Noobn question

Discussion in 'Photography Beginners' Forum' started by Eddie_uv777, Jan 10, 2007.

  1. Eddie_uv777

    Eddie_uv777 TPF Noob!

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    what's apterture?, I have an idea from what i've read, but I still don't know and how do I set it on my cam?
     
  2. theRossatron

    theRossatron TPF Noob!

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    Basically Aperture just means opening or hole etc. In the case of photographt it refers to the the hole in the lens/camera that lets the light through onto the sensor.

    Big apertures F1.8 let a lot of light in and allow you to take pictures in lower light situations and use faster shutter speeds while still getting decent exposure.

    Small apertures F8.0+ let less light in.

    Depth of Field: Another factor the aperture effects is the Depth of field of the image, this is distance in front of / behind the subject that appears in focus. A big aperture like F1.8 will have a very shallow depth of field an a larger aperture like F8.0 will have a much larger depth of field so much more of the image will be in focus.

    To make good use of it on your camera set it to Aperture Priority (Av) on the dial. Experiment with different apertures and the camera will automatically set the shutter speed to expose the image correctly.

    hope this helps.
    R
     
  3. Eddie_uv777

    Eddie_uv777 TPF Noob!

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    Anyone know where I can learn all this online?
     
  4. theRossatron

    theRossatron TPF Noob!

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    Um here? :)
     
  5. Gnome

    Gnome TPF Noob!

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  6. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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  7. RacePhoto

    RacePhoto TPF Noob!

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    As much as I don't like a site where anyone can publish their opinion of the "truth" here's a link that has a diagram.

    http://en.wikipedia.org/wiki/F-number

    You can find some good, but potentially confusing physics articles explaining the square root of 2 and all that.

    Real Easy.

    Small numbers = bigger opening = more light.
    Big Numbers = SMALLER opening = less light.

    It's a fraction. The portion of the lens that lets light in.

    Smaller denominator, bigger part of the whole. For example f/4 = 1/4 (it doesn't)
    Larger denominator, smaller part of the whole. f/16 = 1/16th (only for example, again)

    1/4 is 4 times larger than 1/16th
    Same math logic...
    f/4 is 4 times larger than f/16
     
  8. Groupcaptainbonzo

    Groupcaptainbonzo TPF Noob!

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    as well as being "HERE" the best way to learn about taking pictures is to go out and take as many as you can. Start on full auto, but see what settings the camera is using.. Then start to play with the settings yourself and see what happens. If you get any interesting things you wish to know, we are here all the time ,and just love helping people out.
     

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