Thursday, 13 December 2018 12:12

M45, Color camera version

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A clear evening presented a chance to try out a recently acquired one shot color camera. The distinctive and well placed and one of my personal favorite objects,  M45 was selected. The camera used was the ZWO ASI071MC Pro. A 16 megapixel camera with a 4944x3284 pixel array with a relative large pixel size of 4.78, it gives a large field of view with the ED80cft scope. A OSC camera is similar to a dlsr camera, and this sensor is used in some Nikon cameras. A bayer matrix is placed over the sensor, which are tiny color filters, so that each 2x2 cell has 1 red, 2 green and 1 blue pixel from which the color image is created. With my standard monochrome cameras, an external filter is placed in front of the camera and exposures are made through each of the different colored filters. A mono camera tends to be more efficient as all the pixels are recording the same color vs 1 or two with an OSC camera. In addition the mono camera is more flexible in that using filters that pass a narrow band of light that can be used to create what is referred to as narrow band images that highlight certain prominent spectrum, such as the hydrogen alpha emission from ionized hydrogen that is often visible in nebula. What the OSC camera does offer is convenience, the ability to acquire all the colors in one image. Especially useful for faster changing objects where successive images through different filters would show movement or smearing.

This image was taken over two evenings using 120 second exposures.

Additional Info

  • Constellation: Taurus
  • Right Ascension: 03h 47m 24s
  • Declination: +24° 07′ 00"
  • Distance (Lightyears): 444
Read 150 times Last modified on Thursday, 13 December 2018 12:50

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