What is a large aperture,when used in photography?

Question

What is a large aperture,when used in photography?

Answer 1

A large aperture is a big opening in the iris of the lens. This means that it is letting in a lot of light. It is best used for low light conditions, slow moving or stationary objects and items that don't need a lot of depth of field in other words focus! A large aperture would be like f1.4 a small aperture would be f22. The smaller the aperture the more range of focus you have.  

Answer 2

it controls the light that comes into the shutter.

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Answer 3

A large aperture is a small f/ stop number.  f/4.0, f/5.0, f/5.6 ect

The wider the aperture the more light hits the film plane or on a digital the sensor.  Wider apertures are used to blur out a distracting background.  Wider apertures are also good for portraits.  The technique is called selective focus.  Here are some examples:

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Answer 4

the aperture is in the lens, it controls the amount of light the film or sensor recieves by being a big opening or a small one

f1, f1.4, f1.8, f2 are large apertures

apertures are used for every image recorded by camera

one uses a large aperture in low light or to create short depth in an image

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Answer 5

the smaller the number the larger the aperture

this gives a very shallow depth of field, very little is in focus

the group known as f64 shot with a very small aperture, everything was in focus

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Answer 6

All camera lenses have a aperture or f/stop ring or a way to control this thru the camera...

Lenses are sold with 2 important numbers given.

The 1st # is usually the mm focal length, like 18~200. This alone tells me its a zoom, from 18mm (quite wide angle) to 200mm (a good all purpose telephoto size) as well as anywhere in between.

The 2nd important set of #'s are the lenses f/stop setting, always starting at the largest or most open the lens can do first, like 3.5 to 5.6. In this case these #'s tell me, 1 - it's not a very 'fast' lens, and 2 - as I zoom this lens out to the 200mm setting it gets even less light now.

Some lenses have only 1 number, for both the mm size and f/stop. These are called - Primes - and they can have #'s like 85mm f/1.8 or 55mm f/1.2 or 300mm f/4. Just by looking at these #'s a camera bug type of a person can start to drool...

Most any large aperture lens is only good if used AT that large aperture. Once stopped down to say, 3.5 or 5.6 you gain nothing that large aperture could have given you, other than it does offer a brighter view thru the camera.

Many want lenses with large aperture's for DOF - Depth Of Field control, also known as - selective focusing. In some model shoots if doing a 45% angle shot of a head, you can get the forward eye, the one nearest the camera, in sharp crystal clear focus while their nose or other eye went soft or blurry.

Wildlife, sports, action, modeling, nature and general scenery can all benefit from this kind of control IF their lens can do it. Then there is low light photography. Night scenes. Astronomy.. Again, many areas where one could use a large aperture lens with out being to - specialized.

The drawback..! These lenses are not cheap. Any large aperture lens generally will be 2 or 3 times what it's counterpart may be if it were, say a 3.5. Example - A Nikon 85mm f/1.8 is around $360. However a 85mm f/1.4 is over $1200... A 50mm 1.8 can be $95 while a 50mm 1.4 is $300..

Again, a large aperture lens is best used AT that large aperture in order to justify it's meaning in your camera bag, and if not used like this, save boo coo money and buy the f/3.5 version..

Bob - Tucson