Image 1 of 1
M45 Pleiades and NGC 1499 California Nebula (135mm 5DII).jpg
The Pleiades in Taurus, and the California Nebula, NGC 1499, in Perseus. The small blue reflection nebula at centre right is IC 348. This is a stack of 5 x 6 minute exposures with the 135mm Canon L-Series lens at f/2.8 and Canon 5D MkII at ISO 800. From home on a clear winter's night. Original exposures were technically overexposed but processed up well with huge increases in contrast introduced at every stage, from RAW to layered Photoshop, to final flattened TIFF. Several masks employed to equallize (flatten) the brightness gradients across the image from radial lens vignetting, linear edge camera lens box shadowing, and linear sky gradients. But having originals that were overexposed provided lots of signal, despite having only 5 exposures median combined, allowing the very faint nebulas to be brought out without significant noise. Having a cold (-5°C) camera helped too.