Andrew Burwell replied to the topic 'Hardware recommendation needed for focuser' in the forum. 4 days ago

I'll second the Moonlite focusers. I have two as well, and they work flawlessly. You only need one controller, the Mini V2 with it. Or, if you buy a motorized rotator, you can use the dual controller.

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Andrew Burwell replied to the topic 'Add Gain to the capture module' in the forum. 2 weeks ago

Will it save this as part of my imaging sequence?

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Andrew Burwell replied to the topic 'Another successful set of nights with EKOS' in the forum. 2 weeks ago

Yeah, this was a bi-color image using the mono ASI1600MM-C camera. 7 hours of HA, and 7 hours of OIII data over two nights.

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I have two equipment profiles. One for an RC6 with Moonlite focuser, and another for a 102mm APO with Moonlite focuser. Because the focusers are the same brand, I noticed that the driver under the equipment manager maintains the the same settings for either device as if it's the same device.

Where this causes me an issue is that the draw tube length on the APO is around 28,400 ticks on the stepper motor, and for the RC6 it's around 4,500. So, if I've been imaging with one and the max range is set to 4,500, then switch to the other is 28,400, I have to manually update the max range even though I'm loading a new profile. Is there any way to store the settings separately per profile?

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Andrew Burwell created a new topic ' Another successful set of nights with EKOS' in the forum. 2 weeks ago

Thank you all who contribute to this application. I had a series of successful nights with EKOS imaging on my Mac laptop!

get.jpg?insecure

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Andrew Burwell created a new topic ' Add Gain to the capture module' in the forum. 2 weeks ago

I was imaging narrowband over the last few nights, and was really wishing for a gain option in the capture module. I was imaging Ha at 200 gain, and wanted to do OIII at 300 gain, and had to do them in two sessions over two nights instead of the same night. I like to raise the gain for OIII since it's more difficult to image. Then obviously, when generating darks and bias, then I had to do them over two sessions as well, rather than setting them up to all run at once.

Thanks!

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Andrew Burwell replied to the topic 'Announcing Ekos Live' in the forum. 4 weeks ago

Really amazing work. I can't believe how full featured it is for a V1. Great job.

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Andrew Burwell created a new topic ' EQ6R-Pro & Indi' in the forum. 3 months ago

Does anyone have any experience with this fairly new Sky-watcher mount? Is it compatible with the INDI drivers and EQMod? I need a little more mount capacity than my AVX has, and am considering the options for the next weight class up to 45-50 lbs.

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Andrew Burwell replied to the topic 'Second night out with KSTARS/EKOS' in the forum. 4 months ago

That's not too far off from where I'm at in terms of how my unprocessed stretched calibrated images look. There are some features in PixInsight that can tackle the noise issue. One thing you can do is extract the luminance, adjust the curves so that all the background of the luminance is dark, and only the stars and object show through. Then use that as a mask on the color image to desaturate and darken the background, which removes all that noise color, then apply MultiScaleLinearTransform to blur that noise into a generally solid smooth color. Then reverse the mask and increase the contrast and color on the stars and objects you imaged without effecting the background.

Also, and this can't be stated enough, the worse your light pollution, the more integration time you need. I would push your times to 6-8 hours of data and see how much that improves your images. Imaging the same object over multiple nights feels like a misuse of a clear night, but if you're interested in better quality, this is what you need to do.

One other thing with regards to imaging. Some online studies by really diligent amateurs have shown that running the ASI1600 at -20C cuts noise in half. So that's something minor you can do right way. And, regarding mono. One way to battle light pollution is to shoot narrowband (which mostly limits you to nebulas). Narrowband images at frequencies that are not effected by light pollution and the moonlight. Depending on the filters you use, they can be to some degree, but the better filters block 95% or more of the light pollution and moon glow.

Also, I find Astro Pixel Processor (for me) is better than PixInsight for integration, light pollution removal, and color calibration. I then take it into PixInsight and enhance everything with their very unique tools.

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Andrew Burwell replied to the topic 'Second night out with KSTARS/EKOS' in the forum. 4 months ago

El Corazon wrote: www.indilib.org/support/community/photos...um.html?albumid=1901
Sorry, I haven't figured out how to link to that full frame image. Here the link to the entire album in my profile. Just select the Leo Triplet image there to get a larger view.
Are you using a light pollution suppression filter in addition to LRGB?


No light pollution filter on this particular image, though I have used one extensively in the past on my one shot color camera. Your camera and integration time can certainly have an effect, but also you probably have more signal noise due to light pollution, so that means you'll need more integration time to counter for it. Also, your processing technique can certainly effect the final quality as well, though looking at your images, there's so much noise I'm inclined to believe this is the removal of the light pollution that's causing this.

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Andrew Burwell replied to the topic 'Second night out with KSTARS/EKOS' in the forum. 4 months ago

Thanks! I don't know what happened with your image, it shows up as a tiny thumbnail. Can you relink it?

It's taken some time to get to this level of quality. I'm going through some of my first shots with my 102, and ugh, they're terrible. Haha.

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Andrew Burwell replied to the topic 'First time issues with automated focusing' in the forum. 4 months ago

knro wrote: I've actually had similar experience with the dust motes. I ended up shooting flats immediately after a filter capture is complete. Now that I think about it again... It might be a good idea to store the filter offset for each filter somewhere and then when flats for that filter are taken, the filter is moved to the position.... Ok I'll add this to my TODO list.

Regarding ADUs, I take it at 25k personally, some even suggest going higher. IMO, it's not an exact science as some might claim so it would take a bit of trial and error to see what works best for your optical train.


What's the difference between storing the offset, versus the absolute position of the filter? Would the absolute position be more accurate, if for instance you accidentally moved the focuser before you shot flats?

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Andrew Burwell replied to the topic 'Re:First time issues with automated focusing' in the forum. 4 months ago

TallFurryMan wrote: I'm far from being an expert at this, but to me flats provide correction for dust/vignetting located on the optical path between lens and photosites. Thus focus shouldn't have any impact because that path is moving as a whole during that process, except for the the scattering of light over the sensor. But I can't see any reason to change the focus for flats neither. I suppose the type of optics would also make a difference, doublet or triplet refractors for instance. Still, I'm no expert at this.

-Eric


You're right in that the focuser is moving all imaging gear as a whole. But it's distance from the objective, which you are shooting through, changes. Thus the focus of any object through the objective, or dust on the objective, changes relative to the distance from the focuser. That's my understanding anyway.

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