By rotating the end of the lens you are able to control the amount of light (between +1 and +8 stop values) that enters the lens.Foe example, f/4 instead of f/8 for selective sharpness instead of great depth of field, or 1/15s instead of 1/60s for a smooth, blurred water effect instead of a ‘frozen’ waterfall.
The color of the image may vary between warm and cold. This is a common phenomenon of all variable ND filters. You need to asjust your white balance accordingly when set the ND filter to different ranges.
Lens Cap or Lens Hood Do Not Fit This Filter?
The outside thread is larger than the inside one, which is our special design.The wider front filter ring helps reduce the possibility of vignetting (the darkening of corners) at wide angle. If you still want to mount lens cap, you will need to take the filter off or use a lager thread cap instead.
What's In the Box?
82mm Slim ND2-400 x 1
The main disadvantage of neutral-density filters is that to be entirely flexible in your shooting you need to carry a range of different NDs. This can become an expensive proposition, especially if using screw filters with different lens filter sizes, which would require carrying a set for each diameter of lens carried. To counter this problem, we suggest variable ND filters. These work by placing two polarizing filters together, one of which can rotate. The rear polarizing filter cuts out light in one plane.As the front element is rotated, it cuts out an increasing amount of the remaining light, the closer the front filters comes to being perpendicular to the rear filter. By using this technique, the amount of light reaching the sensor can be varied with almost infinite control.
The advantages to this are that you get multiple ND filters in one package, the disadvantage is a loss of image quality caused by both using two elements together and by combining two polarizing filters.
The Zomei Variable Neutral Density (ND) Filter 2 - 8 stops (0.6- 2.4) uses two polarizing layers to control the amount of light that passes through the filter and into the camera lens. At it's minimum effect the filter passes 1/3 of the light in a scene. That is equal to 1.5 stops on the aperture or shutter speed. At it maximum effect the filter passes just 1/400 of the light in a scene. That is equal to 8 stops on the aperture or shutter speed. This is enough to create artistic blurring shots of motion on water, cars, people or almost anything that moves.
The Zomei Variable Neutral Density (ND) Filter (0.6-2.4ND) uses high-quality optical glass from Zomei Corporation, it is available in thread sizes 40.5, 49, 52, 55, 58, 62, 67, 72, 77 and 82mm.For best results Zomei recommends using a tripod when photographing at slow shutter speeds.
"X" cross in images is a common issue with wide angle lenses and variable ND filters. Physics limit the capabilities of variable ND filters on wide angle lenses. When you enter the edge of the max range, the "X" issue may appear in your image. Because you are using it beyond its capability according to the laws of optical physics,which will inevitably cause this phenomenon.
Zomei Variable ND Allows the use of slow shutter speeds, with high speed films or digital cameras, to record movement/image blur in subjects such as waterfalls, clouds or any fast moving subject.
You are able to decrease depth of field by using wider apertures, which helps separate subjects from their background (subject matter in focus while your background is blurred).
Allows you to shoot high speed film (above ISO 400) in bright outdoor situations by reducing effective ISO. Enables cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure.
Instead of reducing the aperture to limit light, the photographer can add a ND filter to limit light, and can then set the shutter speed according to the particular motion desired (blur of water movement, for example) and the aperture set as needed.The shutter speed would be selected by finding the desired blur from subject movement. The camera would be set up for these in manual mode, and then the overall exposure adjusted darker by adjusting either aperture or shutter speed, noting the number of stops needed to bring the exposure to that which is desired. That offset would then be the amount of stops needed in the ND filter to use for that scene. Examples of this use include: Blurring water motion (e.g. waterfalls, rivers, oceans).
|Product dimensions||4.5x4.5x1 inches|
|Item weight||2.88 ounces|
|Shipping weight||3.2 ounces|
|Item model number||4332040947|
|Date first listed on amazon||August 11, 2016|
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