F-stop

The f-stop number is a ratio of the focal length of the lens to the diameter of the aperture. A lens is said to be "wide open" when it's set on its smallest f-stop, or with the aperture opened as wide as possible.

You can begin to make use of the power of the f-stop when you're taking those candids at home. This is a job for the wide open f-stop, a setting of f/4 or so.

F-stop: A measure of the size of the opening in a lens calibratred to a corresponding focal length. These numbers are typically stated as f/1.4, 2,2.8,5.6,11,16,32,etc. Large f-stops (e.g., f/22) allow less light to enter the camera.

F-stop values are traditionally incremented by stops. Each stop is a standard value that allows half as much light through as the previous stop and twice as much light as the next stop.

F-stop should be at about 2.0. I find that much lower that that and you get more near-misses, and much higher results in blur from longer shutter speeds.

F-STOP- The f-stop of a lens is a number that represents the aperture opening. A large opening is a small f number, and a small opening is a large f stop. Lenses are rated in the range of f-stop numbers they can be set to.

f-stop. A numerical designation (f/2, f 2.8, etc.) indicating the size of the aperture (lens opening). GIF. An image file format designed for display of line art on the Web.

f-stop Useful for determining the maximum flash to-subject distance for flash photography.

f-stop: A means of measuring the width of the diaphragm opening, which determines how much light passes through the lens.

f-stop A number indicating the size of the diaphragm's aperture in a lens. An f-stop number is not a constant measurement, but is calculated from the size of the aperture and the focal length of the lens. On a given lens an aperture of f2.

F-Stop . Number indicating the size of the aperture. It is an inversely proportionate number as in F2.8 is a large opening and F16 is a small opening.

f-stop number = GN / distance distance = GN / fstop number Guide numbers are important in manual flash calculations. Electronic flash units are often sold on the basis of their guide numbers. Note a few points about this, however.

f-stop - A numerical designation that indicates the size of the aperture. It is inversely proportional as a smaller number like F2.8 is a large opening and a large number like F16 is a relatively small opening.

F-stop A number that indicates the relative size of the opening of the lens (aperture) and written, for example, as f/16.

f-stop see Stop Fall-off (Light on a surface) The size of the area on a surface where light and shadows merge. Soft sources produce a gradual transition, a subtle gradation of tones. Hard sources, without Fill Light, change abruptly.

f-stop fixed sizes at which the apperature of the lens can be set; a number established by dividing the focal length of a lens by the diameter of the lens opening. ft abbreciation for foot.

(f-stop) Numbers on the lens barrel indicating the size of the aperture relative to the focal length of the lens. f numbers are calculated by dividing the focal length of the lens by the effective diameter of the aperture.

The f-stop you set on your lens also has an effect on the sharpness of your pictures. All lenses are at their sharpest when closed down two to three stops from their widest apertures. Try to avoid the widest and the slowest f-stops if possible.

chosen f-stop: 5.6 max. distance = 80 / 5.6 = ~14.2 meters Note: If you have to go to the limit it is usually not such a good idea to place your subject at the calculated max. distance.

Bigger f-stop numbers create bigger depth-of-field (and, thus, more of everything in the picture remaining in focus).

Aperture, F-stop A camera's aperture works like the iris of your eye, expanding and contracting to adjust the amount of light which passes through. The smaller the aperture, the less light it admits.

f numbers f-stops A numerical designation (f/2, f 2.8, f3 etc.) indicating the size of the aperture. Firewire ...

effective f-stop = marked f-stop x (magnification/PMF + 1) so a 3X magnification of a non symmetrical lens (PMF .5) at f32 is actually f 224! and thus very fuzzy or grainy -adrian ...

There are 5 f-stops between the max and min aperture. If your camera's lens is currently set at an aperture of F5.6, closing it by 1 f-stop would mean selecting F8; opening it up by 1 f-stop would mean selecting F4. F1.8 F2.8 ...

F F-Number, F-Stop See Aperture. Fill-In Light Additional light from a lamp, flash, or reflector; used to soften or fill in the shadows or dark picture areas caused by the brighter main light. Called fill-in flash when electronic flash is used.

F-numbers or F-stops Numbers on the lens aperture ring and the camera's LCD (where applicable) that indicate the size of lens aperture. The lower the number the larger the aperture. As the scale rises, each number is multiplied by a factor of 1.4.

[edit] Stops, f-stop conventions, and exposure A Canon 7 mounted with a 50 mm lens capable of an exceptional f/0.95 ...

ƒ-stop - (f-stop or F/stop) A lens aperture setting calibrated to an f-number (see above). FALLOFF - Decrease in the intensity of light as it spreads out from the source.

Most lenses have f-stops that are represented numerically by integral powers of the square root of two. Common f-numbers on a lens are f/1, f/2, f/4, f/8, etc. More Articles from This Category « Previous Article ...

(An EV unit corresponds to about 1 f-stop of exposure adjustment.) We found this fine-grained exposure adjustment very nice compared to most cameras, which only let you adjust in units of 1/2 EV.

Measured in f-stops. Altering by one F-stop either halves or doubles the amount of light reaching the film. Top B Top C contrast Relationship between tones on negative or print. The range of grey tones produced between black and white. Top D ...

One f-stop of light gathering capability, which is huge. Add to that the sensor-based image stabilizer and you have some capabilities that would make a Canon EOS user drool. Olympus 12-60mm f/2.8-4.

Discussions as to f-stops and shutter speeds are almost as boring as cleaning "0" rings. THE BEST WAY TO GET THE CORRECT EXPOSURE IS TO GUESS. Being lucky is a great help for a budding underwater photographer.

Manually set the white balance, focus, f-stop, and shutter speed on your camera. This ensures that it doesn't light meter every shot and your photos aren't all differently exposed.

The aperture on a camera, which is measured in f-stops, does exactly the same thing by controlling the amount of light that reaches the CCD.

For any particular focal length lens and distance the lens is focused on, the determinant of the depth of field is the size of the lens aperture (opening), measured by the f-stop.

This is where aperture, F-Stop, and depth of field come into play. This is how you begin to control how your camera flattens the scene. In general, you want the subject and a small part of the foreground in focus but the background blurry.

The size of the aperture is measured using an f-number also called the f-stop (F8, f/8, etc). The smaller the f-number, the larger the camera's opening. The size of the aperture directly affects depth of field and shutter speed.

Manual mode only offers 2 F-stop settings Slow, unreliable focus in low light Ugly, bulky lens hood (although you don't have to use it) Mediocre build quality Only basic external controls Longwinded menu structure ...

Also called f-stops, they work in conjunction with shutter speeds to indicate exposure settings.

Dependent on the chosen aperture (f-stop), the focal length and the focus distance you have a certain depth-of-field (DOF). The DOF defines a zone around the chosen focus point where objects appear to be sharp.

The Noise Engine reduces image noise by up to two f-stops: for example, processed ISO 1600 images will have noise equivalent to straight ISO 400 images.

The most commonly used unit for measuring dynamic range in digital cameras is the f-stop, which describes total light range by powers of 2.

The aperture value, or "f-stop," is expressed as a fraction of the focal length of the lens. The lens focal length is expressed in millimeters, with 50mm being the focal length of a standard lens.

Each full f/number, also called a stop or f-stop, halves or doubles image brightness and some lenses can also be controlled in half or third steps. The most common f/numbers are 1.4, 2, 2.8, 4, 5.6, 8, 11, 16 and 22.

Use aperature-priority with the lowest f-stop on the fastest lens I have (f1.8 or lower if you can). 4.

The size of the aperture hole is referred to f-stops. The larger the f-stop number, the smaller the lens opening, and the more depth of field you will receive in a photograph. Also the larger the f-stop number, the slower the shutter must be.

The aperture diameter is expressed in f-stops; the lower the number, the larger the aperture. For instance, the aperture opening when set to f/2.8 is larger than at f/8.

Stop (see Aperture & f-stop) Stop An acid rinse, usually a solution of acetic acid, whose purpose is to stop development by neutralizing unwanted developer when processing black-and-white film or paper. (see Dev.) ...

The increase in overall exposure turned out to be about 1/3 of an f-stop. Keep in mind this will change if you move the fill light closer or farther away.

Accessories Aperture Buying a digital camera Buying a DSLR Depth of field DSLR DSLR accessories DSLR lens EXIF Exposure F-stop Flash Focal length Focal length multiplier Focus ISO JPEG LCD Megapixels Nature Noise Photo editing RAW Shooting Modes ...

The amount of light that reaches a film frame or a digital sensor or the combination of f-stop (light intensity) and shutter speed (duration) that controls the amount of light reaching the film or sensor.

Aperture - A term that relates to how much light enters the camera through the shutter. Measured in f-stops, the smaller the f-stop number, the more light that is admitted.

Shoot on Aperture Priority and pick a small f-stop, such as f/2.8 (the lower the f-number the shallower the depth of field) and focus on the part of the frame you want in focus. This technique works particularly well to diffuse busy backgrounds.

Aperture - The opening in a camera lens through which light passes to expose the film, also called "f-stop" or "f-number." The size of aperture is either fixed or adjustable and may be adjusted manually or automatically depending on the camera.

A flattering lighting ratio for this type of portrait is about a 1 f-stop difference between the main light and the fill light (1 stop less).

" Every time you take a picture, the shutter speed, f-stop, white balance setting, flash mode, ISO, and more are captured and stored with the picture. Later, when viewing your images, this makes it much easier to analyze what went wrong... and right.

ND filters come in many strengths. A special numbering system is used to identify each strength. Basically, .1 = 1/3 f-stop in the ND filter numbering scheme. So, a .1 ND filter cuts 1/3 stop, and a .3 ND filter cuts 1 stop. Macro Filters ...

All of this is affected by the camera's settings, including the film speed (ISO), aperture (F-stop) and shutter speed as well. Click for a more detailed explanation of the aperture .

The camera is also very easy to use. There is no need to use a light meter or to calculate shutter speeds and f-stops.

See also: Camera, Photograph, Light, Image, Lens