No star reflections appear in the water when stacking star trails with Nebulb
Cuando realizas un apilado de star trails en Nebulb tienes dos opciones para la representación de la parte del suelo:
- Sigma-clipping
- Maximum
Well, if you select the sigma-clipping option for the ground, the stars will not appear reflected in the water (neither the stars, nor the moon, nor anything that passes through the sky and is reflected in the water).
This is because sigma-clipping stacking is very effective at removing moving objects, so that reflections of stars or the moon on the water (which move over time) also disappear in sigma-clipping stacking, as you can see in the image below:
That said, it is very easy to make the final image show the reflections in the water (you just have to select the maximum image for the ground), as you can see in the following image:
Both images have been obtained by Nebulb during the same stacking, the only difference between them is the image selected for the ground (Sigma-clipping or Maximum).
Another use case in which it is often interesting to use the maximum image for the ground is when there are trees that allow glimpses of the stars between their branches. In these cases the maximum image for the ground usually gives a touch of greater realism to the final image, since the trails of stars have continuity between the branches of the trees (something that is not achieved by selecting the sigma-clipping image for the ground).
Anyway, the best thing to do is always to try both options and choose the one that looks best in each case (it is very easy and quick to do).
Related Articles
I get very white star trails in a star trails image
To make the star trail images look as colorful as possible, I recommend 3 things: 1. Set appropriate capture parameters so that the stars are not too burned out and keep enough of their color. I usually use an ISO 800 (or even lower) and close the ...Not all buttons appear in the upper toolbar
The reason why not all the buttons that you see in the documentation or in the Nebulb video tutorials appear is because of the screen resolution. In order to make all the buttons in the top toolbar show up you can hide or resize the side tool panels. ...In the case of captures taken over many hours with a star tracker, is it necessary to correct the orientation of the images before stacking so that they are all oriented in the same way?
In principle you don't have to flip any image (and even less if you stack in RAW). Nebulb always performs stacking with all images oriented in the same way. This is something that Nebulb manages internally based on the information of the images and ...Does Nebulb work for processing deep space objects?
Nebulb is a software specially designed for landscape astrophotography, taking into account both the type of equipment usually used by night photographers (short/medium focal length lenses and unmodified cameras), as well as the main types of ...Why can meteors appear ahead of some element on the ground?
It may seem curious that Nebulb can render meteors (or any other flying object) in front of something on the ground (like a tree or a tower, for example), but it has a very simple explanation. The issue is related to the fact that Nebulb calculates ...