![]() ![]() Sharpness and will make stars rounder when compared to the well-known AHD and Method developed by its author called ‘Adaptive Airy Disk’ that it is stated ‘will reduce green/magenta cast in your RGB data, will improve The VNG (Variable Number of Gradiants) method used by Siril. Two of the better are said the be the ‘AMAZE’ method used by the Raw Therapee raw conversion program and Method to some quite sophisticated methods. Of deBayering methods ranging for the very fast, but crude, ‘nearest neighbour’ This is usually the first step and there are quite a number It includes two free programs, Siril and Images Plus, a third, either ‘rented or purchased’ program, Astro Pixel Processor and the updated version of Affinity Photo. Here is a further look at the topic comparing the results of stacking the same data with 6 programs. There are two further articles on this topic in the digest: the first is a discussion of the program Sequator and Deep Sky Stacker and the second as to whether it might be worth first converting raw files into Tiff files before using them within an alignment and stacking program. Otherwise use Lightroom’s built in Luminance Smoothing to avoid artifacts.Īnd if you want to learn all of these techniques along with how to shoot Milky Way photos in the first place, please join me for a Milky Way workshop.An article in the author’s Astronomy Digest – If you are looking for the best possible noise reduction for your night sky images and don’t mind doing the extra work, consider stacking. Removes planes, satellites, and other moving objects.Ĭons: requires more care in the field, more processing time and additional programs, and can be trickier to get consistent results. Pros: Produces the cleanest final image by far, with the highest detail and fewest artifacts. Note that you can find easy to follow tutorials for these programs on YouTube. Mac users can find a similar program called Starry Landscape Stacker. In the field I shot 16 exposures back to back and used the PC program Sequator to stack them. Pros: Greatly reduces noise without losing detail.Ĭons: Can create “string” artifacts in the photo. Here I used DxO PureRaw for my AI NR, though I have seen similar results with Topaz DeNoise and Lightroom Denoise as well. Here the method is simply to increase Luminance Smoothing to 50% (I should note that for all of these methods I put Color NR and Color Smoothing at 100).Ĭons: Can smooth out details in your photo and make them look smeary. Now let’s look at each method in more detail so you can choose what’s best for you. I’ve also found it difficult to match the color and exposure perfectly after I’ve created a stacked TIF. The downside is that it’s the most complicated method, and requires you to be extra methodical in the field in order to shoot multiple frames. It creates the cleanest photos, the best star details, and the fewest artifacts. I won’t beat around the bush: image stacking is the clear winner. Summary: Image Stacking is the winner BY FAR Single Exposure, no NR Single Exposure, +50 Luminance Smoothing Single Exposure, AI Noise Reduction 16 Exposures, Stacked Single Exposure, No Noise Reduction Single Exposure, +50 Luminance Smoothing Single Exposure, AI Noise Reduction 16 Exposures Stacked Stacking 16 separate Milky Way shots in Sequator.I evaluated each method by how well it reduced noise while maintaining star detail and minimizing artifacts. In this article I compared three different methods of reducing noise in a Milky Way photo. This leaves many photographers wondering how to obtain a high quality, clean image in their night photos. Shooting dark scenes at short shutter speeds and high ISOs is a proven recipe for grainy images (technically it’s not the ISO itself that’s responsible for the noise, but that’s a whole other topic). Probably the most common image quality issue in night photography is noise. ![]()
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