Linked Questions

0
votes
3answers
575 views

Megapixel number - how many sub pixels? [duplicate]

I read conflicting information about the megapixel - subpixel relationship when it comes to sensors in digital cameras. I read that megapixel is number of sub pixels and I also read megapixel is ...
1
vote
2answers
278 views

What exactly a Raw Image format encodes? [duplicate]

Ok, I have in mind that a picture P can be represented by a two dimensional matrix A where each element of A (aka every pixel) is a vector with four coordinates (Red,Green,Blue). What extra stuff is ...
305
votes
16answers
60k views

Good examples of RAW's advantages over JPEG?

I'm curious to see some real examples of where simply capturing the same photo in RAW (and being processed by someone who can do it justice) has significantly improved the photo at the end of the ...
94
votes
4answers
16k views

What does an unprocessed RAW file look like?

I know people use fancy software like Lightroom or Darktable to post-process their RAW files. But what if I don't? What does the file look like, just, y'know, RAW?
56
votes
7answers
26k views

Why are Red, Green, and Blue the primary colors of light?

Colors don't have to be a mixture of red, green, and blue because visible light can be any wavelengths in the 390nm-700nm range. Do primary colors really exist in the real world? Or did we select red, ...
48
votes
8answers
17k views

Why do we use RGB instead of wavelengths to represent colours?

As we know, the colour of a particular beam of light depends on its frequency (or wavelength). Also, isn't that the information which is first captured by digital cameras? Then, why do we use formats ...
38
votes
12answers
13k views

Are equipment reviews from websites like kenrockwell.com and bythom.com reliable?

I know that nothing helps more when buying a lens to test it out yourself, but getting more than one perspective is also helpful. In particular, I run into Kenrockwell.com a lot when trying to get ...
30
votes
10answers
10k views

Is there a black and white physical filter?

I am wondering if there is a physical filter that would allow a camera to make black and white pictures without using any software effect/filtering?
11
votes
5answers
11k views

Given an image how to identify whether it is RAW file or not

I'm a much like beginner level, so pardon me if this is a very basic silly question. Once I've a JPEG photograph image file, how can I find out whether it is a RAW file or not?
25
votes
4answers
15k views

What are the pros and cons of different Bayer demosaicing algorithms?

Bayer sensors use a pattern of red, green, and blue pixels, and merge those together into a final color image, with one pixel for every single color sensor. This could be done through a "naive" ...
10
votes
2answers
3k views

Why is it that when the green channel clips, it turns into blue?

I was taking photos of snow sculptures at night, and I noticed something strange on my Olympus O-MD E-M10 Mark II. This green lit sculpture when the green channel gets blown, turns blue ...
12
votes
3answers
1k views

Why is my camera drawing labyrinths on my photos?

On the photos where the lens flare is present, my Nikon D7000 is drawing strange labyrinth-looking artifacts. Here's an example. The first image is a screenshot of a little part of the original photo ...
10
votes
5answers
2k views

What *exactly* is white balance?

When setting a white balance configuration, we adjust the temperature and green-magenta shift to a wavelength-intensity distribution of light that correlates most closely with the actual distribution ...
13
votes
2answers
2k views

Why does the histogram of an image depends on the software that opened it?

If I open a raw image in Photoshop and Paintshop pro their histograms and their look is different. However, if I open a Jpeg image in both Software, then their histogram and look is the same. What ...
11
votes
3answers
2k views

Why can software correct white balance more accurately for RAW files than it can with JPEGs?

Why are post-processing JPEG white balance corrections not as accurate as white balance with Raw? My understanding is that when shooting jpeg the camera internally does the following steps: Convert ...
1
vote
3answers
4k views

How sharp are RAW photos before processing?

Are RAW images by nature slightly blurry prior to processing? If I open them up in Lightroom and zoom into the photo, my photos are not tack sharp but a bit blurry. Once I process, it comes out ...
7
votes
4answers
625 views

Can we improve phone cameras using separate sensors for each of RGB?

So I was reading all about the multi camera system on the new Huawei P20 Pro which really got me thinking about how we can use multiple cameras to improve image quality, especially in such a compact ...
4
votes
5answers
7k views

What is difference between 8bit RGB and 16bit RGB?

Most of time when I open any images to Photoshop, it shows 8bit RGB format, but I have also seen 16bit RGB. As a trial, I copied one image and pasted it into a 16bit RGB blank image, but I didn't get ...
5
votes
3answers
3k views

Can all colors be described with RGB?

If one could pick ideal sensitivities for the RGB filters of a camera sensor, would it be possible to capture any color as humans see it?
2
votes
5answers
2k views

How do I find the right white balance value to set in my camera?

As I understand White Balancing means - making a particular color look as it should have been irrespective of what color the Ambient Light is. i.e A white paper must look white not blueish grey(cool) ...
10
votes
1answer
664 views

Are paler raw images normal for a newer sensor with higher dynamic range?

I started photography with the Canon EOS M (the very first in the M series). Recently I bought the Canon EOS M6 and of course now I try to compare the two image quality wise. To my surprise, although ...
2
votes
4answers
874 views

Do full frame sensors have a higher exposure? [duplicate]

I was reading a piece on the comparison of APS-C to full frame sensors. In this article, it mentioned that full frame sensors can have larger individual "photo sites", and can therefore capture more ...
3
votes
4answers
2k views

Does black and white film have any advantage over black and white effects in digital?

I understand that digital sensors use an RGGB layout for pixels, where 50% of the pixels are green, 25% blue, and 25% red. This means that any particular pixel is sensitive to only one particular ...
0
votes
2answers
701 views

RAW in ACR vs JPG in ACR

Photoshop has now given the facility to open and edit JPEGs and other non-RAW file formats using Adobe Camera Raw. One doesn't have to shoot RAWs to do some heavy edits. So is there still any benefit ...
1
vote
2answers
2k views

Why does the quality of photos shot in RAW change after a few seconds when viewing them on a computer?

I have been taking a photo class for the past month or so and the professor told us to shoot in raw for a few assignments. When I view the pictures shot in RAW (on a canon rebel t7) on my computer, ...
1
vote
1answer
3k views

Opening NEF files on windows initially open fine but then change contrast

I have a strange issue with Windows 10 When I open .nef files they load fine. However after a second or two the contrast changes noticeably. I tried Windows 10 Photos and Picasa Image Viewer. What ...
5
votes
2answers
941 views

6500k calibrated monittor - what are the RGB values to represent a given monochromatic radiation of known wavelength?

Say I've calibrated a monitor to the standard 6500k 2.2 gamma, and the color space is sRGB. On this monitor, I would like to have a reasonably accurate representation of a monochromatic radiation (...
1
vote
2answers
3k views

How to set up correct color profile in Windows?

My question is how to set up color management at all levels? There are five levels that I know of. Correct me if anything of this is wrong. The monitor LEDs. It should be calibrated at the factory ...
1
vote
2answers
1k views

How many autofocus points in iPhone 6 camera

I have seen that high-end SLR camera tout the number of autofocus points they have. How many AF points does the iPhone 6 camera have? I have not seen any discussion on it except for "focus pixels".
2
votes
3answers
3k views

Why does NEF file get washed out/highlights while my JPG look normal? [duplicate]

TLDR. is just the title. I know nothing about photography, sorry. My dad has a d90 he never uses, so I use it to take photos when I need them for something. Anyways, I put it on raw mode. when I ...

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