Capturing the Bubble Nebula in HOO required gathering data over two nights from a Bortle 3/4 location in Upstate New York, totaling 12 hours of exposure. The equipment used included a William Optics Redcat 51 telescope paired with a ZWO ASI 183MC Pro camera, mounted on a Celestron AVX mount. After stacking the data with WBPP, processing was completed in PixInsight using Narrowband Normalization.
This project also provided an opportunity to refine processing techniques by learning to apply color masks—a step previously avoided in favor of simpler workflows. The result is a detailed image achieved while maintaining an efficient and straightforward processing approach.
I’ve also been working with a Redcat 51, and your 12-hour integration from a dark site really shows the value of patient data collection. Learning to use color masks in PixInsight is a game-changer I recently tackled too—it felt daunting but finally getting that separation made all my narrowband images pop. What was the trickiest part of applying the Narrowband Normalization for you?
Thanks for sharing your own Redcat 51 experience—it’s great to hear that mastering color masks has also elevated your narrowband work. The trickiest part of Narrowband Normalization for me was initially balancing the background neutralization without washing out the delicate OIII structures in the bubble’s rim; I found that applying a gentle stretch to each channel before the normalization script gave me more control. I’d be curious to see how your next project turns out, so feel free to share an update on your progress.
I’ve been hesitant to try narrowband processing with my own Redcat 51, so it’s inspiring to see such a clean 12-hour HOO result from a similar setup. Your point about finally tackling color masks resonates—I’ve also avoided them for a simpler workflow, but this image shows the payoff. Maybe it’s time for me to gather data on a target like the Veil Nebula and commit to learning that step; what was the biggest hurdle when you first applied the color mask?
Thanks for the kind words—it’s great to hear from another Redcat 51 user who’s also been putting off color masks! The biggest initial hurdle was simply knowing where to start, so I found that creating a very gentle mask from a clone of the image itself, and then using it to tweak saturation and contrast on just the nebula, made the process less intimidating. If you do gather that Veil Nebula data, I’d love to hear how your processing goes or if you hit any snags along the way.
I’ve been hesitant to try narrowband processing with my own Redcat 51, so seeing your 12-hour HOO result from a Bortle 3/4 zone is really motivating. Your point about finally tackling color masks resonates—I’ve also avoided them for a simpler workflow, but the detail in your Bubble Nebula shows it’s worth the effort. What was the biggest challenge in applying Narrowband Normalization to this dataset?
Thanks for your kind words—I’m glad to hear that seeing the 12-hour result from a similar setup is motivating! The biggest challenge with Narrowband Normalization for this dataset was balancing the intensity of the OIII signal against the Ha without washing out the delicate bubble structure; I found that applying a gentle stretch to each channel separately before combination gave me more control. If you’re considering trying it, I’d suggest starting with a practice dataset on a brighter target like the Orion Nebula to get comfortable with the process—I’d love to hear how it goes when you give it a shot!
Beautiful capture of the Bubble Nebula in HOO.
Thank you.
Great shot! I missed capturing this due to clouds, but it’s a fascinating nebula.
Thank you. I think it’s a challenging target, and perhaps not ideal at 250mm, but it’s still a very impressive nebula.
The Bubble Nebula is a great target that isn’t photographed often. I didn’t realize it had so much surrounding dust, and I envy your dark skies. I recently acquired a used apo120 and this was on my list, but the weather has been persistently cloudy in my area for the last three months. I’m definitely planning to capture it next year. I just started imaging the Thor’s Helmet Nebula last night, which is another interesting deep-sky object that doesn’t get much attention.