results from a roll film pinhole

[rjjackson]

i thought i would share the results of a prototype pinhole using a medium format

back.

<br>

<br>my first objective was to make a lens-board/housing unit to mount on top of

the film back. then i decided to make a tripod mount using an old saliut body,

cut in half.

<br><br>

using the pinhole designer from pinhole.cz, i created a focal length of 26mm,

giving about 120 degree angle of view. i also added about 7mm of vertical

shift. on the inside of the lens board, i added a fixture for 37mm filters i

had lying around that dont' seem to fit any of my cameras.

<br><br>

i had some light leaks in my first roll, solved when i added the body housing.

next i'm working on a way to mount the lens board directly to the body, but

first i need to find an aluminum welder. the stares i get from this are quite

different from setting up my hasselblad. any tips welcome :)

<br><br>

here's a picture of the camera:

<br>

<img src="http://rjjackson.com/images/img/pinhole_2.jpg">

<br><br>

and some examples:

<br>

<br><img src="http://rjjackson.com/images/img/fi_00926.jpg">

<br><img src="http://rjjackson.com/images/img/fi_00933.jpg">

<br><img src="http://rjjackson.com/images/img/fi_00930.jpg">

<br><img src="http://rjjackson.com/images/img/fi_00932.jpg">

<br><img src="http://rjjackson.com/images/img/fi_00915.jpg">

[ken munn]

Huge fun!

[franklin_h1]

Wonderful ..looks like we have a winner

 

i've been playing with a camera called a Cinelarger for pinhole, i bought it not knowing what the heck it was, have since found out it was originally used to make still enlargements on 120 film from 8mm movie films.

Now ready to make the pinhole, what material did you use and how did you make the hole? just a pin?<div></div>

[rjjackson]

ken and franklin, thanks for the comments.

 

franklin, wow, that thing is strange.

 

for the hole itself, i used a segment from a beer can. i first sanded it down to be as thin as possible without bending it. i then placed the metal down on some cardboard and tapped the pin through the tin until it just barely poked through, so i just barely could feel it. then i sanded off the bur, and finally under a loupe rounded the hole off again. this took me a few tries to get something both close to what i though to be the right size for my focal length (.223mm) and evenly round.

 

i think if you put a pinhole in front of the cinelarger, you will have a telephoto angle of view, maybe something like a 100 mm lens. good luck. there are lots of resources on the web for tips and such.

[patrick j dempsey]

Beautiful images and beautiful camera! The vertical shift is interesting... does that just move the central focus of the image up on the neg to make a less symmtrical image?

 

Franklin, the longer the focal length, the larger the pinhole needs to be, and the longer the exposures will be... expect motion blur in trees and water! The downloadable program from pinhole.cz is a great great resource. Your camera will be beautiful! It reminds me of a deco version of the Polaroid Big-Shot!

[franklin_h1]

Thanks for the info Patrick,

 

i'm thinking of leaving the camera length as is to start with and see how the images are, i might end up lopping the whole front part off and fastening a lens board similar to Roberts camera, will see how it goes.

[LMar]

Cool photos and a cool camera --- it's a Pinholeblad!