backside of the 5 x 7 Cinco-Seven pinhole camera

Here's a view of the back of the 5 x 7 Cinco-Seven pinhole camera I built.
I epoxied rare-Earth (neodymium) magnets in the back and the camera box.  The magnets are recessed into drilled holes and fit perfectly.

It works great and there's no fiddling around with elastics, bungee cords, latches, or dowels or pins to hold the filmholder in place.

The super magnets hold strong, so I'm very pleased with this design and will probably build all my pinhole cameras like this from now on....

Enjoy!

First test shot...

This is my first test shot with the homemade Cinco-Seven pinhole box.
This is a Harman Direct Positive paper photo exposed for 2 minutes and then sloshed in home brew caffenol for about 4 minutes.

I like having a 5 x 7 positive right out of the soup!  More to come....

another camera in the making....Cinco-Seven

I'm making a 5 x 7 pinhole camera and wanted to share a shot of it before it gets too much farther along.

I'm making it out of some plywood scraps in my wood shed/workshop and hope to have it finished by the end of next week and early enough to practice a few shots with before World Pinhole day rolls along..

It will be about f/250, with a depth of 4.5 inches.  This should give me an exposure length of about 90 seconds for Harman Direct Positive paper, and about 4 seconds for ASA 100 film.

Anyway, a couple of thoughts came to mind today during construction:

I really wish someone made spray on felt...in black of course!

Cookie dough looks just like wood filler...dare I say I used cookie dough today to fill a hole in a void in the plywood!

You can NEVER have enough clamps.

Sanding surfaces smooth is my least favorite part of woodworking.

My router scares the bejeebies outta me.

I can still hear the phone ring over the sound of the table saw.

I wish tripod sockets/inserts came pre-installed in boards.

An emery board works great as a fine file in tight spots.

I still have all my fingers!

Here's a shot of the camera so far.

Mr. Bob's Place

Mr. Bob's is just up the road a ways on Route 66.  It's home to a bunch of old cars and vintage "stuff".  You just never know what's going to be parked in this yard, so I drive by often just to see what's going on....

This Palomino pinhole image was made on some Arista multigrade photo paper.  The exposure was 60 seconds long and then dunked in caffenol for 4 minutes or so.  I develop by inspection, so sometimes it takes more dunking than other times, but 4 minutes usually does the job.