StarrySkyVideo vs StarryCamera2

This app is an ultra high sensitivity video application and can take pictures of the trajectories of stars moving in the night sky. Each frame of video is created as a bright image created by comparative brightness synthesis of up to 10 images. (Comparative brightness synthesis is a standard technique for taking beautiful starry sky photographs.) You can take video of the starry sky for a long time (5 minutes to 5 hours) and take pictures of the stars moving around the North Star along with the rotation of the earth. This is not just time lapse. Since it takes pictures with ultra-high sensitivity one by one, it takes video brightly even in the dark night. (Because shooting with compressed time, it will be fast-forwarded.) We recommend that fix the smartphone with a tripod etc. · Brightness: From brightness in the daytime, brightness suitable for night view, and even brightness to capture the starry sky can be specified continuously. · Recording time: It can be specified consecutively from minimum 5 minutes to 300 minutes (5 hours). · The time lapse interval (shutter interval) is automatically set and displayed from the brightness setting value. · The playback speed magnification can be specified continuously from 10 times to 300 times. The larger the magnification, the less the playback time. · Frame rate and playback time at playback are automatically calculated and displayed. If you cancel while photographing, it saves the video taken until then. Still images are saved at intervals of 10 frames of video.

This camera app is designed to help you take beautiful photos of the stars with your iPhone. Why not try shooting star trails with your iPhone? ### How to Use 1. Go to a location with low temperatures where stars are clearly visible. 2. Secure your iPhone on a tripod or similar mount (this is the most important step). 3. Select a shooting mode. 4. Adjust brightness using shutter speed and ISO sensitivity. 5. Press the shutter button. ### Mode Features Starry Sky: Makes bright stars stand out; captures the scene close to how the naked eye sees it. Star Trails: For capturing star trail photos (shooting for 30 minutes creates a distinct star trail effect). Milky Way: For capturing the Milky Way and fine stars with sharp clarity. Night View: For when you want no processing; produces low-noise images. Lighten Composite: Uses lighten compositing (ideal for fireflies, fireworks, light trails, etc.). ### Fine-Tuning Focus 1. Position a bright star (such as a first- or second-magnitude star) in the center of the screen. 2. Press the focus button to zoom in; use the slider for coarse adjustment, then use the stepper controls to find the position where the star appears smallest. 3. If it is difficult to tell, try shooting with different focus positions and compare the results. ### About Star Trail Mode Unlike other modes, Star Trail Mode and Lighten Composite Mode do not allow brightness adjustments via shutter speed; please adjust the brightness using ISO sensitivity instead. To minimize errors, start with a 120-second test shot to adjust settings like ISO sensitivity before proceeding to the actual 1,800- or 3,600-second exposure. The "Starry Sky" mode is suitable for urban astrophotography, as it allows you to capture images in locations where long exposures might otherwise result in an overexposed, washed-out white image. Including statues or monuments in the frame can create impressive, visually striking photos. Using flimsy holders or tripods can cause the star trails to blur, so I recommend using sturdy, high-quality equipment. In "Star Trail" mode, the background is smoothed out via "Lighten Composite" (stacking) processing; this improves the visual quality, even on cameras with small, noise-prone sensors like those found in iPhones. Including the North Star enhances the swirling effect but results in shorter trails. Pointing the camera east (or elsewhere) eliminates the swirling look but produces longer trails. Choose whichever style you prefer. During a meteor shower, a one-hour star trail exposure might capture two or three shooting stars. For "Star Trail" mode, I recommend setting the light duration to "Middle Only." ### About Watermarks The default setting displays the app's name; please customize this with your handle or account name to protect your copyright. ### Recommended Method for Star Trail Photos with Cars 1. Start by selecting the ISO setting one step below the maximum. 2. In the settings, select "Middle Only" for the light duration. 3. Set the light intensity to "Medium" on the shooting screen. 4. Set the shutter speed to 120 seconds and take a few test shots to adjust the ISO sensitivity and light intensity. If the entire image is too bright, lower the ISO sensitivity; if it is too dark, raise it. If the car illuminated by the light is too bright, lower the light intensity; if it is too dark, raise it. 5. Once the ISO and light settings are finalized, set the shutter speed to 1800 seconds for the actual shot. Initially, you can leave the focus at the default setting of 0.0; however, once you get the hang of it, pressing the focus button to ensure precise focusing will result in sharper star trails and higher-quality photos.