Smart Photography 201707

Manual exposure mode is also

recommended when using electronic

flash. If you were to use Aperture

priority mode with flash for example,

and the ambient light is low, the camera

will use a very slow shutter speed

which will cause a ghost image (double

image) – one from the flash and the

other for the low ambient light.

Manual exposure and

Auto ISO

Here’s a tip for manual exposure

lovers. Let’s say that you wish to use a

constant aperture – the ‘sweet spot’ –

and a constant high shutter speed (to

prevent hand shake) all the time. So

we’ll assume that you always want to

use, say, f/8 (your sweet spot aperture)

and 1/1000 sec (the shutter speed at

which you feel comfortable that your

hand won’t shake). You can use this

exposure combination in all lighting

situations if you set your camera to

Auto ISO. Once set, the camera will

change only the ISO sensitivity. If the

light is bright, the camera will select a

lower ISO; if the illumination drops, the

camera will automatically compensate

that light loss by increasing the ISO.

You can also set the limits for the Auto

ISO. For example, if you know that your

camera gives you unaccepatbly noise

images after say, ISO 3200, then you

can set the upper limit to the Auto ISO

at ISO 3200. Please do check your user

manual about any limitaions of the

Auto ISO feature. Also keep in mind that

on some makes of D-SLRs, exposure

compensation feature does not work in

manual exposure mode.

Conclusion

It’s important to be conversant with

all the exsposure modes that your

camera provides. It’s also important

to understand how the exposure

compensation feature works and when

to use it. I would also add that you

should be very familiar with all the

metering modes too. Every feature

in your camera can be considered

similar to a link in a chain. If a single

link in a chain is weak, then the entire

chain is weak. So is the case with

your camera; not knowing about any

feature or how the feature works, can

be detrimental to your progress as a

photographer. |SP

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Smart PhotographyJuly 2017