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Thread: What do the numbers mean?

  1. #1
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    Default What do the numbers mean?

    Hi guys ( and gals )

    Just want to ask.. Each time I read about some article mentioning a certain camera, there is always this number thingy ( xx - xxxmm ) followed by f/X. I think the f thingy is the aperture size right?
    so what do the other one with a range mean? is it the lens? what is the significance of the number?
    Someone pls enlighten me. Thanks.

  2. #2
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    Default Re: What do the numbers mean?

    example: canon EF 75-300mm f4-5.6 III usm
    mm is the focal lengh 75 is the widest and 300 is the telephoto end.
    the f is aperture.f4-5.6. at 75mm its f4 and 300mm its f5.6.
    its like from end to end.

  3. #3
    Senior Member zac08's Avatar
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    Default Re: What do the numbers mean?

    Quote Originally Posted by KiamH View Post
    Hi guys ( and gals )

    Just want to ask.. Each time I read about some article mentioning a certain camera, there is always this number thingy ( xx - xxxmm ) followed by f/X. I think the f thingy is the aperture size right?
    so what do the other one with a range mean? is it the lens? what is the significance of the number?
    Someone pls enlighten me. Thanks.
    You're talking about camera (point and shoot type) or lenses?

    If lenses, then noob117 has pointed it out for you. But on a PnS, the lens focal length is an estimated comparision to a 35mm format as the sensor size on a PnS is much smaller and the actual focal length is different.
    Michael Lim
    My Flickr Site

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    Default Re: What do the numbers mean?

    Thanks or the reply.

    So, what makes a camera good?
    does it mean that the wider the range of the focal length, the better it is??
    and does it mean that a huge difference in aperture size equate to a good camera also?

  5. #5
    Senior Member zac08's Avatar
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    Default Re: What do the numbers mean?

    Quote Originally Posted by KiamH View Post
    Thanks or the reply.

    So, what makes a camera good?
    does it mean that the wider the range of the focal length, the better it is??
    and does it mean that a huge difference in aperture size equate to a good camera also?
    A camera is good when it can take wonderful pictures.

    Honestly speaking, it all depends on your usage, there is never a BEST camera, else it would have outsold everything else on the market....
    Michael Lim
    My Flickr Site

  6. #6

    Default Re: What do the numbers mean?

    Quote Originally Posted by KiamH View Post
    Thanks or the reply.

    So, what makes a camera good?
    does it mean that the wider the range of the focal length, the better it is??
    and does it mean that a huge difference in aperture size equate to a good camera also?
    Bro, a camera is only as good as the photographer. It all depends on what you want to achieve and your budget. Longer focal length allows you to take shots from a greater distance, while the short focal length allows you more control of your subject and gives your picture a more nature depth.

    Cheers

    Kelvin
    EOS 6D|EOS 50D|EOS 350D|EF-S 17-85mm|EF 24-70mm|EF 70-200mm|EF 50mm f/1.8|Sigma 70-300mm

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    Default Re: What do the numbers mean?

    May I humbly suggest that you go read some artilce about basic photography. You need to understand the whole concept and not just about one aspect of it. The aperture, shutter speed, ISO etc all works in relation to each other.

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    Default Re: What do the numbers mean?

    Sorry to use this link from Canon. Not promoting or anything ...

    Go to: http://web.canon.jp/Imaging/enjoydslr/index.html

    I believe this is kinda useful for a starter to learn abt the focal length, Depth of Field, Aperture and so on...
    Last edited by yZong; 22nd October 2006 at 10:02 AM.

  9. #9

    Default Re: What do the numbers mean?

    Quote Originally Posted by KiamH View Post
    So, what makes a camera good?
    In my opinion, all cameras are good for its intended purpose.

  10. #10
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    Default Re: What do the numbers mean?

    Thanks to all for taking your time in educating me on photography. Appreciate it.

  11. #11
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    Default Re: What do the numbers mean?

    Quote Originally Posted by student View Post
    In my opinion, all cameras are good for its intended purpose.
    And the user?

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