Your asumption only works if E-1 is a B/W camera and without low pass filter
on surface of CCD, otherwise you have to devide the total pixel count by 2.
I agree the 90/2 is not very good at close up but it has very high
resolution at lower mag. At a sunny day (high enough shutter speed and
optimised aperture) and with a reasonable good lens, it is easy to get a
shoot better than a 6MP digital camera (in resolution). I have some scans on
my son's negatvie taken from the Europe trip, his OM2n and Zuiko 35-105 gave
some very sharp shots that make me remember 12 years ago I visit the same
place with some very nice pictures taken with same lens (same version but
different one).
Of course E-1 is very acceptable otherwise I will not use it for most of my
works today.
C.H.Ling
----- Original Message -----
From: "Wayne S" <om4t@xxxxxxxx>
>
> Let's see. If we crop a 36x24 frame to 4/3's we get 32x24mm.
> If we assume 50lpmm resolution (averaging center and corner)
> we get something like (assuming ideal nyquest sampling)
> 100x32 x 100x24 = 7.7megapixels. Or the reverse: 2560x1920
> E-1 image 2560/32 = 80 or 40lpmm. We're really not that far
> away (50lpmm for film, 40lpmm E-1, in the ideal).
>
> Now if we take the 21/2 at 80lpmm center we would need:
> 160x32 x 160x24 = 19.6 megapixels (whoa) No wonder CH's
> comparison using the 21/2 against the E-1. Now you factor in
> all the crumby scanners out there and maybe you get 12mp?
> (Data taken from http://homepages.caverock.net.nz/~bj/zuiko/index.htm )
>
> The lpmm (line pairs per mm) goes as the square root of the
> pixel count or pixel count goes as the square of resolution (lpmm).
>
> Conclusion: The E-1 can be very acceptable, as well as fun. How
> many shots do you take that actually gets better than 40lpmm?
> (CH don't answer that, we already know :-) And look at the 90/2
> close focus data...
>
> Wayne
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