Aperture


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Tantalize

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#1
I've got a headache trying to understand aperture of the camera. I understand that the lowest aperture gives you a blur in the background of the object (greater DOF).

So do we only use the lowest aperture when we are taking still shots and not to focus on the background?

How about when we are taking picture of a night scenery? Do we take in high aperture?

I know these question sounds silly, but I need to understand this in order to learn more about my camera. Thanks guys.
 

Tzzw86

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Mar 31, 2009
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#3
i believe its about how u want your picture to turn out.. since i think u understand DOF, when taking the picture, ask yourself.. what u wanna focus on..
personally i think a sharp back ground might draw attention away from your main subject.

if u are talking about landscaping night shots.. then using a small aperture/High F-stop is fine, since most probably you'll be using a tripod.. shutter speed is of no concern to you..

i hope it helps..
 

Jan 31, 2009
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#4
I've got a headache trying to understand aperture of the camera. I understand that the lowest aperture gives you a blur in the background of the object (greater DOF).

Yes, you are right to say that lowest aperture (widest opening) produces greater DOF.

So do we only use the lowest aperture when we are taking still shots and not to focus on the background?
Not true. It depends on your composition. Sometimes you might want a sharp backgroud, then use higher aperture (smaller opening).

How about when we are taking picture of a night scenery? Do we take in high aperture?
Not really true. But from my understanding, smaller aperture (around F8) will give you sharper image. But of course, lenght of exposure will be longer. Using wider aperture will need less exposure time. This of course will also have to depend on your ISO setting.

I know these question sounds silly, but I need to understand this in order to learn more about my camera. Thanks guys.
No is not, we are all here to learn :)

Have fun with you cam :)
 

Tantalize

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#5
Photography Notes For Newbies

read post #5 and #6, if don't understand, ask again.
Yup read that. Thanks.

i believe its about how u want your picture to turn out.. since i think u understand DOF, when taking the picture, ask yourself.. what u wanna focus on..
personally i think a sharp back ground might draw attention away from your main subject.

if u are talking about landscaping night shots.. then using a small aperture/High F-stop is fine, since most probably you'll be using a tripod.. shutter speed is of no concern to you..

i hope it helps..
Will try that out tomorrow :)

No is not, we are all here to learn :)

Have fun with you cam :)
Thanks, it is indeed a great learning place.

One more question if you guys don't mind, if I set my ISO to lowest, aperture to around 16, and speed to very slow, it will not give higher noise will it?
 

Jan 31, 2009
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#6
One more question if you guys don't mind, if I set my ISO to lowest, aperture to around 16, and speed to very slow, it will not give higher noise will it?

How long will your exposure be ? From my understanding, there are basically 2 types of noise, High ISO and Long exposure.

For High ISO noises, quite standard that once it reaches certain number, noise will form (dependent on cam make and model)

As for Long exposure, you will have to try it out on how long you can go before noise sits in for each ISO.
 

Tantalize

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#7
How long will your exposure be ? From my understanding, there are basically 2 types of noise, High ISO and Long exposure.

For High ISO noises, quite standard that once it reaches certain number, noise will form (dependent on cam make and model)

As for Long exposure, you will have to try it out on how long you can go before noise sits in for each ISO.
Thanks. Exposure I might go for around 30 seconds. Haven't try out yet, will post up the image once I took them tomorrow :) Will try take few shots to check if I do have enough exposure on the images ;)
 

Rashkae

Senior Member
Nov 28, 2005
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#8
I've got a headache trying to understand aperture of the camera. I understand that the lowest aperture gives you a blur in the background of the object (greater DOF).
WRONG.
 

Rashkae

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Nov 28, 2005
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#10
Mind to elaborate more about this? Thanks.
"I understand that the lowest aperture gives you a blur in the background of the object (greater DOF)."

1. Lowest aperture = sharp foreground and backgroud.
2. Largerst aperture = blurred background and SMALLER DOF.


Read the photography notes for newbies. It explains things nicely. Also, there are quite a few good books in the library.
 

Tantalize

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Mar 18, 2009
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#11
"I understand that the lowest aperture gives you a blur in the background of the object (greater DOF)."

1. Lowest aperture = sharp foreground and backgroud.
2. Largerst aperture = blurred background and SMALLER DOF.


Read the photography notes for newbies. It explains things nicely. Also, there are quite a few good books in the library.
Dear Rashkae, just noticed that I've misquote the technical term for lowest and largest aperture. I've took the numbers in the camera literally, when it should be the size of the aperture on the camera. ;p
 

catchlights

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Sep 27, 2004
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#12
Aperture is expressed as F-stop, e.g. F2.8 or f/2.8. The smaller the F-stop number (or f/value), the larger the lens opening (aperture).
taken from
What Is... Aperture? - Digital Photography Tutorial - Photoxels




A lower f-number denotes a greater aperture opening which allows more light to reach the film or image sensor.
taken from
Aperture - Wikipedia, the free encyclopedia


if you mention lower number aperture, you are reffering to smaller in number aperture (bigger the hole).

but when you say lower aperture, you are not specify which ends you are referring, which is very confusing to yourself and everybody. it is better to use the term of LARGE aperture or SMALL aperture instead.
 

Tantalize

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Mar 18, 2009
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#13
taken from
What Is... Aperture? - Digital Photography Tutorial - Photoxels




taken from
Aperture - Wikipedia, the free encyclopedia


if you mention lower number aperture, you are reffering to smaller in number aperture (bigger the hole).

but when you say lower aperture, you are not specify which ends you are referring, which is very confusing to yourself and everybody. it is better to use the term of LARGE aperture or SMALL aperture instead.
Noted :) Thanks
 

skygon

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May 11, 2009
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#14
the f number is a ratio... it tells u a few things, including the depth of field (how much depth of acceptable sharpness in the object space, bigger f number means larger space), size of the aperture ( bigger f number means smaller size ) ...
 

bomby929

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Feb 18, 2008
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#15
"I understand that the lowest aperture gives you a blur in the background of the object (greater DOF)."

1. Lowest aperture = sharp foreground and backgroud.
2. Largerst aperture = blurred background and SMALLER DOF.


Read the photography notes for newbies. It explains things nicely. Also, there are quite a few good books in the library.
Should it be Smallest vs Largest? Lowest vs highest? Lowest is never associated with largest...
 

Last edited:

aryanto

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Feb 16, 2005
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#16
When you say big apperture, it means low F-number, like F2.8 and below.
When you say small apperture, it means large F-number, like F9 and above, can go upto like F22
In between I would say they are medium apperture.
 

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