The reason why your shots have that blueish tinge to them is because your camera isn't sensitive to Ha light. Your camera isn't modded, am I correct? If it had the IR cutoff filter in the camera removed, you'd get nice red tones in your nebs. You'd also still get the blues as well, from the reflection nebs in the pics. Most cameras that are unmodded will take piccies like that, with most of the best response being in the blue end and only relatively weak red, if any at all. It depends on the make of your camera and the chip it uses as to what the results will look like. I've seen pics that actually look aqua/green/turquoise in the nebs, taken with unmodded cameras.
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