[Startrek (Martin)]

Peter,
The amount of Binning should be based on your resolution and sampling ( not whether your computer can handle Startools)
I usually Bin default 50% as I’m oversampled and can afford to trade resolution for noise, plus I still get round stars zoomed in , not blocky stars zoomed in. If your undersampled then a lower Bin should work ok.

I find Film Dev blows out your stretch across the whole image where as with AutoDev you can set a Region of Interest ROI with your mouse and control where you want more dynamic range around an object rather than waisting it in black interstellar space and stars. “Ingnore fine detail” setting works well too from 2 to 5 pixels and gives a good balance of detail
I always use AutoDev for first stretch ( inspection) and AutoDev for final stretch


Using APT Flats Aid make sure what ever you set your Target ADU say 30,000 or in my case 20,000 that you check the Histogram by pressing the Local button. This should show your 3 peaks ( RGB ) across the whole range of the camera’s ADU 0 to 65,536 and they should sit around 1/4 to 1/2 way across.
As long as the left side ( black point ) is around 8000 to 9000 and the right side ( white point ) is around 30,000 to 35,000 ( or up to half way across the Histogram ) the your flats should be ok
Make sure you have the later or latest version of APT as the older ones didn’t allow you to see the whole ADU range across the Histogram

See attached example of my Flats Aid Tool and Histogram

In regard to sampling and image scale your Esprit 150 has a native focal length of 1050mm
So if you using no reducers etc your image scale would be -

3.76 x 206.3 / 1050 = 0.72 arc sec per pixel ( oversampled )

Therefore under average to good conditions you would benefit greatly by using Bin 50% default ) in Startools
With my Newts my image scale is between 0.88 to 0.62 arc sec / pixel and Bin 50% default works a treat


Cheers
Martin