I own a D70s and have the Sigma F2.8 18-50mm lens. I have tried using this lens at dusk (i.e. ard 6pm - 7pm) and would like to bounce the following observations off the experienced photographers here to help in my understanding. The context of the observations is to take photos handheld in Manual mode with my above mentioned lens.
1) The shutter speed for taking photos handheld without noticeable handshake is from 1/60 onwards?
2) From dusk onwards, I would definitely need to up my ISO 800 onwards if I want to maintain a shutter speed(e.g. 1/60) at F2.8 to avoid handshake?
3) F2.8 seems to be the only aperture size to use after 7pm for handheld and the ISO is somewhat at 1600 which is very grainy. Is there any way to shoot a less grainy photo with my F2.8 lens during this time without tripod or PP?
Separate observation on metering
1) If I meter a darker location, the camera will tend to overexpose the photo? And vice-versa?