Which gnd

A reverse GND is used for sunset or sunrise when the sun is very close to the horizon. When this happens, you want the darkest part of the GND to be at the horizon where the scene is brightest.

Just like regular neutral density filters , GNDs are available with different amounts of density. The most common ones are 2-stop and 3-stop filters. If you need to brush up on your density terminology, please refer to this detailed article on neutral density names and terminology. Facebook Twitter Pinterest Reddit Email.

You can see the difference between the previous image and the one immediately above when using a medium graduated ND. The foreground remains well-exposed, but in the second shot, the sky has a beautiful definition that was totally lacking in the first shot.

In the image above, you can see a scene that's beautiful enough, but there's not a lot of visual excitement.

It's just scenery that everyone can see with their eyes. But add an ND filter and slow down the shutter speed, and you will get much more visually pleasing results. The blurred movement of the clouds and the smoothed out the water creates an ethereal dreamy effect on the image.

Most likely you have been blown away by an image that has a silky and dreamy sky or river. Perhaps you have even tried to take images like this yourself but the result is nothing like what you hoped for. This is the time an ND filter comes into play. Remember that the transition between darkened and clear part of the filter is defined by a horizontal line.

Anything above the line will be darkened. This is not something you want in every picture. If there is a mountain, tree or head of a person above the horizon this will also be affected. Try to add one in your camera bag, it will surprise you. Kentfaith 0 Comments. Definition: What is an ND filter? An ND filter reduces the light over the whole image. What is a GND Filter? They are therefore used when the separation between the bright and the dark areas of the scene is very defined, such as the horizon line or the boundary between sea level and the sky.

Soft GNDs are therefore used where the transition between light and dark areas is not so clear. Note that your negative lead is connected to "Ground" for all of these measurements because "Ground" is your reference point , or the potential you're comparing the other points to.

OK thanks. As Dr Bruce Archambeault observed. DerStrom8 said:. Click to expand Are there any other resources, vids etc I could check out, to get more understanding, of this concept of GND? How can you not understand it yet?

ZeusMC said:. MacIntoshCZ said:. You can make your own ground everywhere in your circuitry and call it virtual ground. Then when measuring,black probe of multimeter will be at this point called COM. Externet Well-Known Member. Hello Max. In your attachment above page 1 figure; what happens to the creatures, worms, insects, organisms living underGND in the paths of electrical current?

Do they survive? Visitor Well-Known Member. The simplest way of considering ground for most circuits is that it's the common point of the circuit. Externet said:. If someone is currious then: Leaves falling on the ground. When designing circuits, it's customary to separate the commons by "quality".

These might all get connected at a single point. A resistor is placed at the receiving end. A common problem that arises is a concept called "ground loops" This is where different ground potentials are connected together. To eliminate loops in a house, sub-panels separate L,1, L2, G and N. They are connected to the main panel where G and N are joined. Daisy chained electrical outlets will raise the ground potential between devices when a fault occurs.

Lightning raises the potential of the Earth, but everything in the structure SHOULD still see the same reference, I know of an instance where it didn't happen.

Last edited: Jan 7, Very enlightening, thanks for that. You must log in or register to reply here. Similar threads B. Heat Sink is Positive ground, what does this mean? Replies 22 Views 10K. Jun 30, ronv.