Viewfinder specs...


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denizenx

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Feb 1, 2002
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#1
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?
 

LittleWolf

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Jan 23, 2005
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#2
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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