Re: 5p vs. 7p

[P3D John Bercovitz <bercov@xxxxxxxxxxx>]

Gabriel Jacob writes

>> Now Gabriel of course will soon give us an 80 mm fl stereo
>> camera using 35 mm film and having 57 mm image width because 
>> he likes his stuff . . . .  W   I   D   E . . . . 
>> More power to 'im.

> I knew I should have made you sign a non-disclosure agreement
> when I gave you my ideas. There goes my patent plans. ;;;-)

Oh drat!  I've spilled the beans again.  (In all seriousness,
57 width and 80 mm lens is normal in MF stereo.  Compare to 
21.4 or 28 width with 44 or 50 mm lenses in a miniature format 
viewer.)

> I think in lens theory they describe this magnification 
> correctly when they mention magnification actually makes things 
> look closer and not really bigger. Is this correct or am I all 
> wet and mixed up something here? 

Grab a towel.  ;-)  With magnification you can make your eyes 
focus close or far depending on how far you set the magnifier lens 
from the transparency.  I personally set it so that the (virtual) 
image is at infinity.  This is most comfortable for me.

John B


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