Nikon D90 H-alpha
For those of you wondering about Nikon D90 H-alpha performance, in short, it is freakin sweet, and no, it's not modified.
NO levels or curves adjustments.
Picture control in camera set to, Monochrome with brightness +1 and red filtered.
7x300sec @iso1600, Nikon D90, Astronomik 13nm Ha filter, Megrez80 Super APO, TeleVue 0.8x flattener/reducer.