43

Quick summary Yes, bigger pixels do improve performance all else being equal, and Apple is doing a good thing by focusing on sensor size. However in this case the increase in size is so slight that the difference will be negligible, probably not living up to the level of improvement you may expect from their marketing. What does bigger pixels mean? This ...


42

If you shoot from the same position with both lenses, then taking the 35mm lens and cropping it to the same angle of view of the 50mm lens will give you pretty much the same picture, other than the differences in optical quality between the two lenses and the resolution lost to cropping. But even if you were to shoot with the same lens, shooting from a ...


34

You're right that the angle of view of the iPhone camera is a little bit wider than a 35mm lens on a full-frame film camera. Up until this point, you're not really confused. But the part after that, about the small room and zoom and distance — definitely confused. :) "Zoom" means the ability to change the field of view — it isn't magnification. See What is ...


22

That's not correct. Look at this picture: The green rectangle is a 36x24 sensor. The green circle, which has a diameter of 43.3mm, is the minimal light spot needed for that size. The blue square is 36x36 sensor. The blue circle, which has a diameter of 50.9mm, is the minimal light spot needed for that size. As you can see a lens suitable for 36x24 does not ...


21

The proof is in the pudding – the focal lengths are not exactly the same as yours, but the differences are obvious...


19

A great deal here depends on when you (generally) take pictures. In particular, with bright light, a smaller sensor makes little or no difference in quality. As the light level drops, however, a large sensor (generally) gains a greater advantage. So, if you're mostly taking pictures of the view from a mountain top in broad daylight, chances are that the ...


15

In practice this is not a concern unless you have very demanding needs. Now I would preface this by saying that my view of "image quality" is that many people, particularly beginners, tend to make the mistake of thinking of that in terms of pixel level quality or technical tests of particular parameters (like ISO performance). In practice an "image of ...


15

The first mainstream applications for electronic image sensors (be it Image-Orthicons, Vidicons, Plumbicons, or CCDs, or CMOS active pixel sensors, be it analog-electronic or digital workflows) were in video, not in still images. Video followed form factors similar to movie film. In movie film, 35mm (equivalent to full frame still) or even 70mm were ...


14

Essentially, your argument is correct as long as you understand that negligible and high-price are relative terms. You are correct that you get one or at most two stops advantage between a full-frame and an APS-C sensor of the same generation. More importantly so, the advantage is lower at low ISO sensitivities with modern cameras which are essentially ...


14

Thanks to my schwifty skills in Inkscape, the rotation here is slightly off but the following shows exactly what you're comparing. These are the fields of view of a Nikon 35mm (inner) and a Nikon 50mm (outer). So even when you're getting approximately the same stuff in the frame, the 35mm is much wider, focal distances are slightly different too. If you're ...


13

In theory having more smaller pixels is better than having fewer large pixels. A small pixel will capture fewer photons and thus it's output is noisier, but by taking more samples the noise averages out, by simple resampling you can simulate the result of a sensor with fewer larger pixels. But you can do better than simply matching the result of larger ...


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

From the "Recommended For" tab of the Tamron web page for that lens: Tamron Di-II lenses are engineered expressly for digital SLR cameras with image sensors commonly referred to as APS-C, measuring approximately 24mm x 16mm. This means the image circle is sized for the smaller APS-C sensor, and is too small for a full-frame camera like the 6D. This is ...


12

For digital cameras, it's purely due to historical reasons - 35mm was the dominant size for film cameras and cinematography. As for why film cameras ended up with 35mm, I'd suggest 35 mm film and 135 film on Wikipedia as a good place to start. It's also worth noting that "35mm" is not actually the size of the image, which is 36x24 mm, but the width of the ...


12

No, a higher resolution sensor does not increase the difficulty of handheld shooting. It does mean that is is more difficult to realize the full potential of the higher resolution sensor, but that doesn't mean the results are worse than they would be with a lower resolution sensor.


12

The Redmi 6A uses the Sony Exmor IMX486 sensor, which is a 1/2.9" format sensor. Note that "1/2.9 inch" is merely a name, not its diagonal dimension (see: Why is a 1" sensor actually 13.2 × 8.8mm?). The IMX486 has a 5.04 mm × 3.77 mm sensor, corresponding to a crop factor of about 6.9×. The camera's focal length is about 3.8 mm (...


11

The same way that we can make an HDTV the same size as an old low res TV or even smaller. We make the pixels on the sensor smaller. The sensor size (APS-C, full frame, etc) refers to the size of the area that the light is focused on to. It can be very large in the case of research telescope sensors and digital medium format cameras or very small in the ...


11

It's quite simple: A lens projects what is called an "image circle" onto the sensor. A DX-only lens is designed to project an image circle just big enough to cover that sensor. An FX lens is designed to project an image circle big enough to cover a FX frame. Therefore an FX lens will work on a DX sensor properly. (But it will have an effective "crop ...


11

Many of the frequently touted reasons for larger sensors producing better images, more subject isolation, lower noise, better dynamic range, all assume you keep the f-stop constant, i.e. you use f/2.8 on a smaller sensor and f/2.8 on a larger sensor. However this question is specifically asking about what happens if you keep the DOF the same. This is ...


11

In low-light settings the quality is just not good, blurry. I really just do travel photography so don't have time to mess with settings if I am capturing scenes of people out at night in a busy Chinese pedestrian street, for example. Then get a good phone that does computational photography very well. It will think for you more than and better than any ...


10

Why does a bigger sensor lead to a shallower depth of field? In simple terms: It doesn't. If you used exactly the same lens, and only changed the sensor size, you would not get a shallower depth of field with the larger sensor. It's only when you change other variables to compensate for the different sensor size that you may get a change in depth of field....


10

Here's what you're missing: that larger formats have less depth of field for the same framing, not at the same focal length. A 100mm lens is much wider on medium format than it is on 35mm film. If you keep that and the aperture constant, DoF will be identical assuming you print with the same enlargement (that is, the medium format print will be much larger). ...


10

In the "Canon's Full-Frame CMOS Sensors" whitepaper, dated August 2006, you can read the following, which kind of answers your question, although the manufacturing technology and the costs have probably changed to some degree since 2006: Thin disks of silicon called “wafers” are used as the raw material of semiconductor manufacturing. Depending upon its ...


10

The full frame sensor will not be brighter under the same exposure conditions (Same light in scene, same focal length and f-number, same exposure time, etc.). It will collect more light, but it will also spread that light over an equally proportionally larger area. The brightness, which is defined as the amount of light energy per unit area, will be the ...


10

This is simply where the market is converging to at the moment. The typical kit lens is still 18-55mm on an APS-C sensor but most people find wider angle more useful, so some manufacturers made a few lens that start at 16mm. Olympus still sells many of their entry-level cameras with a 14-42mm which is equivalent to 28mm, while the 18-55mm mentioned earlier ...


9

Does sensor size impact the diffraction limit of a lens? No. Therefore, if the sensor is larger, and the photo-sites for the same resolution can also be larger, does this influence the diffraction limit of a lens? Not really. What it does affect is the sensor's (not the lens') diffraction limit. If so, how? If the size of the Airy disc caused by ...


9

Is it possible and why it has not been done yet ? Not necessarily. A 24x36mm sensor will easily fit in an image circle that's too small for a 36x36mm sensor. Specifically, a 24x36mm sensor requires a minimum diameter of about 44mm to cover the sensor. A 36x36mm sensor would require an image circle of about 51mm diameter. A square sensor is certainly ...


9

Not necessarily. The APS-C sensor merely crops the image that would have been captured on a full frame sensor, so you end up with what you'd get if you used a full frame and cropped in post (see: Does my crop sensor camera actually turn my lenses into a longer focal length? and Is crop-factor a bad thing?) But given a full-frame and a crop sensor of the ...


9

Crop sensors are indeed used for wildlife to get more reach without sacrificing megapixels. And, you can get closer images without spending as much money. Sure, you could crop, but then your printing dimensions will be reduced. For display on the web, at 72dpi or so, it wouldn't matter if you cropped. All that said, remember that to get the same image as a ...


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