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36

Firstly the iPhone 5 lens has to be f/2.2, due to the small pixel size, the effects of diffraction which start to creep in at f/11 on a DSLR, start to creep in at f/1.45 on a 5.6mm (diagonal) sensor! I though that in order to have a big aperture such as f/2.2 a big amount of light should be able to enter to the sensor and in order to do it, a big lens was ...


29

There is no clear answer: That depends on your type of photography. If you want the camera just to take the usual this and that photos, you are probably not missing out very much. The computational support in the phone has come quite a way. However, you will notice some limitations: Due to the small sensor, the performance in low light is limited. The phone'...


22

The sensors and lenses of even the most humble DSLR or mirrorless interchangeable lens cameras (ILCs) currently on the market are far better than those found in the best phone cameras. Sensors and glass can only take one so far, though. The current crop of top smartphones have leveraged the power of computational photography¹ in a way that most ILCs don't. ...


14

The easiest way is to take a Live Photo, then while viewing it in the Photos app, swipe up to access effects and choose Long Exposure. This will blend the frames of Live Photo together into a single image. I'm not sure how necessary a tripod is for this; since you're expected to hold your phone while shooting, I'd imagine the stabilization+blending software ...


14

(I'm promoting my comments to an answer now that I have a little more time.) In addition to all the points brought up in other answers, there are several non-technical, "user experience", reasons that a DSLR is superior to a smart phone. The first relates to the "immediacy" of the controls. After a few (dozen) hours using a camera the ...


13

Many older or cheaper phone cameras use a "fixed focus" lens. ie it is always set to focus a specific distance away from the camera. This is usually set to the "hyperfocal distance", ie everything from half that distance out to infinity is in focus. This depends on just what is acceptable as 'in focus'. But most photos from these cameras will be sharp ...


13

For whatever reason, the ColorSpace tag is not very useful in EXIF. The only standard values are 1 (sRGB) and 65535 ("uncalibrated"). All other values are reserved. Some cameras use them to mean Adobe RGB or something else, but this is non-standard. Apple is, in fact, using Something Else, and that's found elsewhere in the metadata. With ExifTool, looking ...


12

According to this the iPhone SE has an 29mm-equivalent lens, so on a Fuji with a 23.6x15.6 sensor (Fuji XT-3)(crop factor 1.53) you need a 29/1.53=19mm lens for the same field of view.


9

F values are relative to the focal length; the absolute aperture size of an f/2.2 lens is 1/2.2 times the focal length of the lens. Cellphone cameras have tiny sensors and thus large crop factors - their focal lengths are typically only a few millimeters. Even with a large relative aperture the absolute size of the aperture is only a millimeter or two.


9

Assumptions I think this is a combination of using digital zoom (or cropping) and flash. I don't own an iPhone SE but a Samsung S8. On a high level they have comparable cameras though. iPhone SE camera specs (it doesn't specify what wide is unfortunately): 12 MP, f/1.8 (wide), PDAF, OIS Samsung S8 camera specs: 12 MP, f/1.7, 26mm (wide), 1/2.55", 1....


9

On top of what has been said, part of a photographer's skills is to make arbitrages between light received, exposure time, and depth of field. With a smartphone, you may experiment with framing, which is very important, but you won't really be able to experiment with light, exposure and depth of field. In a sense, it is like learning to play guitar with only ...


9

Conversion of iPhone Images to jpg is a "feature" of Synology's DS Photo app. Per the DS Photo page To ensure optimal compatibility with Photo Station, DS photo will convert photos in HEIC format to JPEG format when uploading photos with devices running on iOS 11 or above. To go further, DNG is a container that holds a TIFF and a bunch of ...


8

It depends on which camera app you're using, and on which version of iOS. If you're using Camera.app (the inbuilt camera app) on iOS 10.2 or later: Camera.app uses only the middle two lens identifications in the list above — the ones that say "iPhone 7 Plus back dual camera". Depending on which lens was used, you'll get either "3.99mm f/1.8" or "6.6mm f/2....


8

Third-party camera application It does not appear that the default application on iOS has any fine-grained control mode. But you can achieve that if you use a third-party camera application that gives you access to it. This page examines how to achieve the kind of control DSLR camera users are accustomed to, and it specifically mentions long exposure of ...


8

Does this imply that during the backup the contens of the DNG file have been converted from a TIFF format to 8-bits JPEG? Yes. Personally at this point, I would regard the Synology system as not fit for purpose and find a different backup system.


7

Absolutely. There is a great dongle+app, offered by TriggerTrap. I purchased it and I'm super happy with it. If I recall correctly, the app is available for iOS and Android. EDIT: Some of the free app's options are as follows: Simple cable release Press and hold Press and lock Timed release Timelapse TimeWarp (time lapse + acceleration) DistnaceLapse (...


7

TL;DR: yes, the video mode is cropped by approx. 1.28× (calculated by measurement). The effective video focal length is 36mm (in 35mm equivalent). I read (in a user comment) that the iPhone's focal length is longer when shooting video because the frame is cropped slightly to enable video stabilization. Is this true? It appears to be true that the video ...


7

With phone cameras it is as much about the computational things done to it after the raw data is collected from the sensor as it is about the hardware specs. You can certainly use hardware bad enough that no amount of computational photography will overcome it. But by and large most of the hardware used in upper tier phones is good enough. It's often how ...


6

No, larger sensor cameras are not more likely to mis-focus - if you take the Canon 1DX (with a modern lens) for example, it's a full-frame camera that's about as far away from "likely to mis-focus" as possible. But when a large sensor camera mis-focuses it's more noticeable, especially when most tiny sensor cameras (cellphones) have wide angle lenses. The ...


6

Nope. The reason is that all of the raw data is not represented in any single interpretation of that data used to produce a JPEG image. Much of the raw data has been discarded and can not be recovered. When you open a raw image file with an application what you see on the screen is not the unfiltered, raw data. It is one interpretation of the raw data based ...


6

I got some decent fireworks pictures from this year's Fourth of July show. At this point I'd expect you to stop as you don;t actually have a photographic problem. I was bragging about my "real" camera's ability to take shots like that compared to an iPhone. I'd regard that as the real problem here. If your photo is genuinely better than your friend's ...


6

The iPhone has a relatively wide fixed aperture. For example, on iPhone 7 Plus, it's f/1.8 for wide-angle and f/2.8 for telephoto. Since the aperture is fixed, according to exposure triangle proper exposure must be obtained only by adjusting shutter speed and sensor sensitivity. Fastest shutter speed 1/8000s is similar to what you'd see in a larger camera, ...


6

Your options for resizing the 16:9 image mentioned to be 1:1 in size are Crop it Letterbox it Stretch it Let's pretend the image is 16x9 instead of 16:9 (units are irrelevant.) Crop, taking the sides off so that the image becomes "9x9." This is the most obvious way but OP states it is undesirable Letterbox, place blank space above and below so that it ...


6

You can convert your phone into a make-shift macro camera by applying a small drop in front of the lens. In humid conditions when water is condensing or during rain etc this might occur accidentially. The drop size determines the extend of the macro effect (smaller drops mean smaller focal lense, thus stronger macro effect). There is a very brief description ...


6

It's called lens flare. Light from the sun that is just out of frame is striking the surface of your camera's lens or surrounding housing and bouncing around inside the lens. Some of that light is included in the part of the image circle that falls on the camera's sensor. There are many different types of lens flare. In addition to the more well known cases ...


5

I know that you asked for a non-command-line solution, but I think that this one is simple enough to post. Moreover, I noticed the "no CLI" only after I wrote it, so... maybe could be useful for someone else. There is an example doing exactly that (although for a different objective --- long exposure without ND filters) that I think it is what you need in ...


5

You could try using Registax. Generally, Registax is used for astrophotography, particularly of the planets in our solar system. Registax uses the concept of superresolution to stack hundreds or thousands of frames, discard the worst, keep the best, then interpolate the information from all of those frames in such a way that it enhances detail and resolution....


5

The unflattering faces due to perspective is from being way too close. The nose is significantly closer than the ears. The left ear and right cheek are seen from different angles. That is unlike how faces are normally seen. back up. Don't take a picture from closer than you would normally view someone. The size distortions are easily corrected. The ...


5

It looks like the rolling shutter interacting with the vibrations. It could be scanning horizontally, and the vibration comes in pulses. You could see it in a Big-Small-Big-Small pattern, from left to right.


5

I don't have the reputation to comment, so am adding this bit as an answer. In addition to the answer by @Jahaziel (camera position, lighting) - also check out scanning applications like Genius Scan. The app uses your camera, auto-crops, and then bumps the contrast to clearly show a white page and black writing.


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