Samsung Galaxy S9 camera close up

Samsung Galaxy S9 camera close up

In this article we are going to take a close look at Samsung galaxy s9 camera tech, most importantly the variable aperture feature. We will explain that how it is going to be a step forward for the Smartphone photography.

A few weeks ago when the Samsung Company released the two phones Samsung s9 and s9+ and the phone received a mix reaction from the fans and reviewers.

The phone is not much change from the s8, the fingerprint sensor has been moved around, but it didn’t change the overall look of the phone. It is the same old phone in term of looks with negligible changes in day to day performance of the phone.

The inside of the phone also seems the same as the recognizable iteration of grace ux running on top of android Oreo in the s9.

The only thing that has been changed in s9 is the camera. Samsung said that it is the first phone with the variable aperture, on the other side the s9+ has dual cameras, another change in the Samsung smart phones which have been using single lens.

How does it make the s9 and s9+ different from the other entire cameras beast and other flagships? How it can be better than iphone x or Samsung galaxy s8?


All the answers to the questions lie in the aperture or the f number you have seen thrown around with Smartphone cameras.

In geek speak; f/1.9 is larger aperture than f/2.4. The lower the number is the larger the aperture is. The larger aperture means that the hole of the camera is big. And that means that more light can get enter into the camera, resulting in detailed pictures in low light.

On the other side if you are trying to snap a bright image with panoramic view, then small aperture will helps as more light would just make everything difficult to recognize.

aperture and lighting

aperture and lighting

This similar to the working of human eye, as the human eye pupil get bigger and smaller depending upon the light intensity.

As it isn’t that much simple as increasing camera aperture to get clear picture. There is another reason that Samsung added f/2.4 option in s9.


In camera sensors there are a lot of lens elements behind the aperture. They dictate that how the light gets enters into  he lens and help achieve a certain level of magnification in order to make sure that the final picture looks sharp and don’t get blurred out due to over magnification.

In simple words a large camera sensor needs bigger final lens element and the opposite is true for smaller sensors, which needs large initial lens elements.

Samsung is using dual aperture options, this shows that the company believes an f/1.5 sensor would come with some tradeoffs for better detail in low light. The f/2.4 covers for these problems.

Pupil dilating gif

Pupil dilating gif

DSLR aperture gif

DSLR aperture gif

When you switch from one aperture to another, a shutter blocks some of the outer elements that could make some problems in your photos. Similar to the dslr camera working.

Some of the problems due to switching to the higher aperture include, but are not limited to edge softness, purple color on some of the objects and due to strong light sources the lens flare.

The other Smartphone cameras that don’t have variable aperture have to balance out having a large aperture with better lens element placement to avoid such problems.

In bright light the camera IOS setting are lower to make it sure that the sensor is exposed or enough time. On the other hand the higher IOS is used in low light as the sensor needs less light to make a legible image.

Check the images and see that the pictures from IOS 200 are brighter than the pictures from IOS 100.

ISO and lighting

ISO and lighting

Samsung is using lower IOS in their phones; the s8 uses lower IOS setting as compared to what its rival use for similar light.

Along with the lens f/1.5, this would be problematic as a high IOS with fast shutter would result in getting some of the details in the picture overblown. For example if we take a picture of a brick wall from a distance in low light we won’t be able to differentiate between different bricks and they would look mix up together.

The other example is of a cloudy sky if we take a picture of that it would look like a big white block instead of the actual clouds.

Changing to f/2.4 would fix this problem as a high IOS would help in bright light, despite being counter intuitive as higher IOS is normally reserved for low light images.


In other cameras of smart phones, a single aperture would be needed to have a lower overall IOS with specific lens element placement to make best out of any given scene or light condition. The example would be HTC’s U11+, which not only take detailed picture and vivid low light images, it also take pictures quite good in bright light as well.


Besides being the same as the last year Samsung s8, the s9 is a major leap in smart phone photography thanks to its aperture feature. Due to this tech now every smart phone is using this tech as Mother Nature does with human eyes or animal eyes. Now we can achieve the result of dslr through the smart phones with aperture feature, and this feature made the professional cameras stand out.


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