A Photography Guide: Aperture
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(56 votes)
Published: Sep 07, 2009 11:08 p.m.
Viewed 323 times |
This is a guide to teach you the specifics of your lens’ aperture and what you can do with it.
I hope some readers gain knowledge they did not yet have about photography from this guide.
Overview:
Aperture: A hole or an opening through which light travels.
Whether it be a simple pinhole, a point and shoot, or a complex single-lens reflex (SLR), all camera lenses are equipped with an aperture.
The aperture controls how much light is brought into the camera, and in turn onto the photo paper or image sensor.
Aperture Settings:
The aperture of a lens is measured in aperture stops, also known as f-stops or f-numbers.
The f-numbers on lenses varies but follows the same sequence: f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16.
More expensive, but professional cameras have a wider range. (Professional movie cameras can have f-numbers as low as f/0.75).
As the f-number increases, the size of the aperture decreases.
This diagram shows some f-numbers and their apertures:
Most point and shoot cameras (those with no interchangeable lenses) do not have a setting to change the aperture.
On the contrary, all SLR cameras do. This setting is called aperture priority, and is shows on cameras as "A" or "AV".
The aperture priority is a "semi-automatic" setting.
Meaning that while you can change the size of the aperture, the camera will automatically change the shutter speed and ISO.
How To Use Aperture:
The aperture of a lens changes many things about a photograph.
Some of these include:
- The depth of field (the length from the camera to the subject that is in focus)
- The amount of detail
- Light entering the camera
Using a large aperture (small f-number) will give you a small depth of field.
While shooting a portrait photograph, you need to use a large aperture.
This will ensure that the background is unfocused, bringing all the attention of the viewer to the subject.
A large aperture will also increase the detail in the subject, which is great for portrait photography.
Using a small aperture (large f-number) will give you a very large depth of field.
This is perfect for landscape photographs.
Using a small aperture will get the entire scene in focus, instead of just one subject in your view.
NOTE: Decreasing the aperture size will decrease the shutter speed, causing moving objects in your shot to be blurred.
So if shooting in poor lighting, have a tripod on hand.
Here are some photos i took showing the difference between a large aperture and a small aperture:
The photo on the top being a large aperture (f/4.5), with plenty of detail in the flower, and a small depth of field.
The photo on the bottom is a small aperture (f/25), with a much larger depth of field, but reduced detail.
That is all you should need to know about apertures.
Hope you enjoyed. Feed back appreciated.
UNCLE |
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 | Sep 08, 2009 12:52 am -
Very nice. 5* |
 | Sep 08, 2009 3:56 am -
Look cool man.
I dont do any photography, but very well done.
Five.d |
 | Sep 08, 2009 5:25 am -
good job..i wont use it but 5* |
 | Sep 08, 2009 8:48 am -
Two good eggs in one day? Can this be possible on RE? Ha!
Very nice. I really needed this info. I have a 35mm camera with just about every attachment imaginable and I have no clue how to use it. I also have boxes full of film.
Five stars for you. |
 | Sep 08, 2009 11:31 am -
5* |
 | Sep 08, 2009 1:39 pm -
well done egg yo. 5*S |
 | Sep 08, 2009 9:45 pm - ...
5* my friend, and well earned, too. |
 | Sep 09, 2009 10:38 am -
Fantastic egg. |
 | Sep 09, 2009 10:52 pm -
Fantastic, I just bought a DSLR and am getting used to all the new settings I can change. You should do one on ISO speeds! |
 | Sep 10, 2009 7:23 am -
THATS GREAT ! THIS IS THE KIND OF USEFULL INFO THAT ULTRON WILL USE TO DESTROY ROTTENEGGS ! 15*S |
 | Sep 10, 2009 7:24 am -
Very nice. I actually learned something! :D |
 | Sep 10, 2009 4:11 pm -
Great egg dude! 5* |
| Sep 12, 2009 5:34 pm -
why does this have a low rating? it’s a great egg |
 | Sep 14, 2009 4:47 pm -
I learn this in school :)
nice egg though 5 starzzzzzzzz |
| Sep 22, 2009 5:52 pm -
Quote: why does this have a low rating? it’s a great egg
It’s still early, he’s got until 07 October 2009.
We won’t let UncleHip fall by the wayside.
I’ll five it every week. |
 | Sep 22, 2009 8:31 pm -
Thank you lads. |
 | Sep 23, 2009 10:11 pm -
bump for your ratings. |
| Sep 25, 2009 3:03 am -
sucks how noobs rate your eggs down cuz they are like "wtfz is a aperturees"
scrubs, ive been rating this shit 5 every time i go into the egg directoy but its still only 3 :( |
 | Oct 02, 2009 2:19 pm -
B’dass. 5* |
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