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Thread: Newbie Question: About Aperture

  1. #1

    Default Newbie Question: About Aperture

    Hello!

    A newbie question. I couldn't find an answer on the Search function,

    so I decided to post my question here.

    My 50MM Lens has an aperture of 1.8.
    But my camera allows me to set my aperture to alot higher.
    Same for my 18-55 kit lens.

    So how does it affect the pictures I take? I've seen people saying taking landscape photography with apertures of 12 etc. But I don't see lenses with such MIN apertures?

    So how does it work?
    Last edited by Daemarius; 20th February 2011 at 10:17 PM.

  2. #2
    Moderator catchlights's Avatar
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    Default Re: Newbie Question: About Aperture

    Quote Originally Posted by Daemarius View Post
    Hello!

    A newbie question. I couldn't find an answer on the Search function,

    so I decided to post my question here.

    My 50MM Lens has an aperture of 1.8.
    But my camera allows me to set my aperture to alot higher.
    Same for my 18-55 kit lens.

    So how does it affect the pictures I take? I've seen people saying taking landscape photography with apertures of 12 etc. But I don't see lenses with such high MAX apertures?

    So how does it work?
    a lens denote f1.8, it say it has MAXIMUM aperture of f1.8, does not mean you need to or can only or must shoot at f1.8.

    some useful reading... Photography Notes For Newbies post#5
    Shoot to Live, Live to Shoot
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  3. #3
    Senior Member shierwin's Avatar
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    Default Re: Newbie Question: About Aperture


  4. #4

    Default

    Select to A mode, shoot the same object with f1.8 & f8. From the picture you will see the different.

    Just need to try it at home will do.

  5. #5
    Senior Member Diavonex's Avatar
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    Default Re: Newbie Question: About Aperture

    Quote Originally Posted by Daemarius View Post
    Hello!

    A newbie question. I couldn't find an answer on the Search function,

    so I decided to post my question here.

    My 50MM Lens has an aperture of 1.8.
    But my camera allows me to set my aperture to alot higher.
    Same for my 18-55 kit lens.

    So how does it affect the pictures I take? I've seen people saying taking landscape photography with apertures of 12 etc. But I don't see lenses with such MIN apertures?

    So how does it work?
    This is the lens use to capture the two pictures below



    This is taken with an aperture of F1.8



    This is taken with an aperture of F22


  6. #6
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    Default Re: Newbie Question: About Aperture

    basically all the top posts have elaborated what ur asking,

    wider apertures like 1.8 (have shallower depth of field, basically the less u see is actually sharp)

    while apertures like 22 (is the opposite as to 1.8 or wider)

    reasons for landscapes to setting 11 and above is because, higher numbered apertures like 11 and above, allow better quality of images (sharper) as well as the depth of field is different from wider apertures

    thats why theres a reason why some reviews say its lenses (sharp at almost all apertures, because when wide open like 1.8 most of the time it is not as sharp when stopped down to apertures like 2.8 to 4, sweet spot)

    hope it helps
    M10|M6 Millenium|50mm f1 e58|35 f1.4 FLE|35mm f2 V1 germany|15mm V f4.5 VIII|50mm Zeiss f2

  7. #7
    Deregistered wootsk's Avatar
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    Default Re: Newbie Question: About Aperture

    I think user mistake about aperture and f-stop as people uses this 2 phrase incorrectly.

    F-stop --> The "speed" of the lens. A lower F-stop number aka F number generally means more light. The reason why the number is smaller for camera lens when there is more light is because the formula for this F number for camera lens is generate by F number = Focal Distance / Diameter of Aperture.

    So therotically, F number is smaller when Diameter of Aperture is bigger on a same Focal Distance. Do some homework on Focal Distance and Aperture.

  8. #8
    Senior Member Diavonex's Avatar
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    Default Re: Newbie Question: About Aperture

    This picture is taken with an aperture of F1.8



    This picture is taken with an aperture of F16



    The first picture have very shallow Depth Of Field (DOF)

    The second picture have very good Depth Of Field (DOF)

  9. #9
    Senior Member Diavonex's Avatar
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    Default Re: Newbie Question: About Aperture

    Take note of the shutter speed

    Both pictures were taken with ISO 100 using Aperture Priority.

    Picture one was taken with F1.8 at 1/4000 sec because the aperture was fully open.

    Picture two was taken with F16 at 1/60 sec because the aperture was almost fully close.

  10. #10
    Deregistered wootsk's Avatar
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    Default Re: Newbie Question: About Aperture

    Quote Originally Posted by Diavonex View Post
    Take note of the shutter speed

    Both pictures were taken with ISO 100 using Aperture Priority.

    Picture one was taken with F1.8 at 1/4000 sec because the aperture was fully open.

    Picture two was taken with F16 at 1/60 sec because the aperture was almost fully close.
    I sorry but F-stop isn't any related to Level of DOF but rather, it is the aperture size and Image circle to crop. I have heard from quite a number of people saying that 50mm f1.4 has more shallow DOF than 200mm f2

  11. #11
    Senior Member Diavonex's Avatar
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    Default Re: Newbie Question: About Aperture

    Quote Originally Posted by wootsk View Post
    I sorry but F-stop isn't any related to Level of DOF but rather, it is the aperture size and Image circle to crop. I have heard from quite a number of people saying that 50mm f1.4 has more shallow DOF than 200mm f2
    Depth of field is dependent on the following:

    1. Aperture

    2. Focal length

    3. Distant from subject

    See this video

    http://www.youtube.com/watch?v=OUYuU...eature=channel

  12. #12
    Deregistered wootsk's Avatar
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    Default Re: Newbie Question: About Aperture

    I know, but using F-stop to explain DOF has cost quite a number of misconception that F-stop = aperture = DOF.

    The easiest way to know your range is those lens with a DOF scale for those lens that comes with it.
    Last edited by wootsk; 21st February 2011 at 01:00 PM.

  13. #13

    Default Re: Newbie Question: About Aperture

    Diavonex illustrated well with the sponsored pics.

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