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Thread: Often get this qn...

  1. #1
    Member HHenrYY's Avatar
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    Default Often get this qn...

    What does the mm means on lenses ?

    e.g 18mm-105mm or 55-200mm

    what is that ?
    i know the lower the number, the wider the view.
    how do i explain it ?
    and...
    how does it differ from compact's 1x 2x 3x .... zoom?

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  2. #2
    Moderator ziploc's Avatar
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    Default Re: Often get this qn...

    That is the focal length of the lens. For prime lens it will just be one number, e.g. 28mm. For zoom lens it will be a range, like 18-105mm. The focal length of the lens affect the field of view (FOV), and the longer the focal length, the narrower the FOV (and hence the image appear magnified).

  3. #3
    Senior Member ZerocoolAstra's Avatar
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    Default Re: Often get this qn...

    Quote Originally Posted by HHenrYY View Post
    What does the mm means on lenses ?

    e.g 18mm-105mm or 55-200mm

    what is that ?
    i know the lower the number, the wider the view.
    how do i explain it ?
    and...
    how does it differ from compact's 1x 2x 3x .... zoom?

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  4. #4
    Moderator ziploc's Avatar
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    Default Re: Often get this qn...

    The 5x, 10x etc zoom usually used in compact camera is just the ratio of the long end to the wide end of the zoom. So for example, a lens of 18-180mm is a 10x zoom (180/18=10). It is meaningless unless a baseline is know, in this example it is 18. So for a lens of 5x zoom and 35mm at the wide end, the zoom range is 35-175mm.

  5. #5
    Moderator Octarine's Avatar
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    Default Re: Often get this qn...

    Quote Originally Posted by HHenrYY View Post
    What does the mm means on lenses ?

    e.g 18mm-105mm or 55-200mm [...]
    More than 200 postings in photography forum and you haven't figured out what that means? Sounds a bit weird because it's the very very basics of any camera system. Wikipedia: Focal Length - do follow the links given there.
    EOS

  6. #6

    Default Re: Often get this qn...

    Quote Originally Posted by HHenrYY View Post
    What does the mm means on lenses ?

    e.g 18mm-105mm or 55-200mm

    what is that ?
    i know the lower the number, the wider the view.
    how do i explain it ?
    and...
    how does it differ from compact's 1x 2x 3x .... zoom?

    It would also help if you would read the Newbies guide to photography which is a sticky here. Your question is one of the most basic ones and is covered early.
    Alpha

  7. #7

    Default Re: Often get this qn...

    Quote Originally Posted by HHenrYY View Post
    What does the mm means on lenses ?

    e.g 18mm-105mm or 55-200mm

    what is that ?
    i know the lower the number, the wider the view.
    how do i explain it ?
    and...
    how does it differ from compact's 1x 2x 3x .... zoom?

    wah biang eh...

  8. #8

    Question Re: Often get this qn...

    Quote Originally Posted by tunge View Post
    wah biang eh...
    Hi I am new, what is the no. 1 thing I must know to take up photography as a hobby. Anything not too heavy in weight and price, thank you.
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  9. #9

    Default Re: Often get this qn...

    Quote Originally Posted by jesme chua View Post
    Hi I am new, what is the no. 1 thing I must know to take up photography as a hobby. Anything not too heavy in weight and price, thank you.
    The #1 thing? Your camera's manual. Other than that, you can read the newbies guides on here. Then you can shoot with your cellphone cam or even a simple compact, whatever you have handy and whatever you're comfy with.

    Also, please don't troll other people's threads.
    Last edited by Rashkae; 13th September 2009 at 08:55 PM.
    Alpha

  10. #10
    Moderator Octarine's Avatar
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    Default Re: Often get this qn...

    Quote Originally Posted by jesme chua View Post
    Hi I am new, what is the no. 1 thing I must know to take up photography as a hobby. Anything not too heavy in weight and price, thank you.
    No 1 thing? It is a hobby after all and should give you fun, pleasure, relaxing, distraction from the working days .. [fill in other achievements you might have in mind]. But like many other things in live: put your mind into it, learn what it needs to take pictures (technically but also in terms of aesthetics, art). Do you see any camera brand in my posting so far?
    Cameras are your tools, nothing more. Select the tool that you can afford (define your budget!) and that you can feel comfortable with (go and try them in the shops). The selection is up to you. All cameras can take decent pictures. Pictures get better if the person behind viewfinder knows a bit more than just pressing shutter button in Full Auto Mode.
    Define what is heavy, define what is your budget. Technical details come later and can be discussed once you open you own thread and come with specific questions. "What's the best camera?" does not qualify as one.
    EOS

  11. #11

    Default Re: Often get this qn...

    Quote Originally Posted by jesme chua View Post
    Hi I am new, what is the no. 1 thing I must know to take up photography as a hobby. Anything not too heavy in weight and price, thank you.
    wah ur this one short sentence question really asking for too much lah...

    u need to search around this forum, read the thread, google abit...

    meanwhile let's clear the misconception: you DO NOT NEED a DSLR to go into photgraphy as a hobby... if u absoutely know nothing, start w a PnS so u don't end up cracking ur brains or pulling out ur hair just to learn what each button/function works

  12. #12
    Member luntut's Avatar
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    Default Re: Often get this qn...

    Quote Originally Posted by jesme chua View Post
    Hi I am new, what is the no. 1 thing I must know to take up photography as a hobby. Anything not too heavy in weight and price, thank you.
    number 1 thing you must know, is not to blindly buy a DSLR without knowing what does ALL the markings on the camera or lens mean, especially when what does the MM on the lens denote.

    number 1 thing you must do, is to go read. and den go buy a POINT AND SHOOT, if all the things you are reading overwhelms you.
    Fast Camera. Fast Lens. Slow Me. Sigh.
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  13. #13

    Default Re: Often get this qn...

    The no. 1 thing is to read. Nothing to it.

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