Looks like a point for the sought B-28 and B-300 converters...
BTW I thought we wanted precisely that track, that is the flavour of
meteors, isn't it?
Marco
----------
>Da: "Tom Trottier" <infoanim@xxxxxx>
>A: olympus@xxxxxxxxxxxxxxx
>Oggetto: [OM] Meteors & stars
>Data: Mer, 24 mar 1999 20:39
>
> My understanding of very-infinity photography (stars) is that what matters is
> the effective lens opening. Since the subject is effectively a point source,
> the light intensity isn't diluted by the magnification effect of longer
lenses.
> So a lens that is 25mm f/2 (12.5 opening) would create the same image as a
> 50mm at f/4 or 100mm at f/8.
> Unfortunately, meteors move, so the longer the lens, the longer the track and
> the more dilute the image.
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