At some point, we’ve all come back from a shoot and been disappointed to find
that the image or images we’ve believe to have captured successfully have had
something wrong with them.
Maybe the wrong shutter speed has caused
details to blur, or perhaps focus was slightly off. Or perhaps depth of field
didn’t extend as far back or forward as we thought it would.
This is
particularly disheartening when capturing a landscape, given the effort that
goes into getting to a location in good time, setting up and waiting for the
perfect moment.
So, to make sure you always come away with your images as
best as you get them them, here are five key things to check as you’re shooting.
1. Use a lens hood – and make sure it’s mounted properly
Lens hoods are
one of the simplest and most useful lens accessories, but they’re often
forgotten about. They help to ensure that extraneous light in the scene does not
creep into the image and affect contrast and saturation, and so they’re
particularly useful in landscape photography.
Whenever you use a lens
hood you should make sure of two things. The first is that you’re using the
correct hood; these are designed for specific lenses so that they are most
effective at blocking light for the particular focal length(s) of a lens, but
it’s easy to mistake one for another if you have more than one and they have the
same diameter.
Using the wrong hood could lead to vignetting in your
image, so get into the habit of reverse mounting your hood on your lens (if
possible) to make sure it always stays on the right lens.
The other thing
to check is that the hood is mounted correctly. This isn’t a concern with round
lens hoods as they provide the same protection however they are rotated, but
petal-shaped lens hoods are designed for the aspect ratio of your sensor, and
when they’re not correctly mounted they can darken the corners of the frame (and
this is easy to miss).
Most click slightly when they are in the correct
position, with the longer petals vertical and the shorter ones horizontal, so
check this is the case before you shoot.
Vignetting is also easily caused by filters with deep profiles, or when using a
number of filters at the same time, and the effects can be so gradual that it
can be hard to appreciate until you view your image on a larger display. When
buying filters, look out for those with a low-profile design as these should
help to keep this to a minimum
3. Use your depth-of-field preview function
Most cameras only close down
the aperture to the selected f-stop just before you take the image, rather than
as and when this is changed on the camera.
The reason for this is that,
by using the widest aperture to admit the most light, the camera’s autofocus
system can work most effectively, although this also means that you don’t get
the best idea of what effect that aperture will have on depth of field until
you’ve captured the shot.
Clearly, when shooting a landscape, you want to
make sure you either have focus and sharpness extending throughout the whole
scene or just the selected elements in focus, and the depth-of-field preview
function allows you to check this prior to shooting.
This temporarily
closes down the aperture to the selected f-stop, so you will typically see the
view darken as this happens, particularly at very small apertures. Nevertheless,
it should give you a better idea of what will and won’t be in focus in the final
image..
4. Zoom in to check focus
Most cameras allow you to check focus by
zooming into the frame, either as you’re composing the image or once you’ve
captured it. Some cameras even usefully automatically zoom into the image to
100% at the press of a button or similar control.
You will typically be
able to move around the scene to so that you can see whether different parts are
focused, and you may be able to use this in conjunction with focus peaking (if
your camera offers this), which is great if you want to manually fine-tune
focus.
5. Check your highlights
The range of tones within a landscape can be far
greater than in most other images, and it’s important to make sure you’re not
losing any highlight detail in areas such as skies; fine gradations between
lighter parts of the scene are always preferable to clipped
highlights.
Naturally you may use a graduated ND filter to help bring
this down to a more manageable level, although however you’ve chosen to capture
the image, it’s a good idea to activate some kind of highlight warning
feature.
The manner in which this is displayed differs between cameras.
The majority of interchangeable-lens cameras offer histograms that show where
detail is being lost, and a line rising all the way to the top of the
right-hand-side of the chart will indicate that this happened with highlight
detail.
On playing back an image, you may be able to set your camera to
flash a coloured warning over areas with clipped highlight details so that you
can adjust your exposure and recapture the image.
Many recent cameras
have a Zebra patterning option to show where highlight detail is being lost, and
this can be a useful tool if you use either the LCD screen or an electronic
viewfinder for the purpose of composition.
Bear in mind that the above
controls are more relevant to JPEG files from the camera rather than the
potential malleability of Raw files, and that you may be able to improve this in
post production. Nevertheless, it’s always a good idea to make sure you’ve
captured as much of this as possible to begin with.
No comments:
Post a Comment