On 2006-06-26 19:29, John Francis wrote:
> Put an MX and a *ist-D up, side by side, one to each eye (you'll
> have to do that with the cameras in portrait position), each with
> a 50mm lens fitted, and objects seen through the two viewfinders
> *will* appear to be the same size (and will appear just a little
> smaller than you would see with the naked eye).  It's just that
> the MX will crop to one rectangualr portion of the total field
> of view, while the *ist-D will crop to a somewhat smaller one.
> 
> Most viewfinders, in fact, try to present their image at an
> apparent distance of around 1m from the eye.  So if you imagine
> a wall about 1m in front of you the MX viewfinder (with a 50mm
> lens) is just about like looking through a rectangular 30" x 20"
> window in that wall, while the *ist-D viewfinder (with the same
> 50mm lens) is like looking through a 20" x 13.3" window.  But
> in each case the objects, as seen through those windows, are the
> same apparent size.  

Thanks for the clarification. I now understand better what magnification
means. I did not expect that what you see in the viewfinder of a DSLR is
that much smaller than the image of a full frame. Some people do consider
this as an advantage. Personally, I thought the wider, the better, as long
as you will see the full image. Former SLRs where a good setup for me.
'tunneling' into a DSLR was an effect that I expected more from the mirror
viewfinders (Olympus 4/3rds), while I now feel it's directly linked to the
sensor size. But I expected 1:1.5 magnifcation of the viewfinder before
(comparing SLR:DSLR).

- Martin

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