The camera is a varifocal ?
According to the dictionary, varifocal is the quality of a lens allowing the image adjustments allowing for the magnification of a distant object without a loss of sharpness, in the process commonly referred to as ZOOM.
The varifocal lens differs from that of parfocais, whose focus is already determined through the so-called progressive.
How it works a camera with a varifocal lens?
The varifocal lens you have two adjustments:
- Focal length, which will determine the aperture angle.
- Distance of pickup, the longer the focal length, the smaller the angle, and vice-versa.
Once you have adjusted to the focal length, you can adjust the focus to the focal distance fixed, the adjustment of “FOCUS” will make a fine adjustment of the image according to the defined scene.
The set Camera/Lens at the larger and smaller distances will not be possible to properly adjust the focus and for this you will need to adjust the inner ring of the fitting (Screw) of the camera, or some specific setting for this, but this concept refers to the older or simply analog, because today we have cameras which has this adjustment using a joystick or the controls on the screen:
What is the advantage of the zoom lens motorized?
- A camera with a zoom lens motorized will reduce the work load
- Installation without the need to adjust physical
- Lower installation cost
- Capture an angle of view different with a fixed lens camera
Disadvantages of camera Varifocal
The only “disadvantage” to purchase a camera varifocal lens is the cost, these cameras varifocal tend to be more expensive than the cameras with fixed lenses.
Well folks… today our article was short, but very informative, I hope that you have enjoyed and that has been helpful, I’m looking forward to your participation in the comments.
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