This is an early test image of M42 (Orion nebula) from T17 in Spain, showing the potential of this telescope with its extended far red FLI CCD. What is remarkable is the unique filter combination used.
The picture was created from data taken through narrow-band filters centered on the Sulfur II (blue) and the [Sulfur III] 9532A emission lines (green), and a narrowband filter which includes emission from Helium II at 10124 A (red). The background stars show clearly in the one micron image. These stars are normally dimmed by foreground dust at shorter wavelengths and are not seen in a standard `true color' image.
Rather impressive for a modestly sized iTelescope! Compare the image to one taken from a multi-million dollar 8.2-meter telescope of the Dumbbell Nebula. (inset right)
Exposures: 5x (HeII:300secs:SII:60secs:SIII:60secs) Target < 35deg from horizon