Flying Bat and Squid HOO

The Flying Bat and Squid Nebulae, captured using duo narrowband filters that restrict the light getting to the camera sensor to the narrow wavelengths of Hydrog...
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The Flying Bat and Squid Nebulae, captured using duo narrowband filters that restrict the light getting to the camera sensor to the narrow wavelengths of Hydrogen alpha (Ha), which is red, and double-ionized Oxygen (OIII) which is blue-green. These are very dim (the Flying Bat Nebula) and extremely dim (the Squid Nebula) emission nebula. This image represents approximately 16 hours of exposure time for each of the Ha and OIII wavelengths. It was produced using the HOO palette, where the Ha is used for the red channel and the OIII is used for both the green and blue channels in an RGB image. Cameras and telephoto lenses-telescopes were mounted on an Equatorial tracker to follow the stars across the sky, to allow five minute exposures.
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