Polarized3Dglasses test

... the hyperfocal distance setting ... is simply a fancy term that means the distance setting at any aperture that produces the greatest depth of field. How to Use Your Camera, New York Institute of Photography, 2000.

Another important control for landscape photography is depth of field, the amount of sharpness in a scene, from close to the camera into the distance away from the camera. It's sharpness in depth. Landscape Photography: From Snapshots to Great Shots, Rob Sheppard, 2012.

Polarisation 3dcamera

To create a 3D movie two images are projected overlayed onto the same screen through circular polarizing filters of opposite handedness. (See the What’s Happening section on the polarization page to learn about linear polarization.) Circular polarization works similar to linear polarization, except instead of the polarization running up and down, or left and right it works in left hand or right hand spirals.

The glasses you wear to view the movie contain a pair of analyzing filters (a quarter wave plate and a linear polarizer) of opposite handedness. Light that is left-circularly polarized is blocked by the right-handed analyzer, while right-circularly polarized light is blocked by the left-handed analyzer. When you view each of those through one eye your brain sees two different images and interprets that as a 3D image.

Polarized3Dglasses video

Simply put, depth-of-field is how much of a photograph is in sharp focus from front to back. Digital Landscape Photography: In the Footsteps of Ansel Adams and the Masters, Michael Frye, 2010.

We can achieve critical focus for only one plane in front of the camera, and all objects in this plane will be sharp. In addition, there will be an area just in front of and behind this plane that will appear reasonably sharp (according to the standards of sharpness required for the particular photograph and the degree of enlargement of the negative). This total region of adequate focus represents the depth of field.The Camera (Ansel Adams Photography, Book 1), Ansel Adams, Tenth Edition, 1995

Polarisation 3dglasses

Using circularly polarized light to create movies is a huge advantage over linearly polarized light. Because of the properties of circular polarization you can sit anywhere in the theater as well as move and tilt your head and get the same viewing experience. With linear polarization your best viewing position is directly in the center of the screen. You also don’t want to move your head as twisting or tilting can cause the opposition of the polarizers to bleed into each other and distort the image.

Overview: When you place different filters in front of each eye, different direction polarizers for example, you can create a stereoscopic 3D effect. Stereoscopic means placing 2 identical images, that are slightly offset, on top of one another. When these images use different polarizing directions, and you use matching polarizers, one over each eye, your brain perceives this as a 3D image.

Depth of Field (DOF) is the range of distance in a photo that appears to be in sharp focus ... Depth of field is a creative decision and one of your most important choices when composing nature photographs. Nature Photography Photo Workshop, Nat Coalson, 2011

If you set the camera's focus to the hyperfocal distance, your depth of field will extend from half of the hyperfocal distance to infinity—a much deeper depth of field. Complete Digital Photography, Ben Long, 2012.