Best Prime Lens for Sony A7III, A7II & A7RIII


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When using a premium camera, it’s undeniable that you’d want to ensure you are using the best lens possible. With prime lenses often offering better quality for a lower price, it’s no surprise that many photographers are on the hunt for the best prime lens for Sony A7III cameras.

The standard kit lens of 28-70mm that comes with the Sony A7III is a solid lens, however, adding a prime lens as a second or third lens allows you to dramatically increase the range of photos that you are able to take. Whether you want to get epic night shots or beautiful portraits, the appropriate prime lens for your Sony A7III camera will help you achieve that.

If you’re not sure which the best lens for Sony A7III cameras is for you own personal situation, read on to see the options that are currently available on the market. As all these lenses are E-Mount with a full-frame sensor (unlike prime lens for Sony A6000 cameras which use an APS-C sensor), they are also suitable if you are looking for the best prime lenses for Sony A7II or A7RIII cameras.

Want a quick answer? My choice for the best prime lens for Sony A7III cameras is the Sonnar T* FE 35mm F2.8 ZA for an everyday prime lens or the FE 24mm F1.4 GM for a wide-angle prime lens.

Sony A7III Prime Lens Comparison

Sony A7III Prime LensDescriptionPrices
Sonnar T* FE 35mm F2.8 ZA
BEST EVERYDAY PRIME LENS
Range: 35mm
Aperture: f2.8
Weight: 120g/4.3oz
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FE 24mm F1.4 GM
BEST WIDE ANGLE PRIME LENS
Range: 24mm
Aperture: f1.4
Weight: 445g/15.7oz
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FE 20 mm F1.8 G
ALTERNATIVE WIDE ANGLE PRIME LENS
Range: 20mm
Aperture: f1.8
Weight: 373g/13.2oz
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Sonnar T* FE 55mm F1.8 ZA
ALTERNATIVE EVERYDAY PRIME LENS
Range: 55mm
Aperture: f1.8
Weight: 281g/10oz
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FE 85mm F1.4 GM
BEST PORTRAIT PRIME LENS
Range: 85mm
Aperture: f1.4
Weight: 820g/28.9oz
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FE 135mm F1.8 GM
ALTERNATIVE PORTRAIT PRIME LENS
Range: 135mm
Aperture: f1.8
Weight: 950g/33.6oz
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Choosing a Prime Lens for the Sony A7III

Determining for the best prime lens for Sony A7III cameras comes down to ultimately understanding what type of shots you want to be taking and what limitations you feel your current lenses have.

If you’re searching for a prime lens that takes epic wide-angle shots on your Sony A7III, you’re going to need a very different lens compared to people searching for a prime lens to take portrait shots on the Sony A7III. In both these situations, you’re probably looking to purchase a prime lens for your A7III that acts as a second or third lens rather than a replacement for your 28-70mm kit lens.

Alternatively, if you are the type of photographer that prefers to walk around with prime lens on the day-to-day, then you might be looking for a mid-range focal length that can be more flexible and used in a variety of situations. All in all, regardless of your situation, then is like already a prime lens on the market that is suitable for you! Keep in mind that the Sony A7III, as well as the Sony A7RIII & A7II, are premium camera models, so you’ll need to expect premium price tags when choosing a prime lens for your camera!

A prime lens can help you shoot in low light situations

Best Prime Lens for Sony A7III

The following lenses all have their own unique advantages and disadvantages when it comes to choosing a prime lens for your Sony A7III cameras.

Sonnar T* FE 35mm F2.8 ZA

If you’re looking for a prime lens for your Sony A7III camera for the purposes of replacing your existing kit lens and having a lens that is suitable as a day-to-day lens then the Sonnar T* FE 35mm F2.8 ZA is a great option.

The Sonnar T* FE 35mm F2.8 ZA has a versatile focal length of 35mm making it perfect for a variety of shooting situations and its light weight of 120g (4.3oz) makes it ideal for a minimalist photographer and for people looking for a great travel lens. With a fixed aperture of f2.8, you also have a lot of flexibility in terms of shooting in low light and creating beautiful bokeh in your shots.

The Sonnar T* FE 35mm F2.8 ZA is an ideal choice for photographers looking for a day-to-day prime lens that can be used in a variety of situations and works as a direct replacement for the standard kit lens.

FE 24mm F1.4 GM

If you’re looking for a prime lens that can take spectacular wide-angle and landscape shots then the FE 24mm F1.4 GM makes a strong case for being the best prime lens for Sony A7III cameras.

The FE 24mm F1.4 GM has fantastic resolution and its maximum aperture of f1.4 allows you to take amazing photographs at night or in very low light. In my opinion, it works best as a complementary lens if you’re looking to be able to take better landscape shots or night photography than your current lens allows.

The FE 24mm F1.4 GM weighs 445g (15.7 oz) and also has a number of controls on the lens itself such as a focus hold button, auto and manual focus switch and aperture switch that gives the photographer more control. All in all, this lens is a fantastic option if you’re looking for a premium wide-angle prime lens for your camera.

FE 20mm F1.8 G

An alternative option if you’re looking for a wide-angle prime lens for your Sony A7III, the FE 20mm F1.8 G is a good choice if you’re not wanting to spend on a premium lens.

The FE 20mm F1.8 G allows you to take super-wide-angle shots with its fixed focal length of 20mm and still offer superb resolution and photo quality, even if it is a slight step down from the FE 24mm F1.4 GM. With its maximum aperture of F1.8 it also means that you lose a bit of flexibility at low light but you can still certainly get great night and low light shots with this lens.

The FE 20mm F1.8 G weights 373g (13.2 oz) and has a range of controls on the body of the lens such as auto/manual focus switch and a focus hold button. It’s a great light lens that is perfect if you’re looking to expand your landscape range on a relative budget – after all, even the most budget lenses for the Sony A7III aren’t cheap!

Sonnar T* FE 55mm F1.8 ZA

If you’re looking for an alternative option for a prime lens to use as a day-to-day lens, then the Sonnar T* FE 55mm F1.8 ZA is certainly worth considering.

This lens is ideal if you’re the type of photographer that wants a day-to-day lens but tends to take more portrait and street photography rather than wide-angle landscape shots. The 55mm focal length is a great range for this and as the Sonnar T* FE 55mm F1.8 ZA weighs only 281g (10oz) it’s ideal for people looking for day-to-day travel lens for their Sony A7III.

The Sonnar T* FE 55mm F1.8 ZA creates beautiful shots at all times of day and is a great prime lens for your Sony A7III camera and certainly a possible replacement for the standard kit lens.

FE 85mm F1.4 GM

If you’re looking for the best prime lens for Sony A7III or A7RIII cameras because you want to be able to take spectacular portraits and are after a complementary lens to your standard kit, then the FE 85mm F1.4 GM is a great option for you.

The FE 85mm F1.4 GM allows you to take beautiful portraits in all types of light with its superb image quality also resulting in beautiful bokeh backgrounds. The lens weighs 820g (28.9 oz) meaning it’s not ideal for a minimalist traveller but its weight is a small price to pay if you’re looking for a superior portrait lens for your Sony A7III camera.

The FE 85mm F1.4 GM is also packed with features on the lens itself similar to some of the other models listed in this guide. All in all, if you’re looking for a prime lens because you want to take amazing portraits then you can’t go wrong with the FE 85mm F1.4 GM.

FE 135mm F1.8 GM

An alternative prime lens for Sony A7III cameras if you’re looking to shoot portraits is the FE 135mm F1.8 GM. With a focal length of 135mm, this lens is really ideal if you’re looking for the ability to get those stunning close-up portraits with a beautiful shallow depth of field background.

The FE 135mm F1.8 GM lens weighs 950g (33.6 oz) and comes at a premium price point meaning it’s best saved for experienced photographers who know that the type of shots they want to shoot will be suited for this type of lens.

It has the same range of controls on the body of the lens as the FE 85 mm F1.4 GM so the choice between the two ultimately comes down to what focal length you prefer to shoot with!

There is a large selection of prime lenses for Sony A7III cameras available on the market and the choice around which is best for you ultimately comes down to your photography needs and the lenses that you already own. Regardless of your choice, all these options will be sure to leave you with beautiful photos!

Are you looking for the best prime lens for Sony A7III, A7II or A7RII cameras? Which do you think is the best? Let us know in the comments below!

Michael is the founder of Capture That Snap, a website dedicated to helping photographers improve their craft. He loves travel photography and is always on the hunt for new destinations to explore and shoot.

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