focal length
focal distance
focus ***

It does not change the focal length of the system.

An 85-mm focal length was used to record the image.

But let's say you use the 28-millimeter focal length fairly often.

The order is based on the focal length of the lens.

But the need to consider the impact of focal length remains just as important.

I need to know the focal length of the camera lens.

Do remember though, you are paying a lot of money for a camera with one single focal length.

Variation in focal length is one of the chief benefits.

It is used for changing the focal length of the lens.

The moral of the story is that focal lengths are not to be taken for granted.

At the longer focal length, you'll have a closer, clearer view of the subject.

Hold up a paper in the reflected light, about two focal lengths from the mirror.

The long focal length required for this particular photo had flattened the image to begin with.

This will change the focal length of the lens, and give a bigger image.

Camera lenses are made in a wide range of focal lengths.

Here, is the focal length of the lens in centimeters.

The focal length of the camera is also set.

As a result, the new normal, at least for focal lengths, is about 35 millimeters.

This is the perfect focal length for distortion free portraits.

This produces focal lengths that are dependent on the color of the light.

View camera lenses are designed with both focal length and coverage in mind.

The objective focal length of the telescope is 4000 mm.

For a given visual angle, image size depends on focal length.

The longer the focal length of the eyepiece, the greater the eye relief.

It helps visualise the field of view for another focal length.

An object image is calculated at a given focal distance.

The difference of the focal distances is a constant.

This changes the focal distance of the eye so that it can focus on objects at various distances.

The flange focal distance between mount and film is 47 mm.

The shorter flange focal distance may also allow for smaller, lighter and lower cost.

Lens mounts with shorter flange focal distances are longer and heavier.

The first variable-focal-length lens with fixed back focal distance for 35 mm cameras, introduced in 1964.

The system used a lens mount called A-mount, with a flange focal distance 44.50 mm.

A recessed lens board effectively reduces the flange focal distance of a camera.

The resulting higher quality of beam can be exploited either to obtain a smaller focus diameter or a larger focal distance.

This list of lens mounts is ordered by flange focal distance, from shortest to longest.

The mount is a bayonet type, with a 65 clockwise lock, and a flange focal distance of 43.5 mm.

The corresponding front focal distance is:

It is critical to be consistent in hoof positioning and focal distance in order to make objective comparisons.

The focal distance seen by the user was set by the amount of vertical curvature of the mirror.

The interchangeable backs allowed to insert the extension rings to compensate the difference in focal distance among the various lenses.

It is done by lowering the stage (increasing the focal distance) of the petrographic microscope and observing which direction the light appears to "move" toward.

Typically this so-called flange focal distance is over 40mm on most interchangeable lens cameras.

The smaller flange focal distance allows for more compact normal and wideangle lenses.

Conventional autofocus is achieved by vertically changing the focal distance until a focused image plane is found.

It is not identical to Nikon F-mount, which has a much longer flange focal distance of 46.5 mm.

This latter statement is clearly incorrect, or misstated, being off by a factor of focal distance (focal length).

(The flange focal distance and diameter also differ.)

Turning the adjustment wheel moves the lamp to correct the focal distance and restores the all-white projected image.

Depth of field (not to be confused with depth of focus) is determined by the aperture size and the focal distance.

Over the years, the group has found its true focus.

They made small talk but kept their focus on the game.

So you have to keep your focus on the game.

But after 11 years, he seems to have lost focus.

But you have to make sure where your focus is.

The technology's role in music will continue to come into focus.

Present at the end, he was still the focus of the season.

As a result, much about the program was out of focus.

In death she has become a focus of the question why.

My focus has to be on doing what's right for the kids.

Here, the whole focus is on how to get these points.

After all, they may never have seen the world in focus.

As he did so, the world came back into focus.

And then brought his eyes into focus on her face.

My view may well be a little out of focus.

At the same time the focus of attention will be on him.

Another important focus is the process of doing teacher research.

Moved in so close her eyes were out of focus.

Then she tried to put a focus on the future.

May seemed to try to get me into better focus.

And for the first time the room came into focus.

To make his story work he needed a single focus.

He has made the state a central focus of his campaign.

I'm not going to go to a focus group to find out.

But for now, the focus of the action is in the ground.