Howdy
I havent shot the Eagle Neb in Ha with the 10 inch scope as yet so tried it tonight, and as nights are warmer tried shorter high ISO shots as longer ISO 400 shots of the Helix proved dissapointing.
I was pleasantly surprised with the result
7x5 mins ISO 1600, 7 Nm Ha filter, 10 inch F5.6.
I nearly didnt get the image done as I had trouble finding the object, due to the sky being so bright with moonlight, I had to virtually "star hop" to it and could in the end only see it in the finder with averted vision, centering it in the scope by taking 10 sec test shots, then moving the scope and so on.
To help recuce dark current noise I took 4 darks instead of the usual one, and did so immediately after the light images with camera at similar temperature.
Severe buffeting happened during some of the images, the 7 Nm filter apparently blocking so much starlight the "wiggles" didnt show up
Im very surprised to get what I got, narrowband imaging of emission line nebulae rocks when theres a moon about
As usual, processed in Iris and Photoshop, resized for viewing here.
Scott