Tried out my Ha filter on the Horsehead Nebula last night. Does make a huge difference as the Ha filter leaves no sky glow. The Red stars are caused by the Ha filter.
6 Subs at 5 Min each. Celestron C11 with F6.3 Focal reducer. Modded Canon 1100D. Taken at Linden 19/09/2014
As suggested I separated the RGB Channels and added an Image of just the red channel in B&W.
Frames with narrow band filter have limitation of information. We just use these filters for this. Alone they hidden many informations.
They are very important when used as complement to a RGB image. To boost some details or structures.
They can be used to create some special presentation of the object. Bi-color, Hubble palette, ESO palette, crazy palette ... Some are very useful to show specifc details of object. Others, only to present a beautiful and impressive photo.
Frames with narrow band filter have limitation of information. We just use these filters for this. Alone they hidden many informations.
They are very important when used as complement to a RGB image. To boost some details or structures.
They can be used to create some special presentation of the object. Bi-color, Hubble palette, ESO palette, crazy palette ... Some are very useful to show specifc details of object. Others, only to present a beautiful and impressive photo.
Thanks for your information. I have Ha, O3 and S2 filters. I tried using these 3 filters on Helix Friday night but was not happy with the results. I need to do a lot of testing and learning to use these types of filters. I think Horeshead may only have Ha light so it was ok. I will have another go at helix with the Ha,S2 and O3 when I get a chance. It may also not be good to use a OSC camera with these filter. Or maybe do Color and add the filters as well. Lots to learn with narrow band filters.
Helix emits very little in the SII band - I recently tried to milk what I could out of that filter (I went deeeeeeep) but still not much joy - in hindsight, I shouldn't have bothered. The action is all in Ha (rim) and OIII (centre) for NGC 7293...
Helix emits very little in the SII band - I recently tried to milk what I could out of that filter (I went deeeeeeep) but still not much joy - in hindsight, I shouldn't have bothered. The action is all in Ha (rim) and OIII (centre) for NGC 7293...
That is what I found. Ha was good as was O3, But the O3 might have been over exposed. The S2 had almost no data. The problem I have is to combine the Ha and O3 after stacking them seperatly. When I tried to combine them in PSP the image looked like crap. I need to learn how to combine them properly.
Hi Charles - I love the horse head! and yours in particular is great!
Ha presented in monochrome is really very nice. That C11 is working well for you and you appear to get pretty accurate guiding considering you move everything to Linden. What system do you use for PA?
Bruce.
Hi Charles - I love the horse head! and yours in particular is great!
Ha presented in monochrome is really very nice. That C11 is working well for you and you appear to get pretty accurate guiding considering you move everything to Linden. What system do you use for PA?
Bruce.
I think the processing could have been better. That was also a rushed image. It was 3.00am and I was about to go home and decided to have a go at Hosehead in Ha. Came out nice. But I am sure with better processing and more subs I can do better with the C11.
Hehehe. My Polar align is usuly not the best. Most of the time i just use a compass to set the mount up as close as I can to the South Celestial pole. And the Elevation is set with a pretty accurate digital level.
I have been using an Orion ST80 with an Orion Starshoot Pro for the Guiding. With the C11 I also bought a Losmandy G11 G2. When I was doing the Tarantual last sat night the guiding was mostly holding 0.5 Arc seconds.
