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Lead_weight

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About Lead_weight

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    Nebula

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  • Website URL
    Www.macobservatory.com

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  • Location
    Houston
  1. Thanks for the kind comments. I don't like to overcook the image, so a light processing will do.
  2. My M31. Shot over 3 nights. Only 11 total hours. LRGB only with Astrodon filters, ZWO ASI1600MM-C camera, and the WO Redcat.
  3. If you send them an email telling them you have a RedCat, they’ll email you back a word doc showing their camera lens focus system. (It’s not on their website.) That’s essentially what it is. It comes with the focus motor, belt, and mounting bracket. I did have to change the dovetail to the 11” ADM vixen dovetail with adjustable mounting holes. This allowed me to align the belt with the focus barrel. Also, focus tension is very tight, and initially the belt slipped when reversing direction. The RedCat has a focus tension adjuster at the front of the focus barrel that needs to be loosened.
  4. I've really taken a liking to this little scope. I think it's reached its final form. ZWO ASI1600MM-C main camera, EFW8 with Astrodon 5nm narrowband and LRGB filters, ZWO Mini guide scope, ZWO ASI120MM Mini guide cam, Baader Sky Surfer V red dot finder, Moonlite focuser, and CGX mount. I've spent some time imaging the North American and Pelican nebula, as well as the Veil nebula. Had about 6 clear nights in a row. I had roughly 16 hours total on NA nebula in SHO pallet, and I did the Veil on the last night, only 3 hours each channel for bi-color (the OIII channel was slightly out of focus, hence the larger stars in the image). I plan on going back and adding more data for the Veil, and intend on replacing the out of focus frames.
  5. Last week I managed to get an hour of RGB data with the ZWO ASI071 camera doing some tests for William Optics on this scope. The clouds came in quickly and I had to stop. The next day I decided to capture 4 hours of HA data on the ZWO ASI1600MM with an Astrodon 5nm HA filter. I combined the two by removing the red channel from the RGB data and replaced it with the HA data, then cropped the final image to the 1600's chip size.
  6. I shot this over 6 nights. We had an amazing go of clear nights in a row. Now it's all rain until next week. But while it was clear, I managed two nights per filter on my newest scope. A total of ~ 760 3 min images. I think the total imaging time was 37.8 hours. Shot it through my newest scope the RedCat 51mm. It did well, but could have used a belt focuser. I managed to get one together from Moonlite, but only just after imaging this. The scope was able to hold focus a good bit of the night, but the quality curve looked like a swan dive towards the end as the scope lost focus at the end of the night each night. I got out my old trusty AVX to manage the aiming parts of the setup. Guided by an old Orion SSAG I had lying around and a recently acquired ZWO Mini guide scope since it matches the RedCat so well. But I think I'm going to need to swap out the guide cam for something with smaller pixels. Overall though, it worked. Main camera was ZWO ASI 1600 MMC. I used 5nm Astrodon filters.
  7. Wow, that made a big difference. I find it difficult to capture nebulas in RGB unless I have very dark skies.
  8. My Redcat just came in this week. Had it out for the first time last night. I've been following the issues here and on Cloudy nights. Just wanted to add another another reference point. This is about 6 hours of HA. There's very slight coma at the corners. FWHM and Eccentricity look ok. I'd be happy to share data if someone wants a closer look. The larger stars have a very strange look to them, like pinched optics. Someone over on Cloudy Nights thought it might be an internal reflection. I've used this exact imaging train on other scopes and not seen the issue, so I suspect the problem lies in the scope itself.
  9. Thanks. I'm using the ZWO OAG along with the ZWO ASI174 mini guide cam. And i have a moonlite focuser made for the Edge, which has a reduced profile. My guiding is usually around .3-.5 RMS.
  10. I took this over three nights. Not as many hours as I would normally like. 8.8 hours total with the ZWO ASI071MC-Pro and the EdgeHD 11" with .7x reducer and a CGX mount. I have a fair amount of light pollution (Bortle 7-8), so this was 525 60s subs to keep under the LP. Integrated in APP, then processed in PixInsight and Photoshop.
  11. See here: https://stargazerslounge.com/topic/330669-oiii-flats-uneven/?tab=comments#comment-3604600
  12. Ahh, good to know that this probably is. It did look like something a buffing motion might create. I don’t see them in the LRGB filters, so assumed it was something related to the coating on the narrowband filters.
  13. My flats look exactly the same. OIII is the worst or has the most visible stripes across it. I have an Astrodon 5nm OIII filter. It shows up some on SII as well, and not really visible on HA. It doesn't matter whether I shoot flats with a t-shirt, use a light box, an iPad, or the sky, they all have the same pattern. I suspect it's the coating on the filters. But in any case, it fully corrects out using any of the above methods. So I regularly use a flat panel.
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