DSLR astrophotographers must strike a delicate balance between ISO sensitivity, aperture, focal length, and exposure time every time they take a shot. The greatest single factor influencing all of these variables is the rotation of the earth. The iOptron SkyTracker attempts to relax these variables by cancelling out Earth’s rotation. Is it worth the price?
In past tutorials, we’ve discussed planning imaging sessions, taking into account the weather and positioning of celestial objects. We’ve talked about how to properly expose the sky while avoiding star trailing. What we haven’t talked about yet is the other half of a nightscape; the foreground. In this tutorial, I share six techniques I’ve learned over the last couple of years that you can use to ensure your foregrounds compliment the starry skies in your images.