Etikettarkiv: Technical

AE-L/AF-L button has 2 hidden functions

Nikon cameras (and most certainly others as well) has a button on the back side of the camera called AE-L / AF-L. The normal function of this button is to lock exposure and auto-focus so that you may recompose the shot and then press the shutter release without the camera attempting a new focus or metering and changing the exposure parameters.

This article will start off on the D70s camera that I have, but should work very similar on most Nikon digital bodies. It may also be the same for Canon and other brands although I have not verified it. If you know, please leave a comment to this effect!

Most people are probably aware that in the camera CSM menu item #15 you can control what this button actually does. The obvious choices here are the following:

  • Lock exposure and auto-focus at the same time (AF/AE mode)
  • Lock only auto-focus (AF mode)
  • Lock only exposure (AE mode)

What people generally do not know is that there are two more modes that are very useful in certain situations. These modes are:

  • Auto focus ON mode (AF-ON mode)
  • Flash metering off mode (FV mode)

They are not so well described in the manual and so you may want to practice a bit with using them! The rest of this article is to describe some situations where they are quite useful:
Fortsätt läsa AE-L/AF-L button has 2 hidden functions

Using the Histogram for Exposure Control

This article can also be found in Swedish here.

One of the most useful features of the digital camera is the histogram. This is a diagram that shows how you shot was exposed after you take it. It is invaluable to avoid over- and under exposure, but also when shooting in manual mode because just looking at the LCD is most of the time very difficult to see exactly how the exposure works.

Fortsätt läsa Using the Histogram for Exposure Control