|
Forum: Photographic Technique
04-03-2019, 04:17 PM
|
| |
if you are going to use spot metering in place of EV compensation and matrix metering, then you likely should either shoot in manual mode with green button metering, or use the exposure lock function in what ever auto exposure mode you are using (Av Tv or Tav mode) by either of these actions you can meter first, then reframe the shot as you want for composition, I am no sure with today's cameras, but in the days before digital, centre weighted metering in many cameras was biased to the lower portion of the horizontal frame because of the premise that the sky was always bright, there were tests done with off centre lights and both left and right rotated vertical formats that gave different results.
The fundamental idea of EV compensation is somewhat more related to the need to deliberately under / over expose a whole series, for example when shooting either low key or high key shots, or when shooting in snow where the whole thing will be dull grey when you don't, or in the slide film days when you under exposed by 1/3 to 1/2 stop to increase color saturation, when using bodies that had DX encoded film cartridge readers, and you wanted to force the exposure compensation, or deliberately push process B&W film,
Before DX encoding you simply set the ISO differently, most people for example shot Kodachrome 64 at ISO 80, effectively under exposing by 1/3 stop, or shot 400ISO B&W film at anything from 800 to 3200 ISO and then compensated by extending developing time to get correct density on the negative, but really grainy shots
I trust this helps
|
