Anyone have the Baader 8nm OIII?

[orly_andico]

I have one, but for the life of me I cannot pull any OIII signal out of the Rosette.

I am using 10-minute subs with an f/3 reflector (AT8IN + ASA reducer).

Am wondering if I got a bum OIII filter.  Or is OIII at such a similar frequency to LP that it can't discriminate and a 3nm filter is "needed?"

Here is a 600-second OIII - https://dl.dropboxusercontent.com/u/63497702/R_600s_O3_001.fit

and a 600-second H-a of the same object (on another night) - https://dl.dropboxusercontent.com/u/63497702/R2_600s_Ha_001_3.fit

(caution each file is over 16MB)

[jnc71106]

given the very close proximty of an 89% moon to the rosette i'd say thats not helping very much, H-Alpha is the only narrowband i'd shoot when the moon is around. OIII and SII forget it imho

cant you provide a dropbox link to the stacked OIII subs as a single sub isnt going to show much anyway