Hey, everyone! I'm new; can you help me out?

Discussion in 'Welcomes and Introductions' started by DRB022, Jul 4, 2009.

  1. DRB022

    DRB022 TPF Noob!

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    Hello from Texas!

    So I've had an interest in photography for a while, but I haven't really looked into it all that much until just recently. I just got my first DSLR last Saturday after using compact digital "point and shoot" cameras for years. So now it's been one week since I officially started and I feel like I've made pretty good progress. I have a pretty good grasp on ISO, shutter speed, where to position flashes and I know my camera like the back of my own hand.

    But I have to confess, I can't seem to get a handle on aperture. I just don't see how it works. It seems like it's not very different than ISO. Both things (ISO and aperture) seem to control the contrast of the picture. Like when I use a large aperture, the picture looks really bright. When I use a small one, it looks really dark. I thought that ISO was supposed to take care of that stuff. Also, everywhere I look on the internet it says that shutter speed and aperture go hand-in-hand. How's that?

    So if anybody could straighten me out a little on ISO and aperture, that would be great. Thanks a lot!
     
  2. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    ISO changes the light sensitivity of the sensor ... ie high ISO is used for very low light.
    When you increase the ISO, it allows you to use higher Shutter speeds or smaller Apertures. Increasing the ISO also increases the noise level induced by the sensor ... so it is best not to increase it.

    Shutter speed and Aperture control the amount of light hitting the sensor.
    Either do not directly affect contrast.
    Both Shutter speed and Aperture have unique properties that will affect the image.
     
  3. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Exposure = Shutter Speed + Aperture

    Faster Shutter Speed = smaller Aperture = lower exposure
    Slower Shutter Speed = wider Aperture = higher exposure
     
  4. xmaxonx

    xmaxonx TPF Noob!

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  5. DRB022

    DRB022 TPF Noob!

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    So aperture lets in a certain amount of light and ISO controls the sensitivity of the camera to that light?
     
  6. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Correct.

    Shutter speed is also used to control the amount of light.
     
  7. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Aperture also affects the depth of focus (field).
    Shutter speed affects the visualization of motion.
     
  8. DRB022

    DRB022 TPF Noob!

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    Alright I think I get it now. Are there any specific f-stops to use for different settings or should I should I just fiddle with it until I get something that looks good?
     
  9. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Smaller aperture increase's the Depth of Field (focus area) ... so if you need more foreground and background in focus, use a smaller f-stop.

    If you want the background out of focus then use a wider f-stop.

    Other than that, you would use any f-stop ... though smaller f-stops require you to slow the shutter speed to compensate.
     
  10. DRB022

    DRB022 TPF Noob!

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    Alright. Thanks so much for your help!
     
  11. Nicholas James Photo

    Nicholas James Photo TPF Noob!

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    Welcome to TPF - I think others are covering your questions
     

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