Questions tagged [smartphone]

A smartphone is a telephone that is also capable of running programs, usually called Apps. They almost always have cameras in them.

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28
votes
6answers
7k views

What could be the reason for these block-like artefacts in the blue sky?

I'm using the Huawei P10 with its Leica camera. Recently I noticed very visible large block-like artefacts in the sky. These artefacts are present on some pictures, but not on all, and they are ...
24
votes
4answers
82k views

What is the purpose of a dual LED flash?

I see that some smartphones now have dual LED flash. What exactly is the purpose of a dual LED flash? Anything to do with brightness? What can a dual do that a single flash cannot? Would a triple LED ...
24
votes
6answers
70k views

How well do smart phone light meter apps work?

There are a number of smart phone apps which use the phone's camera as a light meter. How well do these work? The metering built into most modern cameras is very powerful and accurate, but in some ...
21
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2answers
42k views

How does focus work on mobile phone cameras?

How does focusing work on mobile phone cameras? Aren't their optics simple enough to not have any moving parts whatsoever? If so, how come most smartphones have an auto-focus, and with various ...
19
votes
3answers
7k views

How can a smartphone take pictures of a landscape with everything in focus?

After the announcement of the new Samsung Galaxy S9 with the new camera that changes aperture, I caught myself wondering: if smartphones have such a wide aperture (f/2.8, f/2.2, etc), how are ...
17
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7answers
11k views

Why is this smartphone picture better than this dedicated camera picture?

The other day I went hiking through a mountain in west Tokyo to take wilderness pictures for reference for the new videogame I'm working on. For the past few years, I've only relied on my smartphone ...
16
votes
13answers
7k views

How important is a good quality camera for good photography? [closed]

Don't know if this is already a known thing/wiki/previously asked here, but basically: How important is a good camera for actually making strides in photography/doing well? I've done some photography ...
15
votes
8answers
9k views

Can an old DSLR be upgraded to match modern smartphone image quality

I love photography, however, I had a 5 years break. I am on budget. I got my old canon eos 500d (standard lens kit) and was impressed how badly it compares with modern smartphones. I wanted to get a ...
13
votes
6answers
932 views

Continue taking photos from smartphone or buy a camera to practice?

I know this is a site with very good professional photographers and this might appear like a silly question but I'm just a beginner who loves photography. But I still don't have a camera so all I do ...
11
votes
4answers
2k views

How to choose a good smartphone if the top priority of the user is photography?

At the current rate by which technology is improving, I believe that mobile photography is not far behind their DSLR counterparts, generally speaking. However, for amateurs like me, it is quite ...
9
votes
3answers
3k views

Is it possible for a phone manufacturer to enable camera raw through a software upgrade?

So, I'm considering getting a new phone - the Galaxy S6 - but, even though Android Lollipop supports it, this phone does not have the ability to shoot in camera RAW. My question boils down to this: ...
9
votes
5answers
44k views

What causes these streaked rays from light sources?

I recently bought an LG G4, whose camera can shoot in an auto and both manual mode (I can manually set the iso, aperture). I shoot 100% of the time in auto. It takes better than average photos at ...
9
votes
1answer
4k views

Can a photo app for Android improve image quality?

Is there an app to post-process the photos (taken by phone's camera) to improve their quality ? I was told that IPhone makes better photos because of good (built-in) post-processing software. Is ...
8
votes
1answer
873 views

How to estimate pixels per degree for an image from a camera phone using EXIF data?

This is my first time to look at metadata and I'm confused by the focal length stated in this file that a friend e-mailed to me. It was taken with a cell phone. I'm trying to roughly estimate the ...
7
votes
5answers
4k views

Does the detail in an image affect how large the image file is?

I just took two photos on my smartphone. One of a table surface with nothing on it and another of a cluttered table top full of detail. The clear photo was 3.5 MB and the cluttered one was 5 MB. How ...
7
votes
2answers
51k views

What is the focal length on your typical cell phone camera?

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 ...
6
votes
6answers
16k views

is it possible to get “bokeh balls” using a cellphone camera?

Is it possible to get "bokeh balls" using an cellphone camera? I'm using an iPhone but the question could apply to any cameraphone. bI'm sure there are a lot of apps which allow you to insert fake ...
6
votes
1answer
9k views

Why the faces in the corner tends to skew a bit in almost all smartphone cameras

I have noticed in almost all the smart phones I have used, the faces of people in the corners (either side) tends to skew a bit in all smartphone cameras. Is it something the lens is not as good as ...
5
votes
3answers
9k views

Why do different smartphones with the same megapixel camera resolutions have different quality of image?

There are different brands of smart phones available. Frequently two different big brand smart phones (Nokia, Samsung , Apple, Sony etc.) with the same Megapixel count have a different quality of ...
5
votes
2answers
345 views

Circular Pattern in Night Sky Image

A few days ago I took a night sky image of the milky way with my XPERIA 1 II and wanted to take a closer look at the RAW file in Lightroom Mobile. When doing so, I realised a strange circular pattern. ...
5
votes
2answers
563 views

Is “Ultrapixels” just marketing or is there a real benefit?

HTC has branded the sensor in its new phone (the HTC One) to be "Ultra pixels". For the same sensor size it only gives you 4MP where today's standard for top of the line smartphones is 8MP and up. Of ...
5
votes
3answers
2k views

Phone camera (Samsung S4): is it possible to determine the distance to the object in focus on jpg picture?

I took a picture with Samsung S4 phone. Is it possible to determine the distance to the object on the picture? The object is in focus. I looked at the JPG picture properties but could not find ...
5
votes
1answer
675 views

How to create a denoising profile for darktable

I tried to create a denoising profile for my Google Nexus-5 smartphone as described in a blog post. I shot some pictures, one per ISO setting (100,200,400,800,1600,3200) with OpenCamera which are ...
4
votes
5answers
8k views

Why don't smartphone cameras correct pincushion distortion automatically?

I've previously asked why the GoPro doesn't automatically correct for the fisheye distortion, and this question is related, but different: Given that smartphones have so much processing power nowadays ...
4
votes
3answers
906 views

How to take photos of planets with smartphone?

I'm not sure if this the right forum to post this question. I'm trying to find what is the best option to take photos of planets using smart phone. I have a Google Pixel XL, and I'm looking for a good ...
4
votes
4answers
4k views

Why my DSLR is not as sharp as my smart phone?

I recently bought a Nikon D5500 camera with two lenses: 18-140mm f/3.5-5.6G ED VR and 50mm f/1.8G. When I compare the results with my advance smart phone (Samsung Galaxy Note 5), the sharpness is not ...
4
votes
1answer
1k views

Why is the field of view angle from exiftool different from Apple's official values?

I have two series of photos shot on my iphone 6s on 10.3.2. The first series is in the regular frame, and the second series is in the "square" frame. I'm using exiftool 11.01 on macOS 10.11.6. From ...
4
votes
2answers
2k views

Why the highest resolution on smartphones is obtained for 4:3 aspect ratio?

The max rectangle area that can be enclosed in a circle is actually a square. This means that ideally a 1:1 aspect-ratio sensor would be able to collect more information than any other aspect ratio ...
4
votes
1answer
503 views

Are all the RAW files the same?

I have an android phone that is able to take the photos on RAW mode. Would it contain the same information as a DSLR camera? That brings another question, do the raw photos from all the DSLR cameras ...
4
votes
1answer
162 views

Giving compact digital camera a Brain

I read this article Give your DSLR a brain by connecting an android phone and was amazed by how a DSLR camera can become a much smarter device after connecting with an Android phone (with the help of ...
3
votes
2answers
1k views

How do recent smartphone obtain higher resolution pictures through pixel binning

First of all I should assert the fact that I have no particular knowledge in photography. I am not qualified to understand technical processes. However, I recently came accross some debates about ...
3
votes
2answers
120 views

Smartphone shutter speed

My impression is that a smartphone has no physical shutter. Rather, it admits light to the sensor's photo-sites under the control of some on-and-off, or perhaps read-twice-and-subtract, electronic ...
3
votes
1answer
3k views

Camera Phones with longer focal lengths for Portraits?

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. Some phones have a "portrait mode", but this ...
3
votes
2answers
988 views

Does reducing the resolution on phone cameras increase pixel size?

I understand that cameras are limited in processing power, and that it is better to manually resize photographs taken using them. One of my experiences: The Asus Zenfone 2 has a lowlight mode, which ...
3
votes
2answers
3k views

How to estimate camera sensor size?

I am using a smartphone for capturing photos and I need to estimate the camera sensor size (mm*mm). I have the resolution (in pixels) and the focal length (in pixels). I can also measure the size of ...
3
votes
2answers
2k views

Can the Canon 6D connect to a phone's WIFI hotspot and talk to the Canon app on that phone?

Is the Canon 6D capable of talking to a phone over the phone's WIFI hotspot? What I want to accomplish is to connect the camera to the phone without losing internet access for easy sharing of images ...
3
votes
1answer
77 views

Is there a way to use my phone's dual LED flash with my NEX?

My phone has a dual LED flash that's supposed to match the color temperature of the scene, preventing color balance problems like this. I do a lot of night photography, and I use my NEX-5R. The NEX ...
3
votes
4answers
401 views

Use phone location data for photos

I used a Canon 6D before which geo-tagged my photos, but switched to a 5D mk III for a while which does not have a built-in GPS. I miss this information a lot. Canon external GPS is expensive and ...
3
votes
1answer
174 views

Where can I find lens mounts for small 2 mm diameter lenses?

I need a lens mount for one of my projects. I have a CCD chip, a single lens (2 mm diameter), and I know the mechanical position and tolerances. I would like to find a lens mount for that lens or see ...
3
votes
2answers
293 views

Can I use a plano convex cylindrical lens, instead of a fisheye, to shoot 360°x180° panos with my phone?

Is it possible to use a plano convex cylindrical lens (like this) instead of a fisheye lens to make a panorama photo? The idea is that the lens would give you 180° vertical and by turning the camera ...
3
votes
0answers
62 views

increase resolution by taking several pictures - is it done? [duplicate]

What if I took two or more picture of the subject quickly one after another, then used these images to increase resolution? It seems to me that if I take two pictures of the same thing, then my ...
2
votes
3answers
749 views

Why is there a purple blur around fire in photos?

Why is there a purple blur around fire in photos? I'm using a Sony Xperia phone.
2
votes
3answers
380 views

Do phone cameras expose to the right?

When I take a RAW photo on my Nexus 5x, I got an overexposed photo: Here's the in-camera JPEG for comparison, which is properly exposed: Do smartphone cameras generally expose to the right? I've ...
2
votes
5answers
151 views

What hardware specifications make a great phone camera?

I know that iPhones have great cameras but what technology underlies great phone cameras? Intuitively, the number of megapixels is only a tiny part of the story. From wikipedia, I can see the iphone ...
2
votes
3answers
1k views

Use phone as an external flash

I have a DSLR that was given as a present and I cannot afford a real external flash, however the flash on my phone is powerful enough to use. The reason I wanted to use an external flash is to have ...
2
votes
2answers
261 views

Is it possible to use a smartphone/tablet's 3G/4G network to transfer Eyefi photos?

I know that Eyefi cards can use Wi-Fi networks to transfers photos. I also know that there's some sort of smartphone/tablet app that you can download to do various things with your Eyefi card and ...
2
votes
3answers
12k views

Why don't smartphones default to 4x6? [duplicate]

The most common ratio of picture to print (by far) is 4x6. So why don't smartphones default to this aspect ratio?
2
votes
1answer
128 views

Weird orange artifacts in smartphone image of a white light source [duplicate]

In my work (lab research), I have need to take digital photos of thin transparent gels sitting on and being illuminated by a white light box. When I try to take a digital photo, weird orange bands ...
2
votes
1answer
334 views

Will a clip-on zoom lens correct the distortion of a wide-angled smartphone lens?

My friend wants to shoot a vlog style series and she doesn't currently own a DSLR, so she was going to shoot with her smartphone. I am aware of the natural distortion of features (noses, foreheads, ...
2
votes
1answer
155 views

Why do I need an add-on lens to take smartphone macro photos?

Why do you need an external macro lens for a smartphone to take macro photos. Why can't the smartphone lens itself take macro photos?