aperture under ten words

Discussion in 'Photographic Discussions' started by mysteryscribe, Dec 20, 2006.

  1. mysteryscribe

    mysteryscribe TPF Noob!

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    opens and closes to constrict the flow of light
     
  2. mysteryscribe

    mysteryscribe TPF Noob!

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    since this is sesame street for photographers you know it all has to come together soon... Is there a song writer in the house
     
  3. fmw

    fmw No longer a newbie, moving up!

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    Size of light hole.
     
  4. mysteryscribe

    mysteryscribe TPF Noob!

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    faucet for light....

    yes laying the groundwork...
     
  5. kwjones

    kwjones TPF Noob!

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    Determines depth of field
     
  6. danalec99

    danalec99 TPF Noob!

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    the hole
     
  7. craig

    craig TPF Noob!

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    Smaller the hole better the focus.
     
  8. ZyxKor

    ZyxKor TPF Noob!

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    I don't understand how that works. I understand that you let less light in but I can't seem to understand why you get better focus with it. I know it's true but I don't understand the science behind it.
     
  9. mysteryscribe

    mysteryscribe TPF Noob!

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    its like a faucet open it wide and the water sprays out.... shoot it through a tight hole and it come out in a tight streem. Light is like that a million times over. It hits everywhere overlapping though a big hole but is more focused through the small hole so it makes very sharp lines. That's how it has always be explained to me.
     
  10. THORHAMMER

    THORHAMMER TPF Noob!

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    everything in photography is give and take, light management, tradeoffs....

    gain here and lose something there.

    Learning how and when to pick your battles. sometimes you can easily win without trying... sometimes the odds are stacked against you..
     
  11. mysteryscribe

    mysteryscribe TPF Noob!

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    Some battles are worth fighing even after you know they are lost. Ah but we slide into politics now lol.
     
  12. Alex_B

    Alex_B No longer a newbie, moving up!

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    you increase your depth of field. that is all. if your subject of the image is not well focussed, deep depth of field can help to still make it look sharp ... but that does not bring it into better focus ... focus is still off, just you dont realise since it is sharp ;)

    as for th the easy explanation, the smaller your opening, the closer it gets to a pinhole. for a pinhole, lenses don't matter, it is always in focus for all subject distances. so the closer you get to that pinhole, the more depth of field you get.

    if it gets very small though, diffraction becomes an issue, this plus the still finite size of the hole prevent the image to be ultra sharp in the end.
     

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