[LargeFormat] New Memeber introduction/Pinhole day comments
Jonathan King
largeformat@f32.net
Fri May 3 08:51:26 2002
On Thu, 2 May 2002 22:48:10 +0100, philip.lambert wrote:
>How does one mount a pinhole on a lensboard? Drill a moderate=
size
>hole and
>glue the pinhole base material over it? Would the glue when=
drying
>distort
>the pinhole?
I used an epoxy on a 35mm lens cap, and ruined one when the epoxy=
spread to the pinhole before it dried. Since then - duct tape. =
It
works very well on LF lens boards.
I have a picture of my latest board, as well as one of my=
'failure
pinholes' at http://webpages.charter.net/jking_nh/pinhole.jpg
An example photo from a cardboard box camera is
at http://webpages.charter.net/jking_nh/example.jpg
The camera had an aluminium pinhole made by an 11 year old.
~ 30 sec exposure with Polaroid 55 film.
>What exposure might be required for a sunny May day?
>Are we
>talking of half an hour or half a day?
A big advantage I see of converting a LF camera is the ease of=
using
film. I'm currently using Tri-X or Ilford Ortho+, & exposures=
range
from a couple of seconds to a minute or so for outdoor=
exposures.
I used the www.mrpinhole.com calculators as a starting point,=
then
added reciprocity factors from film data sheets.
> I looked at Achil's pictures
>and was
>so impressed I decided to junk all my German glass except for=
the
>305mm f9.
I agree!