Don't expect Nat Geo standards at ISO 2500 for 15 sec. Also 10X 15 sec is not the same as 1X 150sec ceterus paribus. At 15 sec you can get away with the camera tripod, but at 150 sec you need a polar aligned tracking equatorial mount unless you want to shoot star trails
encourage amateur to take more pictures and don't be bogged down with irrelevant parameters please.
Agreed on the sen-sen from mymoon. Am also aware of the gravity of expectation as pointed in the quote; hence the shot was left on short duration of exposures. Whats lacking are the experience on realism of expectation from the exponential amount of data vs shot exposures at a dark sky location.
Anyway, Selamat Berpuasa for those who observe the ibadah, and those who don't; enjoy shopping them foods @ pasar ramadhan near your location.