TecnoOrange 
When I’m looking at specs for a new phone, one of the numbers I check most is the camera aperture. If you’ve seen “f/1.8” listed and aren’t sure what it means, don’t worry. The f/1.8 aperture in phone cameras is one of those technical-sounding terms that actually directly affects your photo quality.
Table of contents
Table of contents
What is aperture in photography
Aperture is basically the hole inside the camera lens through which light enters. Think of it like your pupil: when it’s dark it dilates to let more light in, and when it’s bright it contracts.
In photography, aperture is measured in f-stops (f/number). Here’s the counterintuitive part: the smaller the number, the larger the aperture. An f/1.8 aperture is larger than f/2.8, which is larger than f/4. It’s confusing at first but you get used to it.
How it affects your photos
A large aperture like f/1.8 lets more light reach the sensor. This means in low light conditions your photos will be brighter, have less noise, and need less ISO. Plus, a large aperture creates more pronounced background blur (bokeh), which is that nice effect where the background is blurry and the subject is sharp.
In short, f/1.8 aperture in phone cameras gives you two main advantages: better low-light photos and better portraits with blurred backgrounds.
Pro-tip: Don’t obsess over just the aperture number. A quality sensor with f/1.8 can produce better results than a mediocre sensor with f/1.5. Aperture is important but it’s not the only factor.
f/1.8 vs other apertures on phones
To understand why f/1.8 is so common and appreciated, let’s compare it with other apertures you’ll find in the smartphone market.
Typical aperture range on phones
- f/1.5 - f/1.7: Very large apertures. Found on flagship main cameras. Let in a lot of light.
- f/1.8: The sweet spot. Offers an excellent balance between light and optical quality. Most common on upper mid-range main cameras.
- f/2.0 - f/2.2: Medium-large apertures. Common on secondary or ultrawide cameras. Let in less light.
- f/2.4 - f/2.8: Smaller apertures. Used on telephoto and macro lenses. Need more light for good photos.
| Aperture | Light amount | Typical use | Result |
|---|---|---|---|
| f/1.5 | Very high | Flagship main | Maximum light, intense bokeh |
| f/1.8 | High | Upper mid-range main | Excellent balance |
| f/2.0 | Medium-high | Ultrawide | Good light, less bokeh |
| f/2.4 | Medium | Telephoto, macro | Needs good light |
The real advantage of f/1.8
The difference between f/1.8 and f/2.0 isn’t dramatic in practice. The difference between f/1.8 and f/2.4 is quite noticeable, especially in night shots and portraits. If your phone has f/1.8 on the main camera, you’re very well served for most situations.
How aperture affects depth of field
The f/1.8 aperture in phone cameras has a direct effect on depth of field, which is the area of the image that appears in focus.
What is depth of field
With a large aperture (f/1.8), depth of field is shallow. This means only part of the image is sharp and the rest blurs out. It’s perfect for portraits where you want the person to stand out and the background to be blurry.
With a small aperture (f/8 or more), depth of field is deep and almost everything is in focus. Ideal for landscapes where you want both foreground and background sharp.
In practice
When you take a portrait with f/1.8, the background naturally blurs in an attractive way. Background light points become soft circles (bokeh) that give a professional look. This is what many people are after when they say “I want photos like iPhone Pro shots” or “I want studio-quality photos.”
However, keep in mind that depth of field on phones is smaller than on cameras with large sensors, even at the same aperture. This is due to sensor size. A phone with f/1.8 will have less bokeh than a DSLR with f/1.8, but much more than a phone with f/2.4.
f/1.8 aperture in different lighting conditions
Let’s see how a camera with f/1.8 aperture performs in the most common situations.
Outdoor daylight shots
With plenty of natural light, f/1.8 is more than enough. The camera can use low ISO (100-200) and fast shutter speeds. Photos come out sharp, with vivid colors and no noise. The large aperture lets the sensor capture all details effortlessly.
Night shots or indoors
This is where f/1.8 makes a real difference. By letting in more light, the sensor can work with lower ISO and faster shutter speeds. This translates to less noise, fewer blurry photos, and better overall quality in difficult conditions.
Portraits
For portraits, f/1.8 creates pleasant bokeh that separates the subject from the background. The blur is natural and not excessive (as can happen with f/1.4), giving a professional look without appearing artificial.
Food and products
In food or product photos, f/1.8 lets you blur the background and make the dish or product pop. It’s the effect you see on Instagram where the food seems to “jump off the screen.”
Pro-tip: For portraits with f/1.8, make sure the subject is at some distance from the background. The farther away the background, the more blur you’ll get. If the background is right behind the subject, bokeh will be minimal.
How to choose a phone based on its aperture
If you’re looking for a new phone and the camera matters to you, aperture is a detail you should consider, but not the only one.
Look for f/1.8 or better on the main camera
In 2026, any upper mid-range phone should have f/1.8 or better on the main camera. If a phone has f/2.0 or f/2.2 on the main camera, it’s probably budget range or an older model.
Don’t ignore secondary cameras
The main camera might have f/1.8, but if the ultrawide has f/2.4 and the telephoto f/2.8, those secondary cameras will perform worse in low light. If you use zoom or ultrawide a lot, check their apertures too.
Sensor size matters as much as aperture
A phone with a 1/1.3” sensor and f/1.8 captures more light than one with a 1/2.0” sensor and f/1.5. Sensor size and aperture work together. Flagships in 2026 usually combine large sensors with wide apertures.
| Factor | Budget | Mid-range | Flagship |
|---|---|---|---|
| Main aperture | f/2.0-f/2.2 | f/1.7-f/1.8 | f/1.5-f/1.7 |
| Sensor size | 1/2.5”-1/2.0” | 1/1.8”-1/1.5” | 1/1.3”-1/1.0” |
| Night quality | Acceptable | Good | Excellent |
| Portrait bokeh | Limited | Good | Excellent |
Myths about f/1.8 aperture
There are some misconceptions about f/1.8 aperture in phone cameras worth clearing up.
”Lower aperture is always better”
Not necessarily. An extremely low aperture (f/1.2) can cause chromatic aberration and edge softness issues. f/1.8 is the sweet spot where you get plenty of light without sacrificing optical quality.
”f/1.8 on a phone is the same as f/1.8 on a DSLR”
No. Sensor size is very different. A large DSLR sensor with f/1.8 will produce much more bokeh than a small phone sensor with the same aperture. But a phone with f/1.8 is still significantly better than one with f/2.4.
”Only auto mode aperture matters”
No. Pro and portrait modes use aperture differently. In auto mode, the camera may close the aperture for more depth of field if it deems necessary. In Pro mode you control the aperture directly.
FAQ: Frequently asked questions
Is f/1.8 or f/1.5 better?
f/1.5 lets in slightly more light, but the difference is small. In most practical situations you won’t notice the difference. f/1.8 offers an excellent balance between light and optical quality.
Does f/1.8 aperture work on all phone cameras?
No, usually only the main camera has the lowest aperture. The ultrawide and telephoto typically have higher apertures (f/2.0-f/2.8).
Can I change the aperture in manual mode?
On some phones yes, on others no. Some phones have fixed aperture (can’t be changed) while others allow adjusting it in Pro mode. Check your model’s specs.
Does a low aperture drain more battery?
Not directly. But low-light photos (where low aperture helps more) may require more image processing, which indirectly consumes a bit more battery.
Conclusion
The f/1.8 aperture in phone cameras is the sweet spot for most users. It offers excellent low-light performance, attractive bokeh for portraits, and a perfect balance between light quantity and optical quality. When choosing your next phone, look for f/1.8 or better on the main camera, but remember aperture is just one piece of the puzzle. Sensor size, image processing, and software quality are equally important.