[MF3D.FORUM:62] Re: diagonals

[Alan Lewis <3-d@xxxxxxxx>]

Tloc54452@xxxxxxx wrote:
> 
> Diagonals can lead you astray if the foramt is far from square.
> For instance, a 24x80 panoramic has a diagonal of 83 but so does
> a format which is 59 square.  You might say that 24x80 has 1920
> square mm of viewing area while the 59x59 has 3481 but it's worse
> that that: a lot of the 24x80 panoramic is viewed at quite a slant
> so the outer edges don't count as much.  I think the way to gauge
> formats is going to be by solid angle but I don't know how to
> figure it...yet.

The interesting thing about all this analysis so far is that it actually
works in the real world.  I look at all the ways we have done
calculations to compare the formats, then I start setting up my viewers
for many of the lens/format recommendations to see if the actual results
match the calculated results.  I'm lucky in that I can set up many of
the formats and lens combinations, and then superimpose them to
interpret the result.

Although our analysis so far hasn't been scientific, it appears to be
quite accurate in relating to what will actually happen.  I have a much
better understanding of how the formats relate to each other when
magnified.

-- 
Alan Lewis  
mailto:3-d@xxxxxxxx
http://members.home.net/3-d
Serious viewers for Serious viewer's
New stereo viewers & Stereo Wedding Photography