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What is ISO, Dual ISO, ISO invariance and where does all the noise come from?

May 11, 2023 by John Aldred Add Comment
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ISO used to be fairly simple. In the film days, it was called ASA and was a measure of the sensitivity of that film to light. As we transitioned to digital and the years progressed, things have gotten a little more complex. In this video, the Syrp Lab team looks at ISO in the modern day. They take a look at features like Dual native ISO as well as discuss the issues around digital noise.

The video focuses on how ISO relates to video, as many modern ISO features are specifically designed for getting the best possible quality in your footage. But much of the information is still valid for photographers shooting still images, whether they be jpg or raw.

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Why shooting portraits at ISO 100 may not always be the best choice

Sep 5, 2019 by Dunja Djudjic 21 Comments
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Increasing the ISO value increases the amount of noise in your images. So, you may want to shoot at the lowest ISO possible. But is it a good idea to shoot at ISO 100 whenever you can? Michael Sasser believes it isn’t always the best choice, and in this video, he gives you his reasons why. Let’s see if you agree.

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Nvidia trains AI to remove noise and watermarks by looking only at corrupted photos

Jul 10, 2018 by Dunja Djudjic 2 Comments
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There are different ways to remove or reduce noise, and there are also ways of removing watermarks from images. But Nvidia has recently introduced a deep learning-based approach which has learned to fix photos by looking only at corrupted photos.

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Use this simple Photoshop technique to shoot in the dark and effectively reduce noise

Feb 23, 2018 by Dunja Djudjic 16 Comments
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Modern and high-end cameras can shoot without significant noise even at very high ISO values. But many of us still don’t own such cameras, so the ISO value where the photos are still usable is pretty limited. Koldunov Brothers share a simple Photoshop technique that will let you shoot In the dark even with a smartphone and reduce noise effectively.

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The Sony A7II and its absurd shadow recovery.

Oct 16, 2016 by Joseph Parry 44 Comments
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Until today I’d known my Sony A7II could handle the shadow world, but I could never bring myself to push it. Mainly out of fear, no actually entirely from fear of losing the image. Recently I had the absolute pleasure of working at Rebecca Bathory’s place I decided to test the range once and for all.

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Which Camera is the Noisiest? This visual database compares sensor noise

Jul 10, 2016 by Udi Tirosh 7 Comments
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The quality of long exposures is determined mostly by the amount of noise a camera produces. The lower the noise levels, the better the exposure. This is especially true if you are shooting lots of nightscapes or night skies, where most of the photo is black.

And Brendan Davey shoots a lot of night photos, in fact he shoots enough of them that it was worth a while for him to create a database which compares the amounts of noise each camera (or camera sensor) produces.

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The Pentax K-1’s Pixel Shift challenges the dynamic range of medium format

May 10, 2016 by John Aldred Add Comment
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It’s clear that the Pentax K-1 is out to impress and if the sharpness increase with its Pixel Shift technology weren’t enough for you already, the dynamic range boost it provides will definitely do the trick.

DPReview have had the K-1 for a little while now, running it through a battery of tests, and in the current round they put the dynamic range to task, reporting that it challenges that of medium format cameras.

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How to reduce noise in an image without losing detail

Mar 10, 2016 by Gannon Burgett Add Comment
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With each passing year, cameras are getting better and better at keeping digital noise to a minimum. Despite this, there are still times when you need to shoot at a high ISO and will inevitably end up with an amount of noise you aren’t pleased with.

Thankfully, this can be fixed in post production. The tradeoff though, is usually that details are lost in the image due to the smoothing of the noise.

To help show you how to reduce noise without compromising on the details of photographs, photographer Jimmy McIntyre has shared a helpful YouTube tutorial.[Read More…]

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Sony A7r II Noise Comparison And Rolling Shutter Test

Aug 1, 2015 by Tiffany Mueller 4 Comments
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We’re starting to see more and more sample footage from the much anticipated Sony A7R ii, which is due to start shipping August 5th. U.K. based photographer, Jon Roberts, recently got his hands on one of the cameras and was nice enough to whip up this noise test, which compares the A7R II to it’s predecessor the A7R and, also, a Canon 5D MKiii. Roberts’ notes “that this wasn’t a very scientific test under lab circumstances…more of a rough and ready preview!”; however, it’s still a solid comparison with 100% crops.

The same goes for the rolling shutter test video Roberts has shared with us, which you’ll see farther down in this post along with an unboxing video–but, we’ll get to those in a minute.

First, take a look at the noise test. You can click the image to open a full size version in a new browser windor, or take a look at it over on Flickr.[Read More…]

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DeNoising Vidoe: Neat Video vs. Denoiser II

Oct 6, 2014 by Udi Tirosh Add Comment
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When it comes to noise in photos, we are pretty accustomed to using DeNoising tools. When it comes to video, there are similar options that apply that same logic to footage, rather than to a single frame.

The folks over at Film Riot took two of the more popular options, Neat Video and Denoiser II (both at about $100) for a test drive and compare the results. Ryan talks about a third plugin called Dark Energy which he says surpasses them both, but sadly, it fell of the comparison for costing $100 more.

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Udi Tirosh: from diyphotography.netUdi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

Alex Baker: from diyphotography.netAlex Baker is a portrait and lifestyle driven photographer based in Valencia, Spain. She works on a range of projects from commercial to fine art and has had work featured in publications such as The Daily Mail, Conde Nast Traveller and El Mundo, and has exhibited work across Europe

David Williams: from diyphotography.netDave Williams is an accomplished travel photographer, writer, and best-selling author from the UK. He is also a photography educator and published Aurora expert. Dave has traveled extensively in recent years, capturing stunning images from around the world in a modified van. His work has been featured in various publications and he has worked with notable brands such as Skoda, EE, Boeing, Huawei, Microsoft, BMW, Conde Nast, Electronic Arts, Discovery, BBC, The Guardian, ESPN, NBC, and many others.

John Aldred: from diyphotography.netJohn Aldred is a photographer with over 20 years of experience in the portrait and commercial worlds. He is based in Scotland and has been an early adopter - and occasional beta tester - of almost every digital imaging technology in that time. As well as his creative visual work, John uses 3D printing, electronics and programming to create his own photography and filmmaking tools and consults for a number of brands across the industry.

Dunja Djudjic: from diyphotography.netDunja Djudjic is a multi-talented artist based in Novi Sad, Serbia. With 15 years of experience as a photographer, she specializes in capturing the beauty of nature, travel, and fine art. In addition to her photography, Dunja also expresses her creativity through writing, embroidery, and jewelry making.

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