I've seen green on many occassions when viewing M42 through a 4.5" reflector without a Nebula filter. When under darker skies... mag 5.5 - 6, I've picked up on some purplish-pinks along with the green. I was very excited on the three occassions that I saw such amazing color through a small aperture scope. I found the green to be very distinct, and the purplish-pinks to be more subtle, but definitely there. A friend of mine also picked up on the same aray of color , though are perception in regard to what shade of green and purplish-pink was somewhat different. We did see similar colors in the same exact regions of the orion nebula. "J"
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Re: Is it possible to see the nebula with colour?
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, though are perception in regard to what shade of green and purplish-pink was somewhat different. We did see similar colors in the same exact regions of the orion nebula. 
"J"
