152mm A+M Refractor(OfficinaStellare-1200mmF/L) using a TeleVue .8XReducer/Flattener for an effect of 950mmFL and a BreakThrough X4-UV 49mm filter with step-rings to 48mm , and a CanonEOSII RebelT7i modified UV-IR @ Hutech .. on an Astro-Physics 1200GTO Mount at 1xSiderealGuideRate and 'guiding' , and taking RAWMonochrome Autosave Sequences for two each of 47sec ISO200 and ISO400 and two each of 67sec and one each of 87sec ; , and one each of 47secISO800 and ISO1600 and ISO3200 one each of 67secISO800 and ISO1600 and ISO3200 and one of 87secISO800 and one 87secISO1600 and two 87secISO3200 ; , and one 47secISO6400 and one 87secISO3200 and one 67secISO6400 and three 87secISO6400 and two 67secISO12800... I processed the images like I usually do and then I put ISO200 and ISO400 into one Folder and ISO800 and ISO1600 and ISO3200 into another Folder and and ISO6400 and one ISO3200 and two ISO12800 into another Folder and then each Folder was Sum stacked because Sum stacking made the denser color areas not over-saturated and when I stacked each Folder separately as Sum I then stacked all the FITS stacked results of each Folder together as Average stacked to try to keep the Sh2-155(Cave Nebula) more transparent instead of color over-saturated . From an Bin2 size I did a "Double Size" to the final stacked image and then I used the 'screen-stretch' at Max-Val and I then used the "Digital Development - GaussianBlur- 1.0 radius" and then I used the "Levels -Gamma ' .75 ' and the 'green-carot' for brightness all the way to the right " , and then I used the "Kernal Filter with 'pixel-restrictions' for the mid-values to sharpen the image and then a mild-blur " , various other command to lower over-reddened areas , and this is the result .x
