So this picture was a 30 second exposure. I really thought it would be more exposed than it was. My fstop was as low was it would go- around 4. Should i have tried a flash, or did i just need to have a longer exposure? Do you need to use bulb mode to shoot the stars? I used photoshop to increase the exposure. Is that maybe why there's so much noise? I shot in RAW. I don't even know if i'm asking the right questions. Any advice would be appreciated. And i know the subject may not be that great, but i was just struggling with getting it in focus and exposed.