7 exposures 1 second is the longest for the earthshine
Shot in Hot Springs AR Sony a6700 400mm (600 equivalent), tracked
Is your histogram peaked up against the right? If so you cannot recover detail or color. If it is not then a combination of moving the exposure, highlights and white balance sliders should work.
If you have access to a 3d printer this is great https://www.thingiverse.com/thing:2441640
I usually set it up to use a 2 second timer with brackets, it will take the whole bracket with a single push/release. Hand held it gives me time to get steady to prevent movement. This is on a Sony.
For great results you need a goto tracking editorial mount like iexos 100, a lens is a reasonable start and much less complicated to set up the a telescope. A clip in filter like an optilong l-pro to tame light pollution. An ASIAIR will make the experience easier and more pleasurable. Next step up is to add a guide camera/scope so you can take longer exposures
I see them for sale at buffaloimaging and https://photo.kooerys.com/product/epson-roll-media-adapter-for-surecolor-p800/
Could you just make one with a dowel or pvc pipe (with t and l connections you could make a self standing roller with a couple of Oxo clips to keep paper centered)?
300 sec lum and 600 for ha, r, g, b
LHaRGB image 12 inch scope FF Mono camera processed in Astropixel Processor and Photoshop
The stars of the southern sky are amazing, get some milky way shots with a rokinon 14 mm
Black on black makes cool creepy floating heads
The app, solar eclipse timer (fee to open April eclipse data), and the ebook they sell are great resources before and during the eclipse
WO GT71 scope with flattener/reducer, LRGB 3 1/2 hours of data processed in Astropixel processor and Photoshop. I anointed my photo in Telescopius. M78 is the blue in the lower left and Bogeyman is the unmarked lighter area in the dark nebulosity that kind of looks like a sideways man between LDN 1624 and LBN 934