From: Tony Conrad (email suppressed)
Date: Tue Feb 23 2010 - 07:59:40 PST
f/-stop numbers don't have any units (dimensionless)
On Tue 02/23/10 10:35 AM , James Cole email suppressed sent:
> Any units for that?
>
> On Tue, Feb 23, 2010 at 10:23 AM, Tony Conrad wrote:
> The f-stop (f/) of a pinhole can be calculated from its diameter (d)
> and the
> distance from the pinhole to the film (D):
> f/ = D/d
> -----------t0ny
> On Tue 02/23/10 8:47 AM , David Woods sent:
> > It's "T".
> >
> > The cleanness of the pinhole edge is of some importance; I tended
> to
> > go for aluminium foil as the light barrier, and a nice punched
> hole
> > which I checked with a magnifying glass before attachment to a
> > modified de-glassed lens.
> >
> > Good luck
> >
> > David
> > FROM: Experimental Film Discussion List
> > [mailto:] ON BEHALF OF mat fleming
> > SENT: 23 February 2010 12:54
> > TO:
> > SUBJECT: Re: Help!
> > I've had some success with black wrap over a lens adaptor.
> > If you don't have the luxury of testing exposure you can test
> at the
> > processing stage if you self process. Of course you need plenty of
> > light. Shoot slow and in the sunlight if you can.
> > Another thing you can do is look at the image through the pinhole
> > from the back with tissue paper in the gate to check what kind of
> > field of view you have. It's fiddley and you either need the
> camera
> > running or you have to turn the little knob near the speed control
> to
> > "T" - or is it "I"? in order to be able to hold the shutter open.
> > Mat.
> >
> > On Tue, Feb 23, 2010 at 12:26 PM, miriam jayne martins sampaio
> > wrote:
> >
> > Dear all
> > wondering if anyone can give me some info on 16mm pinhole
> > filmmaking? (with a bolex)
> > thanks
> > miriam
> > -------------------------
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> > For info on FrameWorks, contact Pip Chodorov at .
> > __________________________________________________________________
> > For info on FrameWorks, contact Pip Chodorov at .
> >
> > __________________________________________________________________
> > For info on FrameWorks, contact Pip Chodorov at .
> >
> >
> >
> > Links:
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> >
> >
> __________________________________________________________________
> For info on FrameWorks, contact Pip Chodorov at .
> __________________________________________________________________
> For info on FrameWorks, contact Pip Chodorov at .
>
>
>
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>
__________________________________________________________________
For info on FrameWorks, contact Pip Chodorov at <email suppressed>.