Shadowy Daisy

Shadowy Daisy
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Image perturbation caused by electronic transformation and processing.

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0
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2answers
67 views

How much of digital sensor noise is thermal?

Is all digital sensor noise thermal? And what is the relationship between temperature and noise? For example, as we cooled a CMOS towards absolute zero, would we discover that high-ISO images would ...
0
votes
1answer
56 views

Is there a way to determine a camera's quantum efficiency?

I need to know my camera's quantum efficiency for a research project which involves the usage of a Nikon Coolpix A10. Is there some way to know it?
3
votes
6answers
330 views

Can photos taken with high ISO be fixed?

Please see the the attach photos. Our wedding photographer shot all of our pictures in shutter priority mode and ISO 6400. They are grainy, poor . Is there ANY way to fix them?
-1
votes
2answers
97 views

Why are my photos grainy now when they never used to be? Need help [closed]

All of a sudden my photos are grainy. Never happened before. Need help please. Thank you.
6
votes
6answers
289 views

Why are my sports team pictures fuzzy?

UPDATE: I added the largest jpeg files I could with the original tone, unedited except for a cropping and the change from RAW to jpeg. Thanks for everyone's advice!! This forum is awesome! I use a ...
1
vote
2answers
69 views

Does changing the WB in post-processing affect noise?

I have a friend who took some macro photos of snowflakes with the WB preset to "Cloudy", but lighted from an 11-watt flourescent bulb. Snowflakes look more pleasing with a blue tint, rather than "warm"...
3
votes
0answers
96 views

7D noise levels. Can it get worse with camera age?

I have been using my 7D for 4 years now and never really noticed luminance noise but a couple of recent batches off photos with low ISO and nice bright sunlight conditions are yielding more noise in ...
2
votes
2answers
159 views

Are focus and noise problems I see with my Nikon D80 simply because newer cameras are better?

I can't seem to get photos with good focus or without noise. Is it the fault of the Nikon D80?I have read that cameras only two or three years old have much better light sensors and that that is what ...
3
votes
3answers
1k views

Can I use a single RAW file with stacking to reduce noise?

Can I get the same results by copying a RAW (same exposure) file many times and stacking to reduce noise as I would if I used many separate exposures?
1
vote
1answer
151 views

Will sun damage to a sensor create an unusual amount of noise in images?

Recently I was playing with my Sony α6000 camera, taking some shots of birds in the morning and also the sun. It was after taking the shots that I stumbled upon the fact on the internet that sun ...
2
votes
1answer
78 views

How can I measure noise from the photo?

With higher ISO comes "bigger" noise. Is there a way to measure how much noise does the photo have? Maybe some programs can calculate it?
0
votes
2answers
73 views

Why do exported image contain colored grains/noise when viewed in GNOME Image Viewer?

I was editing a JPG image taken by Nikon D5300, a mid-range DSLR. Original picture was somewhat washed out. After some color-correction, I exported the image both in JPG and PNG format. Original JPG:...
0
votes
2answers
113 views

Should I be worried about the pixelation in my photo? [closed]

I took a photo of a lake and while editing it I found that the image actually had sensors pixel view all over the picture. Is this something I should worry about? Here in my photo, Pixels of the ...
3
votes
3answers
243 views

Why my shot in winter has noise as I have an ISO of 200?

The picture below has noise it was a cloudy day, but light was good. And ISO was set to 200. I couldn't find a good reason in my reflection process to know why noise has emerged and what to do in ...
1
vote
0answers
46 views

Cant the eye see noise [duplicate]

Is the question I've been asking for a while. The reason why I am seeking an answer to this question is because I have Visual Snow http://www.visualsnow.eu/ and I had it since i was 8 and i can't help ...
2
votes
3answers
138 views

What causes noise floor in an image sensor?

In the book Image Sensors and Signal Processing for Digital Still Cameras, it says that Read noise, or noise floor, is defined as noise that comes from the readout electronics.Noise generated in a ...
15
votes
4answers
3k views

Why is there the illusion of detail in photographic noise?

I have the following image which contains noisy mountains. In the lower part of the image, the signal-to-noise ratio is too low to contain actual details, but when I remove all the noise from this ...
0
votes
1answer
95 views

There are many red and black spots in my photos,what are those? [duplicate]

I am using canon 60d for more than 1year.few months ago i suddenly saw these dots were appeared in my photos.i have tried manual sensor cleaning several number of times,but this didn't work for me....
1
vote
2answers
628 views

What are the red, blue, and green dots in my night sky photos? [duplicate]

I recently bought a new telephoto lens for my Nikon D5000. With the new lens I started taking pictures of the moon. When I take the pictures I have blue, red, and other colored dots in the photo, ...
1
vote
1answer
235 views

Why am I getting noise with D3200 even at ISO 200?

I just bought a Nikon D3200. My first DSLR. Am using a 50mm f1.8D Nikkor lens. Now, at ISO 200, I took a few test shots and though the images look fine on the small screen, as soon as I view them on ...
1
vote
2answers
930 views

Why do RAW images in Darktable have a lot of noise?

I installed the latest version of Darktable from the Ubuntu PPA from their homepage (1.6.8). When I import RAW ges from a folder they all seem to have a lot of noise. I opened the exact same images ...
1
vote
0answers
213 views

How can I avoid noise (white dots all over the picture) with GoPro Hero4's nightlapse mode? [closed]

I have been testing my GoPro Hero4 Black's Nightlapse mode to take night sky photos and i am getting a lot of noise (lots of white dots all over the picture). I'm using the Max 30 secs exposure time ...
1
vote
0answers
73 views

Easy prevention of unintended lines after crop in Photoshop cs6?

After cropping and saving for web as jpeg (maximum, optimized, convert to sRGB selected) there are unintended 1px gray lines around the border of my images that have a white background. I've read that ...
8
votes
1answer
328 views

How can an electronic shutter reduce dynamic range?

I read a recent review of a camera which can use either its mechanical shutter or an electronic shutter. The review mentions a problem they noticed with the mechanical shutter, and then notes that the ...
4
votes
1answer
171 views

How do I compare camera signal-to-noise ratio based on camera sample images?

I want to choose a camera with the best signal-to-noise ratio within my budget. I want to ignore producer's marketing BS and reviewer's presumptions that "something's really cool". I know about ...
4
votes
2answers
263 views

Is analog gain really actually power-of-two only?

Context I'm using a Nikon D5200, which features extra ISO values between powers of two, that the Nikon D60 did not offer. D60 offers 100, 200, 400, 800, 1600 (1-stop interval). D5200 offers two ...
0
votes
1answer
200 views

What causes chroma noise in an image sensor

I'm trying to understand what is causing chroma noise in an image sensor, specifically why it is so visible when the ISO is set to a very high value (which for CMOS I guess means that there is an ...
2
votes
4answers
1k views

Sony a7: Is there more noise for ISO <100?

I have a Sony a7 (original). And on the camera it has a feature my old Canon DSLRs never had: it allows me to select ISO values LOWER than 100. I understand the point of these lower ISO values: I ...
2
votes
0answers
343 views

Why does my Canon 24-70mm L Lens appear to produce higher noise/grain than my 50mm f/1.4 in similar environments?

I just purchased a brand new 24-70mm f2.8 II for my upcoming trip. I've been testing out this lens for the past few days, and have noticed something that I'm a bit confused by. It seems by my tests, ...
0
votes
3answers
113 views

Will using a DX lens on an FX Body compromise ISO performance? [duplicate]

In terms of ISO, is the ISO performance compromised? Say I was using a 50mm DX on my FX body, would I have a lower quality ISO performance vs an FX 50mm on my FX body?
11
votes
3answers
2k views

How can I reduce noise at ISO 100 in photos taken in the twilight?

I shoot with a Canon EOS Rebel T5 and sometimes see noise even when shooting at ISO 100. Is this just because there is not enough light in the dark portions of the picture (seen below)? Is this a ...
2
votes
0answers
124 views

Yongnuo YN-468 II — how can I turn off the beeps?

I have a Yongnuo YN-468 II and the beeps while the flash is focusing are annoying. How do I turn them off?
3
votes
1answer
1k views

Why do my photos appear grainy when taken at the widest aperture?

I have a Nikon d5000 and just purchased a Tokina 11-16 lens. I was taking picture of a dog 1-2 meters away during winter at mid day today. Using the aperture priority setting, I set the camera to ISO ...
1
vote
0answers
804 views

Why does an exported JPG image from RawTherapee have much more noise?

Please see the two images below. Any idea why the export output has more noise?
0
votes
3answers
2k views

Do different lenses affect noise level?

I unfortunately got a very poor and cheap 18-55mm lens on my Canon 60D. In addition to poor quality of my photos (poor in comparison with my 50mm f/1.8 Lens which makes great pictures) the noise level ...
2
votes
2answers
338 views

Does it make sense to “Expose to the Right” except at base ISO?

I have read in a number of places that exposing to the right (ETTR) only makes sense at your camera's base ISO, with the justification being that if you are boosting the gain in camera (by raising the ...
3
votes
3answers
592 views

Why is there no image noise in my webcam dark frame photographs?

I'm trying to take some timelapse photos with a webcam. To reduce noise, I'm trying to take a dark frame. However, with the lens covered up totally, there is absolutely no noise in the image. The ...
0
votes
1answer
82 views

In what kinds of images would high noise be most manageable?

In what sort of photographs does the noise least detract from the image? (The noise is that resulting from use of high ISO settings.)
0
votes
2answers
62 views
3
votes
1answer
698 views

Output image of RawTherapee is different

I modified a raw image using rawtherapee which looks like below screenshot in editor. But when I export it (I have tried all options: jpeg,png, best quality etc), the output image is not same. It ...
1
vote
0answers
332 views

Is it normal for the Canon 6D to exhibit more color noise compared to a 50D?

My first day with 6D, upgraded from a 50D. Wouldn't be pixel-peeping but something unusual caught my eye when I opened photos in Lightroom this morning. The color noise pattern is completely different ...
0
votes
1answer
1k views

How to stop Nikon D3200 from shooting everything at ISO 3200 in Auto mode

When I use the Auto mode on my Nikon D3200, it will almost always shoot at ISO 3200, even if I have a potent external flash in place. Because of the quite small pixel size of the camera, it will make ...
1
vote
3answers
501 views

Too much “Grain” in photos [duplicate]

i'm trying to produce a few mockup pictures of a person using a tablet around the house. These are the conditions: Camera Nikon D90, Lens 18-55 The pictures were taken in the morning Indoors but the ...
17
votes
5answers
1k views

Might future advances in sensor technology reduce or eliminate noise?

Is there a possibility that future tech advances may reduce or eliminate the noise when using high ISO setting, or is this noise unavoidable and inherent to all digital sensors? If there is a ...
4
votes
2answers
197 views

Why does raising ISO make image quality appear lower even though my measurements suggest it shouldn't?

I know this may be rehashing one of the most discussed topics, but I would like to take it a slightly different direction and solicit input. First of all, I am familiar with the electrical ...
5
votes
3answers
842 views

Is the megapixel count setting on a P&S digital camera real or a gimmick? [duplicate]

Does downsizing the effective recording megapixel count setting on my P&S digital camera actually decrease the sensor-megapixel density, thereby increasing pixel size and culminating in better ...
-1
votes
5answers
1k views

What's a good software to combine all the frames in a video into a photo?

The goal is to reduce noise. This is on my iPhone 5s, which has bad low-light performance, as you can imagine. So I wanted to see if I could take a video (without the phone moving), and then merge ...
0
votes
6answers
424 views

Is the low-light advantage of larger sensors attributable to the sensor itself or to the larger aperture of the lenses? [closed]

Let's say I take a photo using an APS-C camera and using an FF camera, from the same position, with the same ISO and shutter speed. Let's say I use a 50mm focal length for the FF camera. To match the ...
2
votes
3answers
568 views

Can I get better results from my Panasonic Lumix DMC SZ1 in low light?

I made a very quick decision buying this camera. I was amazed due to its 10x zoom and its amazing image stabilizer. And of course, by its low price. But after getting it delivered and using it in ...
16
votes
2answers
6k views

What is sharpness vs. clarity in photo editing software?

I have been using Lightroom and Photoshop Pro for past 7 months. For all my photos, I used to increase the sharpness using the options available. I now see another option called clarity, and when I ...