>>3233835You never touched a camera, have you? In astro you always use the optimum settings (ISO between 1600 and 3200) to get the best SNR, also expose to the right. You close the aperture on your lens because you want corner sharpness similar to center, The deal with astro is not the gain you set the sensor on but the actual photons being registered.
On top of that the Sony algorithm removes captured information you worked so hard to get, to such degree that more stars show up on a short exposure than on a long one, and believe me, short exposure don't have much stars in the first place.
Doing astro on a sony is pointless, no matter how you set up ISO or try to believe flatearth magic because you need an actual understanding of basic physics.
Pic very much related.
