![]() ![]() Screen stretch window allows you to view the image with more contrast than it actually has. Think of it like magnification in the dimension of contrast rather than height or width.įigure 12.2. That is, the contrast on the screen is much higher than in the image file, and you see only a portion of the image's brightness range (hence the term "stretch"). The key idea is that you view the image with much more contrast than the image actually has. MaxDSLR (and Nebulosity) will mystify you if you don't know about screen stretch. Good software automates much of the process. The path to a high-quality digital image from raw image files and dark frames. Photoshop or other general-purpose photo editorįigure 12.1. The unadjusted image may look very dark until the next step. You can also include flat fields at the same step as dark frames. one or more (identical) dark frames, which are exposures taken with the lenscap on, matching the original exposures in duration and ISO setting, with the camera at the same or a slightly lower temperature (lower because it is better to undercorrect than overcorrect).one or more (identical) exposures of a deep-sky object, taken with the camera set to raw mode with long-exposure noise reduction turned off.Regardless of what software you're using, reading this procedure will help you understand what is to be done. (They are alike except that MaxIm DL offers more features.) The overall workflow in Nebulosity is similar, although the details are different. In what follows, I'll tell you exactly how processing is done with MaxDSLR and MaxIm DL, using the versions that were current at the time this book was written. ![]()
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