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Thread: Viewfinder specs...

  1. #1
    Senior Member
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    Question Viewfinder specs...

    Was looking at some DSLRs...
    The olympus e410 SLR has 95% FOV and 0.95x mag and the Sony a200 has 95% and 0.86x mag on paper but the latter is quite obviously bigger (side by side comparison).

    so my question is -- the 0.86x value is a multiplier of the subject or the sensor?

  2. #2
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    Default Re: Viewfinder specs...

    Quote Originally Posted by denizenx View Post
    Was looking at some DSLRs...
    The olympus e410 SLR has 95% FOV and 0.95x mag and the Sony a200 has 95% and 0.86x mag on paper but the latter is quite obviously bigger (side by side comparison).

    so my question is -- the 0.86x value is a multiplier of the subject or the sensor?
    The SLR viewfinder forms a simple telescope. The magnification of a telescope is determined by both the objective lens and the eyepiece.

    Viewfinder magnification specs are always referenced to a given lens (typically 50mm lens, focused at infinity). You cannot compare viewfinder (eyepiece) magnifications unless you use similar objective lenses (i.e. identical focal lengths).

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