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When I talk about an unfamiliar processing construct such as a mask, I ask people to consider the simplest element of an image--a pixel. A pixel has two attributes: color [...]

No other processing step is so fraught with pitfalls as the decision of how bright to make a luminance image before adding color. One thing is certain: If you impulsively [...]

In my previous column, I explained a method that generally produces vivid LRGB images in a consistent way. And even before I finished writing that tutorial, I could already hear [...]

Last column, I discussed the 'Lighten' and 'Darken' blending modes in Photoshop, which you can use as an effect on an underlying layer. However, there are more powerful methods of [...]

BLACK AND BLUE Although reflection nebula NGC 2185 (the large blue region left of center) appears robust, it took 24 hours of exposures through a 32-inch telescope to create this image. POLAR STAR TRAILS A 16mm lens aimed through Delicate Arch at Arches National Park in Utah captured ninety-eight 30-second exposures to produce this stunning portrait. Please include the date and location of the image and complete photo data: telescope, camera, filters, and exposures. [Extracted from the article]

Several photographs related to astronomy including the progression of total solar eclipse of 2016, the flocculent spiral galaxy NGC 3675 and Medusa Nebula (Abell 21), are presented.

The Rosette Nebula in Monoceros is a complex of glowing hydrogen gas with fine threads of obscuring dust that help define the petals of its namesake. When photographed with wide-angle [...]

Though often neglected by amateurs, Camelopardalis contains a number of faint but beautiful nebulae within its borders. Two such gems, Van den Bergh 14 and 15, surround the 4th-magnitude stars [...]

Possibly the most colorful region in the night sky, this area spanning the border of Ophiuchus and Scorpius is rich with gas and dust in many visible forms. At top [...]

GLIDING GULL The Seagull Nebula occupies the top half of this two-image mosaic, with its glowing head (emission nebula NGC 2327) and graceful wings (which are part of IC 2177). WINTER WONDERLAND Orion and the Milky Way tower above the landscape of the Iranian salt desert Dasht-e Lut in this mosaic. Please include the date and location of the image and complete photo data: telescope, camera, filters, and exposures. [Extracted from the article]

The article evaluates the use of Canon EOS 60Da camera with respect to astrophotography.

Photographs of several galaxies, including the Comet Pan-STARRS, Open cluster NGC 6633, and the NGC 4151spiral galaxy, are presented.

Several photographs are presented related to astronomy depicting including the Greenish Comet LINEAR (252P) seen on April 5, 2016; a flash spectrum with different wavelengths during the total solar eclipse seen on March 9, 2016; and Open cluster M46.

The author considers the process of capturing images of Jupiter and the Moon. He admits that capturing an image of Jupiter takes great effort. He addresses two fundamental aspects of making astronomical observations. He presents a histogram of a typical astronomical image. He mentions the advantages of understanding the screen stretch manipulations of the histogram.