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6 votes

How much ISO noise is removable in post?

The moon is really a special case, because it is mostly grey. So you can remove chroma noise by just picking a channel (green, usually). This also removes some of the chromatic aberrations on the ...
xenoid's user avatar
  • 21.4k
5 votes

Issues with dark frame subtraction: Dark frames adding "noise" and changing image color/tint

You misunderstand the purpose of dark-frame-subtraction. While it is a technique used to reduce noise, it only reduces noise that is consistently output from the sensor. Any read noise due to the ...
Itai's user avatar
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4 votes
Accepted

Filter for denoising of an old document scan

The quickest way I have found to do this is via Luminosity Masks. First REMOVE COLOUR from the image. INCREASE BLACKS SPOT HEAL dark areas of image not Required. Create a CURVE Adjustment Layer ...
Abdul N Quraishi's user avatar
4 votes
Accepted

How much ISO noise is removable in post?

Diffraction and noise You basically used a 3000mm f/30 lens, so heavy diffraction is expected. You simply cannot obtain sharp results with this lens and teleconverter, even if you manage to focus the ...
Eric Duminil's user avatar
  • 2,273
4 votes

Are there Lightroom plugins for noise reduction which work on RAW data?

It sounds like you want to use an alternate noise reduction algorithm integrated into Lightroom's RAW conversion, as an alternate for or addition to the built-in noise reduction. I don't think there ...
mattdm's user avatar
  • 143k
3 votes

Where does this noise come from and how to get rid of it

My guess is you're using denoise (profiled). If so, then you should read darktable's manual section on profiled denoise. At the time of my original reply the recommendation was to use 2 instances of ...
Alessandro Amato del Monte's user avatar
3 votes

Where does this noise come from and how to get rid of it

Many of darktable's algorithms are significantly different from those typically used by other image processing programs. If you cannot get the results you want from darktable, consider trying other ...
xiota's user avatar
  • 27k
2 votes

The best setting for Canon 70D for my application

scottbb has more than adequately covered the pure photography side of things, so I'd like to add another aspect. Bouncing a camera repeatedly over a bumpy field on a hard mount & expecting it to ...
Tetsujin's user avatar
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2 votes
Accepted

The best setting for Canon 70D for my application

While the actual questions you asked aren't very broad in scope ("should I use Av/Tv/Manual mode?", and "Is the 18-55 STM lens useful for my application?"), I think the details of ...
scottbb's user avatar
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2 votes
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How to set focus when subject is more than one object?

Which is the main subject in these cases? Which did you, the photographer, mean to be the main subject? You need to decide what you're trying to say with your photo and ensure that the photo ...
Philip Kendall's user avatar
2 votes

How much ISO noise is removable in post?

Here is my process in RawTherapee: We start in the Raw tab. The first thing I notice is that you have horizontal banding. RawTherapee can deal with this using the "Line noise filter". Set the ...
Davidmh's user avatar
  • 121
2 votes

How much ISO noise is removable in post?

In general you can always remove noise, but you might not have much detail left in your image if the signal to noise ratio was poor to start with. State of the art these days are filters based on a ...
Peter Cordes's user avatar
2 votes

How much ISO noise is removable in post?

As noted in other answers there, is neither going to be a single fix nor a complete set of fixes. It may be worth seeing what the DXO Photolab prime de-noising algorithm can do; it can be be extremely ...
Adam Gold's user avatar
  • 101
2 votes

Issues with dark frame subtraction: Dark frames adding "noise" and changing image color/tint

Instead of reducing noise, the darkframe subtraction increased the noise- or rather, added some dark/monochrome noise. How long was your session? What was the ambient temperature? Was the camera at ...
Michael C's user avatar
  • 175k
2 votes

How much ISO noise is removable in post?

I think your image would have turned out much better without the 3x teleconverter. With a 18MP or 24MP camera, cropping the image would probably be sharper and you could have used a more reasonable ...
Mike Sowsun's user avatar
  • 12.3k
2 votes

Issues with dark frame subtraction: Dark frames adding "noise" and changing image color/tint

A while back I tried some of these images and found that it was much more convenient to take a dark frame for a group of long exposures rather than sit and wait for a minute every time I took a minute ...
dmkonlinux's user avatar
  • 1,003
1 vote

Issues with dark frame subtraction: Dark frames adding "noise" and changing image color/tint

Try turning on in-camera darkframe subtraction instead. The designers of the camera have insight into how to best mitigate noise because they have detailed knowledge of the sensor and the noise ...
Bob Macaroni McStevens's user avatar
1 vote

How much ISO noise is removable in post?

Focal length is not everything. You made a mistake by using 3000mm focal length. The truth is, 400mm is plenty. I took this picture of the moon with a 400mm lens: If you use a longer focal length, ...
juhist's user avatar
  • 6,760
1 vote

How much ISO noise is removable in post?

A lot of noise can be removed. I used unprocessing to denoise it, which is probably an overkill approach for this. If additional sharpening was applied, maybe this image could be passable. It is ...
Atnas's user avatar
  • 278
1 vote

How much ISO noise is removable in post?

The ISO noise isn't the problem, it's shaking. There's definitely ISO noise but the shaking means that you can't clean it up. You can photoshop an image out of this pic but it won't be the real thing. ...
moot's user avatar
  • 629
1 vote
Accepted

How Does Noise Reduction Work In Canon EOS 1300D?

The classical solution for edge-preserving noise reduction is to apply a bilateral filter: https://en.wikipedia.org/wiki/Bilateral_filter . This calculates the average of a group of pixels in the ...
Jeroen van Duyn's user avatar
1 vote

Where does this noise come from and how to get rid of it

By curiosity, I tried the state of the art denoiser BM3D [0] on the very first image from the OP; I used as parameters a putative white noise with variance of 0.0012, and find the result excellent: ...
Soleil's user avatar
  • 821
1 vote

Coolpix P900 artifacts

The blur is due to heat haze. I have had this exact same issue happen when taking pictures of birds on lakes. Just this winter I had the same issue when taking photos of snow geese. The only way I've ...
Chris Stillwell's user avatar
1 vote

Noise & Blue Speck in A Priority Nikon D5200

Yes, you will get noisier images at higher ISO numbers, and the blue specs are also noise. The best ISO for an indoor shot depends pretty much on the available light and subject. For a still life, if ...
DocPixel's user avatar
  • 132
1 vote
Accepted

Noise & Blue Speck in A Priority Nikon D5200

The blue specks are read noise that is being amplified when you try to pull details out of shadows that are pretty much pure black. Noise is a result of low signal-to-noise ratio (SNR). In the case ...
Michael C's user avatar
  • 175k

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