The Orion Nebula

M42. The Orion nebula.This image of the Orion nebula reveals a more natural colour composition. I used a ten inch F4.8 reflector, PHD auto guiding and an Atik 383L mono CCD camera. I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The total exposure times were 20 minutes using a red filter, 20 minutes using a green filter, 40 minutes using a blue filter and 60 minutes using a H Alpha filter: