame
Center	Focuses in the middle of the frame	Simple, predictable shots
Flexible Spot	A small point you place, with an adjustable size	Still subjects where you want exact control
Expand Flexible Spot	Your point, with help if the subject drifts just outside it	Portraits and slower action

If the camera keeps focusing on the wrong thing, like a tree branch instead of a face, switch from Wide to Zone or Expand Flexible Spot. That one change fixes many "why is it blurry" moments. The a7 III's tracking system is called Lock-on AF, which Imaging Resource notes is less capable than the Real-time Tracking found on the newer A7 IV.

Try back-button focus

Back-button focus splits two jobs: your thumb focuses and your finger takes the picture. The a7 III has a dedicated AF-On button for this, plus a joystick for moving the focus point. Try it for a week. Some photographers love it, and some go back to the shutter button, and both are fine.

Keep the AF assist lamp on for dark rooms

Sony rates the a7 III's low-light autofocus at -3.0 EV with an f/2.0 lens. In Imaging Resource's lab, the camera focused on a low-contrast target down to -2.8 EV with an f/2.8 lens, and on a high-contrast target down to about -4.8 EV. With the AF assist lamp turned on, it could focus in complete darkness if the subject was in range and had enough contrast.

Setting 3: Choose your file type and card setup

A RAW file is like raw cookie dough: you can still shape it. A JPEG is the baked cookie, ready to share but harder to change. If you plan to edit at all, shoot RAW, or RAW plus JPEG while you learn.

The a7 III has two card slots, and one of them supports faster UHS-II SD cards. You can record JPEG to one card and RAW to the other, send photos and video to separate cards, or use relay recording so the second card takes over when the first fills up.

If you shoot bursts, pick compressed RAW. Sony's figures put the burst limit at about 89 compressed RAW frames versus 40 uncompressed RAW frames. There is no lossless compressed RAW option on this camera.

The buffer is the camera's waiting room before photos reach the card. Imaging Resource found buffer clearing quite slow even with a fast UHS-II card, though the a7 III does let you change some settings while it clears. Put your fastest card in the UHS-II slot.

Setting 4: Pick the right drive mode

Drive mode decides how many photos you take per press. Single shot is fine for still subjects. For anything moving, use continuous shooting.

The a7 III shoots up to 10 frames per second with full autofocus and exposure tracking. Digital Camera World notes the viewfinder at 10fps may not feel responsive enough for fast, erratic subjects, and suggests the 8fps live view mode for a steadier view. Imaging Resource describes that 8fps mode as having minimal lag in the viewfinder or screen.

A simple rule: use 8fps when you need to follow a subject smoothly, and 10fps when you just want the most frames. The 10fps mode also works with completely silent shooting, which is handy at quiet events.

Setting 5: Help your photos come out sharp

Blurry photos usually come from one of three things: camera shake, a moving subject or focus in the wrong spot. You have already handled focus. Here is the rest.

Leave stabilization on

IBIS is a sensor that wiggles to cancel out your shaky hands. The a7 III has 5-axis in-body stabilization rated at 5 stops of correction. Keep it on when you hold the camera by hand.

Watch your shutter speed

Stabilization calms your hands, but it cannot stop a child running across the yard. For people walking, aim for 1/250 or faster. For sports or pets at play, go faster still. If the picture turns dark, raise the ISO rather than slowing the shutter.

Do not fear higher ISO

Many beginners keep ISO low and end up with blurry photos instead. In Imaging Resource's print tests, the a7 III made 30 x 40 inch prints from ISO 50 up to ISO 800, and a pleasing 13 x 19 inch print at ISO 6400. A little grain is a much smaller problem than a blurry face.

Setting 6: Make the menus work for you

The a7 III's menus can feel like a maze. Digital Camera World's review counts 35 menu screens split into five sections, plus one custom menu page you can fill yourself. The good news from the same review: most everyday shooting settings sit behind the Fn button on the back.

A good first job is to set up the Fn menu with the handful of settings you change most, such as focus mode, focus area, drive mode and ISO. Then fill the custom menu page with anything else you reach for often.

Small menu quirks to know

• The a7 III has no AF/MF switch on the body, so you change between autofocus and manual focus through the Function menu or a button on the lens, if it has one.
• PetaPixel's reviewer pointed out that the Focus Area and Focus Settings menus reach the same focus point choices. Do not worry if both seem to do the same job.
• Focus peaking has three separate menus: one for strength, one for color and one to switch it on or off.
• Custom buttons can be set separately for photos and video, so a button can do one job in each.

Flash and portraits

If you add an external flash, the a7 III's flash sync speed is 1/250 of a second. Photography Blog notes this suits flash portraits, especially paired with Eye AF.

Sony a7 III key specs at a glance

Feature	Sony a7 III
Sensor	24.2MP back-illuminated full frame
ISO range	100 to 51,200, expandable to 50 to 204,800 for stills
Autofocus points	693 phase-detection, 93% coverage
Burst speed	Up to 10fps with AF/AE tracking
Stabilization	5-axis, 5 stops
Battery life (CIPA)	Up to 710 shots
Card slots	Two, one UHS-II
Flash sync	1/250 sec
Video	4K at 30p and 24p, 1080p up to 120fps

Should you step up to the A7 IV instead

If you have not bought yet, the newer A7 IV is the direct upgrade. It has 33 million pixels against the a7 III's 24MP, and while both shoot 10fps bursts, the A7 IV has a practically unlimited RAW buffer with a fast card. It can also use autofocus tracking down to f/22, compared with f/11 on the a7 III.

Feature	Sony a7 III	Sony A7 IV
Resolution	24MP	33MP
Burst	10fps	10fps
Tracking AF	Lock-on AF	Real-time Tracking AF
AF tracking limit	f/11	f/22

Digital Camera World argues the a7 III gives you about 90% of the A7 IV's performance at a lower cost, and the a7 III is easy to find used. For someone learning the basics, the a7 III is plenty of camera.

If you already own the newest model, the Sony a7 V settings guide covers what to change first on that body. For other Sony cameras, the general Sony camera settings guide for beginners is a good place to start.

Practice makes these settings stick

Change one setting, then go take fifty photos. Look at what worked and what did not. A blurry shot is not a failure: it is the camera showing you which setting to adjust next time. If a photo comes out soft, check the shutter speed first, then the focus area. The guide to blurry photo causes and fixes goes deeper on that, and most of it applies to the a7 III too.

For more plain-English settings help like this, the thecamera.school newsletter sends new guides as they come out.