what is the focal length of a smartphone camera


what is the focal length of a smartphone camera插图

3mm to 5mm
Typical smartphone cameras have an f of around 2.0 and a focal length of3mm to 5mm. For example,an f of 2.2 and focal length of 4.8mm for the Meizu MX4 's rear camera gives an aperture of 2.18mm diameter; BQ's Aquaris E4.5 has a shorter focal length of 3.5mm and an f of 2.4 for an aperture of 1.46mm.

How is the focal length of a smartphone camera calculated?

The focal length is calculated according to the equivalent of a 35mm full-frame sensor. For this reason, you’ll find that the focal length of the phone’s lens or lenses is expressed in the equivalent of a 35mm-format sensor instead of the smartphone’s own.

What is the focal length of the telephoto lens on iPhone?

The telephoto lens is 6mm, equivalent to a 52mm full-frame camera. The rear-facing camera on the iPhone, now called the TrueDepth camera, has a 2.87mm focal length.

What is the focal length of the iPhone X camera?

The wide-angle lens on the iPhone X has a focal length of 4.25mm, which is a 26mm equivalent. The telephoto lens is 6mm, equivalent to a 52mm full-frame camera. The rear-facing camera on the iPhone, now called the TrueDepth camera, has a 2.87mm focal length.

What is the best camera lens focal length for smartphones?

The primary camera of most smartphones has a wide-angle lens with a focal length of anywhere between 24mm and 27mm. From this camera, you can get pretty wide shots that show a decent amount of the scene.

What does 24mm mean on a camera?

So, when looking at the specifications of a smartphone camera and see that it has a camera with a 24mm lens, it basically means you’d need a 24mm lens on a full-frame DSLR camera, for example, to get the same shot with the same angle-of-view as you got with your phone camera.

What is the focal length of a 26mm camera?

In fact, a smartphone camera marketed as having a 26mm lens actually has a focal length of 4.25mm. Quite frankly, 4.25mm means nothing in true photography terms. The focal length is calculated according to the equivalent of a 35mm full-frame sensor. For this reason, you’ll find that the focal length of the phone’s lens or lenses is expressed in ...

What does 28mm focal length mean?

So, if a lens on a DSLR camera is said to have a 28mm focal length, that means that at its sharpest focus, the light converges in the lens 28 millimetres above the sensor. If the lens has a 50mm focal length, the light converges and focuses the image sharply 50 millimetres away from the sensor.

How does a convex lens bend light rays inward?

Instead of passing through just one lens, light has to pass through an array of concave and convex lenses that converge and diverge it before it reaches the focal point.

Why is it important to know the 35mm equivalent?

Knowing the 35mm equivalent is important particularly to photographers who change lenses between cameras with different size sensors because it affects the focal length. For mobile photographers, knowing the 35mm equivalent is helpful mostly in giving you an idea of how wide or narrow the angle-of-view of the lens is.

Why is telephoto better than digital?

The longer the focal length of the telephoto lens, the more the phone camera can zoom in optically. This means better picture quality than when using digital zoom.

What is the measurement of focal length?

Measured in millimetres (mm), the term ‘focal length’ refers to the distance between the camera’s image sensor and where light converges and focuses the image inside the lens.

What is FOV in physics?

FOV is our field of view in degrees, d is one of the dimensions of the sensor (for diagonal, it is d = √ (h² + w²) ) and f is the focal length in millimeters.

How big is a phone lens?

I would expect the phone lenses to usually fall somewhere around 30-50mm in effective field of view versus a full frame dSLR.

What is the meaning of "back up"?

Making statements based on opinion; back them up with references or personal experience.

Is a 5mm lens wide?

Cell phones, needless to say, have a huge crop factor. For example, the Samsung Galaxy SIII and iPhone 4 are a 7.6x crop. So, if you have a 5mm lens on one of those, you're looking at an equivalent full frame focal length of 38mm. That's wide, but not that wide... you could get far wider on any dSLR.

Why are cell phone cameras wide angle?

I know cell phone cameras are generally wide angle, which makes sense because people wanna go out to dinner, or a show, or at the park with their kids, and they want to get the whole scene. And even though digital zoom is horrible...if anyone needs to get closer, they zoom.

Is a 10mm lens a full frame sensor?

When we talk about crop-factors, what we really are talking about is the change in field of view by a smaller sensor: The reference is a full frame sensor, which is 36*24mm. Therefore, a 10mm lens on an APS-C camera is still a 10mm lens - it just happens that it offers the same FOV as a 15mm lens would on a full frame camera.

Why is the focal length wider on smartphones?

The main reason for the wider focal length in the latest smartphones is like amatoer said, there is a consumer demand for capturing casual shots in confined locations, as well as capturing landscape shots.

Why do people want wide angles?

I do not know if there is a technical reason but presume the reason for consumers demanding wider angles is, that phones are often used for social snapshots, whereby a wide angle captures more of your friends/surroundings. Also small cameras, with or without zoom are getting wider these days and perhaps this is what most people prefer. If only we could choose focal length of the camera, the same way we could choose the color of our smartphones

Can wide angle lenses be used for walk around lenses?

I agree, wide angle lenses are not ideal for walk around lenses, but thanks to newer better designed high resolution sensors, one can quite easily crop in to a narrower focal length if need be. This is what I have been doing with the Nokia 808 since it already provided a seamless real time cropping system. For the moto X Style, ensure when using the digital zoom, that it does not extrapolate extra resolution that does not exist from digital cropping.

Is a walk around lens a smart phone?

Using a moderate wide angle as a walk around lens has been common for many, many years, it did not originate with smart phones.

Do cameras take video?

Most modern cameras will shoot video to one degree or another, but these are the ones we’d look at if you plan to shoot some video alongside your photos. We’ve chosen cameras that can take great photos and make it easy to get great looking video, rather than being the ones you’d choose as a committed videographer.

Is it harder to make a wide angle lens?

I believe the larger the sensor, the harder it is to manufacture a good all round wide angle lens.

Do cell phones go wide?

It's no surprise that the cell phones have gone wide. It's what the average social snapper has been craving for decades.

What is DFOV in photography?

The DFOV (see figure below) is the angle subtended by the diagonal of the camera sensor onto the center of the lens. So if you are using the FOV specified by your camera manufacturer you gotta use the following formula. where, is the length of the diagonal.

Why should the field of view of most webcams be similar?

If you think about it, the field of view of most webcams should be similar because they expect you to be at a certain distance from the camera ( say a foot and a half ), and they would want the face to be a certain size ( not too large, not too small ).

What is the horizontal field of view of a webcam?

The horizontal field of view of many webcams and cell phones is 50 to 70 degrees.

Is the horizontal field of view larger than the vertical field of view?

It is obvious to you that since the aspect ratio is 16:9, the horizontal field of view is larger than the vertical field of view. Which one does the specification refer to ? Neither. The specification refers to the Diagonal Field of View ( DFOV ). The DFOV (see figure below) is the angle subtended by the diagonal of the camera sensor onto the center of the lens.

Is the field of view related to the focal length?

Using basic trigonometry we can conclude that the field of view ( ) is related to image plane dimension ( ) and focal length ( ) using the equation below.

What is the ISO of an iPhone X?

The iPhone X has an ISO range from ISO 24 to ISO 2304 with wide-angle lens, with a telephoto lens having a range from ISO 1200 to ISO 1440.

How does depth of field affect iPhone X?

Depth of field is also affected depending on the focal length you use. Depth of field increases when the focal length and sensor decreases. An iPhone X has a sensor measuring 7.01 x 5.79mm. Quite small compared to a DSLR with a 36 x 24mm sensor. With quite wide-angle lenses on the iPhone means you’re always going to get a deep depth of field, meaning everything is going to be in focus, front to back. If you want an image with some pleasing background blur/bokeh, then you have to switch to Portrait Mode, which adds the blur via software.

What is the focal length of the iPhone X?

So, what’s the camera focal length on an iPhone X? The wide-angle lens on the iPhone X has a focal length of 4.25mm, which is a 26mm equivalent. The telephoto lens is 6mm, equivalent to a 52mm full-frame camera. The rear-facing camera on the iPhone, now called the TrueDepth camera, has a 2.87mm focal length.

What is the focal length of a camera lens?

The camera focal length is usually measured in millimeters (mm) with one of the standard lengths being 50mm. The reason for this is that 50mm is more or less the same field of view as we see with our eyes. Well, that’s the way it works on old film cameras or full-frame DSLRs. On crop sensor cameras devices with smaller sensors, that same focal length is bigger. So, A 50mm focal length on a crop sensor can end up looking more like 80mm (more telephoto).

Why is 50mm the same as 80mm?

The reason for this is that 50mm is more or less the same field of view as we see with our eyes. Well, that’s the way it works on old film cameras or full-frame DSLRs. On crop sensor cameras devices with smaller sensors, that same focal length is bigger. So, A 50mm focal length on a crop sensor can end up looking more like 80mm (more telephoto). ...

How wide is a crop sensor?

On a crop sensor, it can be 18mm. Telephoto lenses on a full-frame camera body are 70mm and upwards. That’s about 45mm on a crop sensor. Once you get used to the millimeters thing on a lens, you’ll immediately have an idea of how wide angle or telephoto your image will be.

What does it mean to have a wide angle lens on iPhone?

With quite wide-angle lenses on the iPhone means you’re always going to get a deep depth of field, meaning everything is going to be in focus, front to back. If you want an image with some pleasing background blur/bokeh, then you have to switch to Portrait Mode, which adds the blur via software.

What is a photo magnified to show the pixels that make up an image?

Portion of a picture magnified to show the pixels that make up an image. Megapixels may also refer to the number of photosites found on an image sensor, that capture light information to produce the image. If an image has 12MP, it is very likely that it was captured on a sensor with twelve million or more photosites.

How many pixels are in a 12MP camera?

Remember, there are a million pixels in one megapixel. Therefore, a 12MP photo is made up of twelve million pixels. This is known as the ‘resolution’. The more megapixels a smartphone camera has, the higher the resolution of the photos it produces.

What is a million pixels?

These are usually really tiny dots or squares that make up a complete digital image. A million pixels are known as a megapixel. Megapixels are essentially the building blocks of a digital image. These blocks are arranged in rows and columns similar to a chessboard but on a much, much smaller scale.

How to take a panorama shot on a phone?

To take the panorama, you’d need to frame up your first shot and then capture your panorama as you pan the smartphone from left to right or the other way around .

How big is the camera sensor on the Samsung Galaxy S20?

To date, no smartphone camera has had a sensor bigger than 1”. At 1/1.33”, the Samsung Galaxy S20 Ultra’s primary camera sensor is one of the biggest smartphone camera sensors on the market today.

Why is a camera with a large sensor important?

A camera with a sensor that has large pixels is more desirable because the bigger the pixels are, the more likely you are to get great picture quality from the camera.

Why is it important to know the size of the camera sensor?

Why this is important is because the size of the sensor has an impact on the size of the pixels.

1. Sensor size (crop factor)

This is perhaps the one main thing that separates the men from the boys because, in this case, size does matter. This is because the bigger the sensor, the more light it can receive. That, in turn, makes for better pictures.

2. Pixel size

The surface of a digital camera sensor is made up of millions of pixels. They are the ones responsible for capturing the light that hits the sensor to make an image. The total number of these pixels is referred to as megapixels.

3. Aperture

Aperture refers to the diameter of the opening through which light enters the camera’s lens. How dark or bright the image will be is determined by the size of this opening which is expressed in f-stops. The smaller the f-stop number, the wider the opening and, ultimately, the more light reaches the sensor.

4. Lenses (Focal length & focal equivalent)

This is perhaps the most obvious difference between a DSLR camera and a mobile camera. Although not all DSLR cameras have detachable lenses, they’re pretty standard in a lot of DSLR cameras.

5. Optical zoom

Also related to the topic of lenses and focal length is the issue of optical zoom. So far, when talking about DSLR lenses, the main focus was fixed lenses that don’t zoom. These are known as prime lenses and their focal length never changes.

Conclusion

In my humble opinion, these are the main differences that set DSLRs and smartphone cameras apart. Are there more differences? Sure, and these can be anything from design to cost, or flash technology to the amount of AI being used.

What is the camera size of the Samsung Galaxy 9S?

On the Android side, the Samsung Galaxy 9S is similar, with 26mm-e and 56mm-e cameras. (The LG VG35 ThinQ goes the other way, with one wide angle and one even wider 16mm-e.)

What is the focal range of a cell phone camera?

It seems most cell phone cameras are in the 25-35mm wide-angle focal range, which produces less-than-desired proportions when taking photos of people.

What is the focal length of the iPhone X?

For example, the iPhone X features two lenses, one with a 28mm-e* focal length and one that is 56mm-e. That's a bit shorter than often preferred for portraits but will allow you to fill the frame with less apparent too-close perspective distortion. On the Android side, the Samsung Galaxy 9S is similar, with 26mm-e and 56mm-e cameras.

What is the meaning of "back up"?

Making statements based on opinion; back them up with references or personal experience.