Comment faire des photos astro au smartphone ? ASTROTUTO #3

Item: Comment faire des photos astro au smartphone ? ASTROTUTO #3
Rating: 4
Author: PostSingularity Institute

by Ciel & Espace

Applied Sciences & Engineering Arts & Architecture AJTPhotographic equipment and techniques: general AJTFPhotography: subject-specific techniques and principles

🎙 Ciel & Espace 👥 43K 📅 December 29, 2022 ⏱ 13 min 👁 20K 📄 tutorial 🧭 2026-08-26

Available in: English (current) Français

Keywords

astrophotographiesmartphonemode manuelSequatorPhotoshopVoie lactéetraitement d'image

Summary

This tutorial from Ciel & Espace, presented by Jean-Luc and Solène, explains how to capture and process astrophotographs using a smartphone. The video is divided into two main parts: taking photos and processing them. In the first part, Jean-Luc demonstrates the use of a star tracker (Sky-Watcher Star Adventurer) to allow long exposures, and shows how to set up a smartphone’s manual mode: focusing at infinity, setting white balance to daylight, choosing a shutter speed (up to 30 seconds), and selecting an ISO between 1000 and 1600. He emphasizes the importance of taking multiple shots to compensate for the small sensor of a smartphone. In the second part, Solène explains how to use the free software Sequator to stack the images, aligning both the stars and the foreground, and optionally removing satellites or aircraft trails. She then shows how to further enhance the result in Photoshop (or free alternatives like Pixlr or GIMP) using the Camera Raw filter to adjust white balance, exposure, contrast, and vignetting. The video concludes by highlighting the importance of dark skies and recommending to check light pollution maps. The tutorial is practical and accessible, with clear step-by-step instructions.

193 words

Critical Evaluation

Value of the Information & Strength of the Argument

The video provides valuable, actionable information for amateur astrophotographers using smartphones. The presenters explain the reasoning behind each camera setting, such as why manual focus is necessary in the dark and why a moderate ISO is preferable if post-processing is planned. The demonstration of Sequator’s features, including sky region selection and best pixel options, is clear and practical. The argumentation is solid, based on practical experience and standard techniques in astrophotography. The advice to take multiple exposures and stack them is well-justified as a way to compensate for smartphone sensor limitations. The tutorial also offers alternatives to paid software, making it accessible to a wider audience.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is moderate: the video is a tutorial based on the presenters’ expertise, not a peer-reviewed study. However, the techniques shown are standard in amateur astrophotography and are presented accurately. The sources cited in the description include links to the free software Sequator and Pixlr, as well as an article from Ciel & Espace about smartphone astrophotography, which adds credibility. The title accurately reflects the content, and the video is well-structured with clear chapters. The presence of a sponsor is disclosed, and the promotional code is clearly marked, which does not undermine the tutorial’s integrity.

218 words

Title / Content Match

The title accurately reflects the content: the video demonstrates how to take astrophotographs with a smartphone and how to process them with software.

Quality & Reliability

7/10

The video provides practical, hands-on guidance for smartphone astrophotography, with clear explanations of camera settings and post-processing steps. The advice is consistent with common practices in amateur astrophotography. The presence of a sponsor and promotional code is disclosed, but does not affect the technical content. The tutorial is based on the presenters' experience and does not cite external scientific sources, but the methods are standard and reproducible.

Chapters

Cited Sources

Sequator - Free astrophotography stacking software — Mentioned in the video as the recommended free software for stacking multiple astrophotography images.
Pixlr E - Free online photo editor — Mentioned as a free alternative to Photoshop for image processing.
Test du Huawei P50 Pro : un smartphone capable de dévoiler la Voie lactée — Referenced in the video as an article providing advice on choosing a smartphone for astrophotography.

Concurring Sources

Sequator - Free astrophotography stacking software — The software is widely recommended in online astrophotography communities for stacking images.
Pixlr E - Free online photo editor — Pixlr is a well-known free alternative to Photoshop, often used for basic image editing.

Contribution & Novelties

This video provides a practical, step-by-step guide to smartphone astrophotography, covering both capture and post-processing. It demystifies the process and shows that impressive results are achievable with a smartphone and free software. The tutorial’s originality lies in its clear explanation of using Sequator to align both stars and foreground, and the integration with Photoshop for fine-tuning.

Pour aller plus loin :

Astrophotography on Wikipedia — Provides an overview of the field and techniques.
Long-exposure photography on Wikipedia — Explains the principles behind long exposures, relevant to the tutorial.
Light pollution on Wikipedia — Discusses the impact of light pollution on astrophotography, as mentioned in the video.

106 words

Radar Profile

The radar profile shows balanced scores across information quantity, quality, technical level, and reliability, with a slight emphasis on practical applicability. The video excels in providing actionable information and clear demonstrations, while maintaining a moderate technical depth suitable for beginners.

Reliability 7/10

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