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Lead_weight

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About Lead_weight

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    Nebula

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    Www.macobservatory.com

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  • Location
    Houston
  1. One note about your comment on flats. Turn on your DSLR histogram function if it has one. This will display a histogram like I show above in Photoshop on the back of your camera after each capture. Make sure the histogram (the hump of light) is bright enough that it falls squarely between the left and right sides of the histogram frame without being cut off on the left or right side. Alternatively, you can load your flat into Photoshop, and look at the histogram there to see the same thing.
  2. Lots of good detail! Color balance is definitely off. So, good that you could see that. I took the liberty (hopefully you don't mind) of pulling this image into Photoshop and looking at your individual color channels. As you can see in the histogram, there are different amounts of Red Green and Blue, and they don't align. Aligning the channels using the levels tool creates a neutral black. This brings the colors of the galaxy back in line, closer to where it should be. Depending on the program you use to process you should be able to achieve better color correction with the built in tools. Here's your current image with the unaligned color channels. Best shown in the top histogram where you can see red, green, and blue not overlapping. Here's a version where I simply aligned each channels histogram using the levels tool in Photoshop. Now you have a neutral black, and galaxy colors appear more correct. In any image processing program from here, you would isolate the galaxy with a mask, so that you can modify it, without changing the neutrality of the black background. You would then enhance the color of the galaxy through saturation and other color correction measures to get it to a more expected result. Hope that helps.
  3. I’ve been imaging with my EdgeHD 11”. I have the low profile Edge Moonlite focuser. This allows you to lock down your primary mirror, eliminating mirror flop, and use an OAG for guiding. You’ll need an extremely sensitive guide camera, as you’ll often have only very dim guide stars. It’s not always the case, but a lot of galaxy targets that are not in the milky way will have less stars to guide on.
  4. I've never owned an EQ6-R, but did have a CGX, and used it with my Edge HD 11. It can certainly handle the weight. My rig ran around 35 lbs. The focal length is the killer, as these mounts are cheaply made. I consider that I got a pretty decent CGX. and I guided the EdgeHD 11 reduced with the .7x reducer to around 1960mm. My guiding was sub arc second often .4-.8. But it was always worse in RA. Typical guiding would be .4 DEC RMS and .8 RA RMS. At this focal length, you could see the stars were a little oval. If you were running it with a hyper star, I doubt you would see the oval stars. They would look round. You could probably never reliably run the Edge 11 at native focal length (2800mm) with either of these mounts, as all imperfections of the mount would show in your images. Wind gusts would move the mount...dragging cables move the mount. so keep that in mind. You need a tidy setup, well balanced, with nothing to interfere at longer focal lengths. Hopefully that helps with your decision.
  5. Thanks for the kind comments. I don't like to overcook the image, so a light processing will do.
  6. My M31. Shot over 3 nights. Only 11 total hours. LRGB only with Astrodon filters, ZWO ASI1600MM-C camera, and the WO Redcat.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. Wow, that made a big difference. I find it difficult to capture nebulas in RGB unless I have very dark skies.
  12. 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.
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