This Is a sharpness test that i did with my 150p with the diy primary mirror mask.
20s x 140 rgb
#Strange fov on North america nebula
indigo dock
Stars in lower-left corner are a bit out of focus
Starless version
tropic mica
stars being out of focus in the corner with so small FOV is quite weird. Looks like REALLY bad tilt / collimation, but that also seems unlikely
indigo dock
stars being out of focus in the corner with so small FOV is quite weird. Looks l...
Yes, the collimation was ok, i did this the same night as the 10 mins on m16