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Hints and Tips
Shaking off the Shakes
Camera shake is an often under-estimated
problem, especially for 35mm workers. The resolution of prints
enlarged beyond 10x8" is particularly vulnerable, with minute
vibrations over fractions of a second causing disastrous
degradation of an image.
Here are a few tips to reduce this
problem.
Camera Support
Unless it is possible to use rapid
shutter speeds (less than 1/250th/sec), a tripod is a must. This
should be as expensive and as robust as you can afford. A cheap,
light tripod can give a false sense of security. It may be easier to
carry but is probably not worth the bother or the expense.
The same goes for ball heads and three
way heads; use the best quality possible. Any weak link in the
system makes the expense of the rest a waste of money!
A good quality bean bag can be an
effective tripod substitute. It may even be better than a tripod in
very windy conditions or in awkward corners. Camera bags plus or
minus bean bags on top, can also be used for support especially when
taking pictures low down or close ups near ground level. They can be
easier to position than "bagpipe tripods" such a Benbo or Uni-Loc.
The latter are none the less excellent for many situations, BUT when
used with horizontal or vertical extension their stability is
severely compromised, especially in a wind or with a camera that has
a heavy, slapping SLR mirror and a crude metal shutter.
Tips for tripod stability
Check that the legs are tight and firmly
set on the ground.
Moss and other soft, springy surfaces
can be a problem, as the tripod is sitting on a trampoline!
Use centre tube vertical extension
carefully as this reduces stability enormously even with expensive
tripods, especially in a wind. Using a bean bag on top of a fence,
gate post or car can be the preferred option.
Find a way (if no hook) of hanging a
camera bag around the tripod so as to increase stability, by
weighting it down, especially when windy.
Check that all moving parts of ball
heads and three way heads are screwed firmly onto the tripod and
that quick release plates are really stable - remember the weakest
link!
Weight for weight, carbon fibre tripods
are reckoned to be more stable that metal types.
Tips for camera use
Use a mechanical or electronic cable
release. Although more expensive, electronic releases are likely to
set up less vibration.
For stationary subjects use the delayed
action timer. If possible set it to a 2 seconds minimum to allow
vibration cause by a cable release to die down.
If your camera has a "mirror up"
facility use it as often as possible to reduce the vibration that
mirror movement creates.
Check your technique
It may be worth checking your techniques
by setting up a series of test shots of a convenient subject, such
as a stately home with plenty of windows, gargoyles and the like to
create fine detail. For each camera used, set up using your tripod
remembering the hints given above. Take several shots (to test
consistency). Then hand hold and take several shots of the same
subject Note the wind conditions, focal length of the lens, shutter
speed etc.
Take more shots with a weighted tripod
or with and without vertical extension and so on. You can test the
effect of any variable so long as you only change one at a time and
compare back to your first base test. If you use slide film, project
your results to a good size on a top quality screen and check the
sharpness of detail. If using negative film, enlarge small areas to
the equivalent of at least a 12x16" print and once again make
comparisons. You might like to test the use of a bean bag or lighter
tripod in the same way. The variables you could test are almost
infinite. You could take a series of hand held shots at different
shutter speeds to discover the speed (for you, your camera and any
particular lens) at which camera shake becomes unacceptable.
Deryck Ford
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