Imaging recource: Remove comatic aberration from your astro images with this tutorial

    Tyler Sichelski of Lonely Speck has created a helpful video tutorial for removing coma aberration from night sky images in Photoshop. Comatic, or coma, aberration is when point light sources become distorted and take on a comet-like shape. Coma aberration is most common at the edge of the frame at and near a lens' widest aperture. The aberration is caused by the lens not projecting point light sources at the edge of the frame at the same size as it projects point light sources in the center of the frame. For more information on...
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