# Stepping to the left - stepping to the right

Discussion in 'Beginner Questions' started by boris_activia, Apr 5, 2010.

1. ### boris_activia

I was wondering if someone might be able to clarify what this phrase means 'Stepping to the left - stepping to the right' I presume it has something to do with exposure

2. ### jpo3136b

The "step" part is a shutter speed adjustment, usually in an increment of three. For example, 1/30, 1/40, 1/50, 1/60 would each be a step. In that sequence of four numbers, there are three spaces between them. A "stop" adjustment would be in increments of two (1/30 to 1/60, skipping everything in between but creating a doubling or halving value of the preceding number).
The left side of some of these exposure graphs usually represents a black tone; bright white is to the right. So, "to the left" means under-exposing; "to the right" means over-exposing; or, adding less or more exposure with respect to the direction on the graph.
Say your exposure was 1/40; a step to the left would be 1/50 (adding one step less light); a step to the right would be 1/30 (adding one step more light).
For convenience, some DSLRs will allow you to change in what increments the shutter speeds increase or decrease. Many people will just use the camera set for stops (1/30, 1/60, 1/125) but they can, in some models, be set for steps (1/30, 1/40, 1/50).
This "one step" adjustment being referred to will usually make a very small change to the image. It'd be about as small of a change in exposure as you might notice with the eye if you compared the two photos side by side.

3. ### umesh_bhayaraju

http://en.wikipedia.org/wiki/Exposure_value... you need to read this webpage to understand whats under n over exposure. Also though mostly shutter speed is used traditionally, you can adjust with aperture as you can control in the 1/3rd stops in particular with new dslrs. check the EV scale in the camera.