FunkyKoval35

Well, total explosure time will be the same in both cases, but you are absolutely right about noise. Stack of shorter single explosures will be much noiser - faint regions, if they will be visible at all, they will be much noinser. Example:

Hi. Are you using USB 3 cables? In my setup I had a similar problem. When ZWO EAF was in use(autofocusing) my guiding camera(ASI120MM mini) was constantly disconnected - not enough voltage to operate both(?) . After changing ALL cables to USB 3 ones problem dissapeared. Disappearing camera from the list after disconneting is normal. After disappearing, the camera may receive a new address (COM port) and that's why you need to reinstall the camera`s USB cable to allow ASIAIR to see it.

The simplest way to check where is the problem is to take a few shots without any filter. If halos will disappear then you will know that it is not problem with your camera. Also, you can check if protective glass in your camera is clean. BTW. Nice picture

Are you sure it is camera issue? It looks like typical reflection from filter - too close to the sensor or foulty. A couple years ago I had similar problem with Baader OIII filter: 5 x 1200s, Sbig ST2000XM I was able to remove halo from the star in PS, but it was annoying: Do you have halos when you are not using any filter, or only on particular filter/filters?

Thanks. Yes, I am happy that setup, especially SA GTI is working nice Now, time to save money for astro dedicated CCD camera and filters...

Hi. The first image taken using my new setup: William Optics Zenihstar Z73 III + Canon 1100D(full spectrum) + OAG(ASI120MM) + SW SA GTI. I am suprised how well SW SA GTI can guide - around 0.5" tot error. For comparision, on my previous mount HEQ5 PRO I was able to guide with tot error of 1.0" - 1.2". Total explosure time is 40 min - 20 x 120s. Bortle 7 sky and no filters used. Flats and darks applied. Converted to b/w. Processed in Siril + PS. Crop on M13:

Yours stars are not cut off. If you look closely you will see that yours stars are elongated at the edge of entire picture. It looks like your sensor is to close to flatener. https://optcorp.com/blogs/deep-sky-imaging/how-to-set-the-correct-back-focus

Hi Don. I have the same mount. Check to what COM port number your mount is assigned(Control panel -> Hardware and Sound -> Device Manager) and make sure that in synscan pro app connecting settings you have the same COM port selected. Also, I do not know what is your setup, but if your mount will be powered by batteries, and you will connect it by USB, then I suggest to turn off wfi on your mount to lower power consumption. You can do it in synscan pro app wfi connectin settings - will be accessible when you connect your mount by wfi(!). You do not need hand controller at all... I am controlling my mount in NINA together with Stellarium using USB 3 ports and cables with no any issues

Yes, but kids are also lerned how to solve the problems/tasks - reading, calculating, etc..

Agree. Most of the people thinks that inteligence = self-consciousness. Well, mabey in the future, but self-consciousness is not needed for inteligence. With your definition humans are not inteligent because kids are learned at school and by parents - other human input . Inteligence is, first of all, ability to solve problems/tasks. The process of acquiring this ability is irrelevant.

First of all.. I never mentioned that people MUST have this gear or that gear... Of course, everyone has equipment they can afford or want to have. I only claimed in my comment that you are givin wrong assumption/information that it does not really matter if we do multiple short exposures or one long exposure. It is not about signal itself... When you do shorter exposures you have lower SNR - Signal to Noise Ratio. http://dslr-astrophotography.com/long-exposures-multiple-shorter-exposures/

I disagree. There is a reason why companies are making tracking mounts for astrophotography, and peoples are buying them 10x30s image will be much noiser and will have much less detiails than 1x300s image.

https://www.ebay.co.uk/itm/354237766527

I agree. A lot of light pollution, not enough exposure time - M81 is much fainter than M82. I created arificial flat and subscrat it from image in PS to confirm that.

Good site, but.. I do not see any seeing data...?