[MF3D.FORUM:41] Re: Apparent image size Part 2

[Alan Lewis <3-d@xxxxxxxx>]

I've been doing more calculations and thinking on apparent image size
vs. format size.

I did some calculations similar to Pauls', then tested some of them out
with real viewers (I have lots of viewers).  

I assumed for fair comparison's sake that all calculations would be
based upon the full format size (not mount mask size) and the viewer
having the same f.l. lenses as the camera.  This is just a starting
point.

After all was said and done it appears that no format has a clear
advantage on WOW factor based upon magnification alone. If all viewers
used the same lenses as the camera (the "normal" f.l. lens that is) then
the magnification differences would be hardly noticeable (IMHO).

So what gives the WOW effect?  Well, certainly apparent image size can;
as can image clarity.  (Along with good composition, good subject
matter, etc.) Also, I feel that using a square format will maximize the
coverage area of a round lens.  You will probably feel more immersion
with a square format vs. a rect. format.

I would venture to say that to get the best WOW effect you should choose
a format size that will give a minimum of grain showing, then use the
shortest f.l. viewer lenses that you can manage to find. But remember
that you will most likely not see the entire image.  It will be almost
impossible to find short f.l. lenses that will cover the entire image. 
It is hard enough to find "ortho" lenses that will.

Usually lenses are easier to find for this purpose as you go up in
format size.  In the full frame 35mm and Realist sizes it is difficult
to find good short f.l. lenses.  In MF and larger formats it is easier
to find lenses that will work.

It will help too to maximize the final size of the stereo mount mask so
you are viewing as much of the frame as possible.  But setting the
proper stereo window limits this size.

-- 
Alan Lewis  
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