a bright sunny sky, and dark green jungle vegetation, the
rain forest will be underexposed, the sky will be overexposed.
But you can easily correct for this with a graduated
filter which is dark at the top and clear at the bottom.
class of filter is crucial to improving your studio photography
of art. To get good relieve on the art objects the lights
are generally above the objects. This means that the top
of the object has more light than the bottom. You can easily
correct this situation with a graduated filter.
will need a filter holder for this, one that allows you
to slide the long filter up or down (meaning out the bottom
of the holder, so the holder has to be open down there).
users will want the Sinar system. Their holders actually
fit Hasselblad lens mounts. Adapters can be obtained
for most any other lens screw size.
you cannot afford the Sinar accessories, there are
several other less expensive graduated filter systems,
such as Coklin.