Hi guys,
I finally had an opportunity to test out the Orion 7nm H-alpha filter. It seems to work quite well. Check out this image of the ring nebula (2 x 10 min - no calibration frames at all, just lights) through the APM 130/780 using the ATIK 16 HR. I was shooting from my light polluted backyard, so the filter seems to work as advertised.
Anjal.
I finally had an opportunity to test out the Orion 7nm H-alpha filter. It seems to work quite well. Check out this image of the ring nebula (2 x 10 min - no calibration frames at all, just lights) through the APM 130/780 using the ATIK 16 HR. I was shooting from my light polluted backyard, so the filter seems to work as advertised.
Anjal.
Attached Image: