Vignetting ... dealing with
Vignetting is a condition where the
camera lens sees the wall around the
camera barrel. The image taken
includes the wall thereby forming a
circle around it. The picture on the right
illustrates this condition.
Vignetting is specially obvious when
using a sighting device and 'picTeur'.
However, 'picTeur' is optimally
designed to minimize the appearance
Zooming makes the image bigger and can completely vanish the vignette.
The camera barrel is extended more and more as zooming increases.
Without using a sighting device, the camera barrel is free to extend and
retract without obstruction. So adjusting the focusing range is not too much
of a concern. Image is normal subject to filters being used.
With a sighting device the movement of the camera barrel is restricted
because it is stopped by the eyepiece of the sighting device. On the
recommended camera models, focusing range is fixed at a certain point
which does not allow the camera barrel to move any farther. Focus is
adjusted at the sighting device. Depending on the distance of the object, and
the size of the image desired, vignette may or may not appear.
|Use 'picTeur' to
veterans of the armed
Digital Camera Lens Guard and Use Extender - Patent No. 9,300,847