Joel,
A bit late, but I knew that I had some of this info around, I just had
to look for it. This chart lists some half frame lens focal lengths and
their full frame 35 mm equivalent.
Half Frame mm Full Frame mm
20 28
25 35
38 55
40 58
42 60
50 70
60 85
70 100
90 130
100 143
150 210
200 286
250 360
400 580
800 1150
Rand E.
"Keith (R.K.) Berry" wrote:
>
> From: joel2@xxxxxxxxxx Subject: [OM] Looking For Info on Pen System
>
> >Anyway I'm assuming since the pen takes half frame pictures that the
> reduces negative size has an effect on focal lengths. A 250mm for example
> would become a 500mm (35mm equivalent) for example and as a result not just
> the camera would be compact but the entire system >would tend to be smaller?
> So that whooping big 800mm that was made for the Pen should be equal to a
> 1600mm in standard full frame 35mm format? Correct me if I'm wrong on that
> score.
> >
> No, it's nothing like double. For an 8 x 10 print a full frame negative has
> to enlarged 8 times - a half frame negative has to be enlarged only 11
> times, not 16, so the ratio is around 8:11
> Regards,
> keith_r.k.berry@xxxxxxxxxx
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