Despite this object heading toward Melbourne's light dome from a Bortle 6 location, a 7nm Optolong Ha filter had no problems pulling out the nebulosity surrounding Eta Carina last night. Just a test to see how it would perform. I had to push the subs out to 5 mins to achieve enough signal to show some detail. Mounted on an old HEQ5 non GOTO, I shot 8 x 300 second unguided subs with a vintage Pentax 135mm prime lens set at f5.6, using a Modded Canon 550d for a total of 40 mins exposure at 1600iso. Some darks but no flats, this image is a process of the red channel only. It's rather noisy but the filter passed the test.
