Join Seán Duggan for an in-depth discussion in this video Exposure stacking to create star trails, part of Enhancing Night and Low-Light Photos with Photoshop.
…As the earth rotates,…it creates the appearance that the stars are moving across the sky.…Actually, the stars are moving, as are all of the objects in the night sky,…but the familiar motion of the stars that you've probably seen in time lapse…sequences is really caused by the rotation of the little blue dot that we call home.…In order to capture star trails in a single shot,…you'd have to leave the camera shutter open for a very long time, many minutes or…even several hours depending on how long you wanted the trails to be.…
This can cause the sensor to get hot, which might lead to noise issues.…A much easier way is to take a series of shorter exposures and…then combine them using a technique known as exposure stacking, or layer stacking.…Let's take a journey to the stars and check this out.…So in this folder, there are 50 images.…And what we're going to do is open them up into Photoshop as layers in…a single document, and create an effect so we have the look of star trails.…Now these pictures are each 30 seconds in length, and…
In this course, photographer and educator Seán Duggan explores a range of post-processing techniques aimed at expanding your creative options for night and low-light photography—and even "shooting" stars. He'll begin in Camera Raw for general enhancements (white balance, tonal and contrast adjustments, and noise reduction) and then turn to Photoshop to capitalize on its Merge to HDR feature, which can create spectacular high-dynamic-range images. Last, he includes techniques specifically for star photography: stacking layers to create star trails, removing and replacing blurry stars, and using luminosity masks on photos of the Milky Way.
- Using neutral guides to set white balance
- Applying lens profile corrections
- Reducing noise
- Working with 16-bit and 32-bit HDR images
- Stacking layers and combining exposures
- Improving star photography