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  1. #1
    Join Date
    Jan 2005
    Location
    Urban Gristle Mill
    Posts
    142

    What is the 4/3 system?

    Hi All,

    A friend of mine has always liked Olympus cameras and lenses. I'm considering a dSLR and the front runner right now is the Canon EOS-20d.
    I'm intrigued by the Super Sonic Wave filter technology of the Olympus, and also by the fact that Olympus (while a very respected name) often isn't mentioned in the "top two" when I ask people their opinions of what dSLR I should buy.

    One thing I don't understand at all is the 4/3 system. I assume this is some sort of ratio expression, but of what to what? Any information would be certainly appreciated.

    Thank you.


    ---------------------------------------------------------
    Amateur Photographer
    Nikon D70s
    Nikkor 50mm f/1.8
    Nikkor 18-70mm f/3.5
    Canon PowerShot G2


    I need new ways to interpret things. Photography gives me new interpretations.

  2. #2
    Join Date
    Oct 2004
    Location
    Aberdeenshire, Scotland
    Posts
    346
    Take a look here

    This should help
    Olympus E-3 | Olympus E-1 | Olympus 14-54mm f2.8-3.5 | Olympus 50mm f2.0 Macro | Olympus 50-200mm f2.8-3.5 | Olympus FL-50R Flash

  3. #3
    Join Date
    Jul 2004
    Location
    Formerly South Wales. Now South Carolina.
    Posts
    7,147
    Quote Originally Posted by Jim Last
    Take a look here

    This should help
    Very interesting - who owns that site? I see the company through which it was registered listed. I do not see who owns the site though. That, to me, destroys the value of anything on that site.

    Domain Name: FOUR-THIRDS.COM
    Registrar: GLOBAL MEDIA ONLINE INC
    Whois Server: whois.discount-domain.com
    Referral URL: http://www.discount-domain.com
    Name Server: NS.PPP.NET
    Name Server: NS.PPP.DE
    Status: ACTIVE
    Updated Date: 24-jul-2003
    Creation Date: 23-aug-2002
    Expiration Date: 23-aug-2006
    >>> Last update of whois database: Wed 12 Jan 2005 19: 24: 34 EST <<<

  4. #4
    Join Date
    Aug 2004
    Posts
    71

    What is the 4/3 system

    The 4/3 system is built around a different hight to width ratio that most other dSLRs. The most common ratio is 2:3, which results in print sizes that are 4x6, 8x12 and so forth. The 4/3 system is closer to the ratio of medium format cameras. There are a number of reasons Olympus chose to use that ratio, (the primary one being that the light is supposed to strike the sensor more evenly), all of which you should be able to find on the Olympus website.

    Best regards,
    Jay Kinghorn
    RGB Imaging

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