speaking about camera, about 16 days ago, i finally learned how to take advantage of shutter speed of the camera. i go from novice to beginner on this i think. From using everything in auto mode to shutter priority. So that means I manually select the shutter speed i want while the other setting (iso and F-stop (aperture i think)) are still in auto mode.
Since my camera has touch focus support on the screen, i just touch the part that i wanted to be in focus after i manually select the shutter speed and the shutter speed that i select range from 1/80th to 1/160th of a second. So, on average i usually select 1/100th or 1/125th of a second. This is for taking non moving objects so i won't worry about getting motion blur while capturing the pic as i hold the camera steady in my hands. (edited and added: actually, i haven't manually selected 1/80th of a second for shutter speed yet, but even if i select that speed, its still better than around 1/30th to 1/60th of a second shutter speed that the auto mode usually selects for indoor low lighting.)
When i took pictures of non moving objects indoor, that means it will be low-light, i get high iso, as much as iso 1000 with no flash and at around 1/100th to 1/125th shutter speed. i guess there will be trade off of shooting at somewhat faster shutter speed but at high iso (iso select by auto) in indoor room lighting. But thanks to much bigger image sensor and nice quality lens, the noise is pretty low even at iso 1000. in part might also has to do with noise reduction done from camera's processor.
so, i decided to use the flash light while still shooting around 1/100th to 1/125th shutter speed indoor, and the auto iso goes down to around iso 200 to iso 500. cool, but the flash does gives the glare on objects though and that glare might cover part of the texts on objects which i realize after i uploaded the pics to the laptop's external hdd. its still cool though and i have decisions to decide if i want to use the flash or not.
so, anyway i just wanted to say thank you titan for enlightened me about the difference between iso, shutter speed, and f-stop (aperture). i think i advanced a little bit in taking pictures with camera. in part also recently, i watched a youtube video of a guy talking about shutter speed and at shutter speed 1/400th with studio light, there is still motion blur of a model moving of the captured pic, and he said that there might not be a motion blur if the shutter speed is at 1/1000th. so i realize like titan said, higher shutter speed freezes picture but gets less light.
so, for now, i learned to take advantage of shutter speed, while iso and aperture, these twos still overwhelmed me somewhat so i leave those twos in auto mode. lol.