Re: super 8 pinholes

From: Steve Polta (email suppressed)
Date: Wed Feb 24 2010 - 10:16:52 PST

This is indeed part of the fun of super-8 cartridge pinhole cameras. No shutter or drive mechanism in the cartridge means that the film is advanced by hand (and you also have to intervene in the cartridge's pressure plate to release the ratchet in the cartridge). In the sections in which the film is moving beneath the pinhole lens, it smears. When the film is not moving, the exposure is more-or-less still. The catch is that the image is in no way aligned or registered to any frames: the resolved images (such as they might be), are likely to cover maybe three or four frames, and even expose the usually-not-seen parts of the film, like the spaces between the sprocket holes. As objects, outside of projection, these can be wonderously odd things to behold. But don't expect to see frame-by-frame fidelity in projection. (But don't let that stop you either.) When projected, expect to see a lurching thing; do not expect realistic movement.

Not that I've ever done any of this. But I think I saw it on TV once.

Steve Polta

--- On Wed, 2/24/10, Roger Beebe <email suppressed> wrote:

> From: Roger Beebe <email suppressed>
> Subject: Re: super 8 pinholes
> To: email suppressed
> Date: Wednesday, February 24, 2010, 9:06 AM
> I'm confused
> about this.  Since there's no shutter, wouldn't
> this just produce a long blur across each frame?  Is
> there something magical in the super 8 cartridge that I
> don't understand?  (In my head I always assumed the
> movement was determined by the pull down claw in the camera
> [with a Maltese cross or some such], but does the cartridge
> itself do more than just advance the film steadily?)
> Anyone?Roger
> On Feb 23, 2010, at 10:48 PM, j.l.
> chouinard wrote:
> > i have heard of using super 8 by taking a cartridge,
> placing the pinhole over the film and turning it with a
> melted pin cap. never did it through. Has anyone on
> frameworks?
> > 
> the following info was brought to my attention by lindsey
> lodhie.
> _____________________
> Basic Pinhole Instructions: (please supplement with
> your own research)
> Crank should be on the left side w/ the film
> label on the right.  Turn crank clockwise to advance.
>  Each cartridge has 50ft and should release tension
> when finished.1 full revolution (one turn of the
> crank)= 46 frames (approximately)If you were to
> advance the film at 1 revolution per second, your shutter
> speed would be 1/46 of a second and projected at 18fps
> (standard super 8 speed) your footage would appear to be 2.5
> times slower than normal speed.If you wish to
> crank at "normal" speed you should advance at
> approximately 1/2 revolution per second.Remember
> that there's no shutter to either mask the motion of the
> film (producing motion blur) or block out part of the
> exposure time.Your fps will give you an effective
> shutter speed of 1/(fps)- for example  50fps will give
> you a shutter speed of 1/50 of a second.Using an
> analogue light meter, you should set your dial according to
> your footcandles as usual, but reference your f-stop first
> in order to determine your shutter.  This is the
> opposite of how you normally use a light meter.
>  Referencing the washer-fstop guide below, find your
> fixed aperture and the corresponding shutterspeed.  If,
> for example, your shutter speed says 1/125 of a second,
> you'll know to crank at a rate of 125 frames per second
> (about 3 revolutions per second).The easiest
> subjects to expose will probably be those with extremes of
> exposure (like a sunlit window in a dark room) because
> chances are, you'll expose some part of the image semi
> correctly.Keep in mind that nothing in pinhole
> filmmaking is exact and you should use this information to
> give you a good sense of your basic shooting
> parameters.(Also, if you're interested, you
> can try making pinhole lenses for the bolex using a similar
> method.)
> Aperture Guide:1 washer= f/3.33
> 2 washers= f/7.93 washers=
> f/10.594 washers= f/15.95 washers=
> f/21.16 washers= f/26.5
> Article from "AfterImage" about
> pinhole filmmaking:
> Hotmail: Powerful Free email with security by
> Microsoft. Get
> it now.__________________________________________________________________
> For info on FrameWorks, contact Pip Chodorov at <email suppressed>.
> __________________________________________________________________
> For info on FrameWorks, contact Pip Chodorov at
> <email suppressed>.


For info on FrameWorks, contact Pip Chodorov at <email suppressed>.