This compares small cropped portions of images with exposures varied from 4 to 16 minutes with a stack of 3 16 minute exposures.

All were taken with a Modified Canon T1i camera mounted on the VCO 128mm Televue refractor. The processing steps were the same for all except for the stacking and alignment step in the case of the stacked image.

Note that for this subject the camera modification was not very relavent as there is little H alpha signal. The results should be similar to what most unmodified DSLRs would give.