[MF3D.FORUM:55] Re: Apparent image size, MF verus

[Michael Kersenbrock <michaelk@xxxxxxxxxxxx>]

One also perhaps could add viewmaster format and with the 
appropriate viewer Mag come out to 250.00 Apparent size as
well.  How close does the available 12x Dukes viewer come?

Mike K.

Alan Lewis wrote:
> 
> I've modified Paul's very good table again, using the ideal situation
> where the full frame size is used for apparent size comparison vs.
> diagonal measurement.  I keep doing this because the mask size is a
> mechanical limitation applied by the limitations of equipment.  To first
> understand the relationships between formats I like to isolate the
> variables to see where the problem first occurs.
> (BTW: Paul's use of this table idea is working very well.  We all see it
> in our own way, none of them necessarily the final word, just a tool).
> 
>  Format     Size       Diag      Viewer Mag       Apparent size
>  ------     ----       ----      ----------       -------------
>  5P         23 x 24    33.24     7.52 (250/diag)    250.00
>  7P         24 x 30    38.42     6.51 (250/diag)    250.00
>  MF         60 x 60    84.85     2.95 (250/diag)    250.00
>  3Disc      24 x 36    43.27     5.78 (250/diag)    250.00
>  6x7        60 x 70    92.20     2.71 (250/diag)    250.00