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Moravian Instruments CCD Cameras
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Cooled CCD cameras for low light imaging in astronomy and microscopy.
Cooled CCD cameras for low light imaging in astronomy and microscopy.

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Martin Myslivec used just two narrow-band filters to capture this stunning image of the Rosette nebula in Monoceros. These filters pass only red light emitted by hydrogen (called Hα line) and blue-green light emitted by oxygen (called OIII line). Because all other light sources are suppressed, fine details in the nebulosity, shining especially in these two colors, are much better visible. We recommend to examine this image in details (the original image is available at http://hvbo.cz/data/uploads/galerie/mlhoviny/Rosette_bicolor_full.jpg) – it reveals bright young stars in the center, which intense radiation pushes the gas outwards. Interstellar matter then forms trunks and walls, which can be seen as silhouettes on the bright background. New stars can possibly form within the chunks of gas.

Martin used his G3-16200 camera on the 30cm, f/3.8 astrograph. Total exposure time needed to capture this image exceeded 18 hours.
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M77 in the constellation Cetus is a nice example of barred spiral galaxy, luckily oriented that we can see it almost directly from the direction of its rotation axis. As opposite to normal spiral galaxies, spiral arms do not originate in the galaxy central bulge. A straight bar of stars extends from the bulge instead, and arms start to develop into a characteristic spiral only from the end of the bar.

This deep and sharp image of M77, acquired by Frédéric Lambert with his G4-16000 camera ASTROSIB RC400 telescope, shows also the very dim outer portion of spiral arms, where spiral form a ring of stars far from the galaxy center. Total exposure time exceeds 16 hours.
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Orion constellation is maybe easiest to recognize due to three bright stars in line, creating Orion belt. But it is also famous for Great Orion Nebula – a huge gaseous cloud so bright, that it can be spotted by naked eye. Another famous Horse Head dark nebula, visible as silhouette on the red background, also belongs to Orion. No wonder another Orion nebulosity complex M78 is a little overlooked with such famous neighbors.

Still, the M78 offer a beautiful combination of blue nebulae, reflecting the light of young bright stars, on the dark red background created by emissions from ionized hydrogen. Dense portions of the nebula, not illuminated from the side of our view, create dark silhouettes. Thank to Martin Myslivec, who captured this incredibly deep and detailed image of M78 with his G3-16200 camera on custom 30cm Newtonian astrograph. Total exposure time was 39 hours.
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SIPS version 3.6 is available for download

http://www.gxccd.com/art?id=514&lang=409
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NGC7635 “Bubble” nebula in Cassiopeia is probably the most famous example of a spherical hole in the interstellar material shaped by a stellar wind. This wind originates in young, hot star close to the bubble center. Long exposure astrophotography is necessary to show the nebula spherical shape and some neighboring details, but very long exposure through narrow-band filters is necessary to reveal whole complexity of the surrounding gaseous structures.

This beautiful image was captured by Frédéric Lambert with his G4-16000 on CCA250 telescope. Total exposure time exceeded 35 hours.
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The same NGC 6188 and NGC6164 as shown on the previous post, captured by the same team (www.cielaustral.com) with the same camera (G4-16000) on the same telescope (TEC160), but in real RGB colors now. Total exposure time is much shorter compared to narrow-band image, only 7 hours. Still the details are incredible. We again recommend to visit the authors’ web site to download the image in full resolution.
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Laurent Bourgon, Jean-Claude Canonne, Nicolas Outters, Philippe Bernhard and Didier Chaplain brought us another wonder of the southern skies and again in unprecedented details, depth and clarity. This time they captured NGC 6188 and NGC6164 nebulae in narrow-band SII, Hα and OIII filters. Total exposure time needed to achieve such image quality is 115 hours. Image was captured with G4-16000 camera on the TEC160 refractor.

We recommend to visit authors’ web site http://www.cielaustral.com and examine this image in full resolution – it is definitely worth the effort as details are breathtaking.
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This beautiful image of the IC 5146 nebula, called “Cocoon”, was captured by Michele Trungadi with G2-4000 camera on 10” GSO RC telescope with 0.75x focal reducer. Despite the total exposure time is only 5 hours, the image shows bright red emission part of the nebula, bluish reflection nebulae and hints of dark nebulae, visible only thank to ambient light of stars belonging to our Galaxy.
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The M51 galaxy nickname is “Whirlpool”. While a small telescope shows two fuzzy spots close to each other (the M51 in fact consists of two interacting galaxies – NGC5194 and NGC5195), large telescope and good observing conditions reveal hints of spiral arms. But more than 25 hours of total exposure time through Red, Green, Blue and Hα filters, taken with G4-16000 camera on 50cm MDK telescope with 340cm focal length, shows the Whirlpool galaxy in incredible details. Image was acquired and processed by Laurent Bourgon, Jean-Claude Canonne, Nicolas Outters, Philippe Bernhard and Didier Chaplain (web site http://www.cielboreal.com/).
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