Re: Tesla Coil Photography

Terry, you might already know this but the "longer" a lens you use, the
more light that will be required to get the same brightness (ie you'll
need to increase exposure time if you keep everything else the same).


Tesla List wrote:
> Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> Hi All,
> Many thanks for all the fine and detailed information on how to setup a
> camera for Tesla coil photos.  I had too slow of film, not enough aperture,
> and probably not enough exposure time.  I will go to ASA 400 film at f1.4
> and run through a bunch of different timings form 1 sec to 16 seconds which
> should pin down my situation well.
> Apparently, if the room is dark, the exposure time only determines how many
> streamers are captured.  The film speed and aperture really determine how
> bright the sparks are in the photo.  Thus, you can get a few streamers or
> many depending on how long the exposure is.  I never realized this before...
> Since I am a bit far away from the coil (15-20 feet) I will go for larger
> apertures to be SURE something gets captured.  The exact streamer
> brightness and distance play into all this too, so some trial and error is
> still needed.  However I will now be pretty close to begin with.
> I'll switch to my older Minolta XE-1 which has double exposure capability,
> longer preset exposure times, is made of solid metal, and is "expendable"
> :-)  It has a minor light metering problem but that does not mater in this
> case.
> Many many thanks for all the help!
>         Terry