#Tag · BT Free Social

Putting the first few sheets of 4x5 FPP Frankenstein through a pinhole camera I made from a tubular cardboard old fashioned oats container. I calculated the f-stop to be a bit over f500 so metered for this and after some adjustments to fix light leaks I started getting some reasonable images. It is notable that vignetting on the image is almost imperceptible due to the curved film plane.

Some images of the camera and the build can be found here
https://fosstodon.org/@rho/111021197786289951

#pinhole #FilmPhotography #LargeFormatPhotography

Grainy black and white 4x5 photograph of an aloe.
I don't have a scanning setup for 4x5 so the camera scan is a little rough. — Grainy black and white 4x5 photograph of an aloe. I don't have a scanning setup for 4x5 so the camera scan is a little rough.

penumbra

@penumbra@fedi.electro.pizza · 2 days ago

rho

@rho@fosstodon.org · 2 years ago

I've had my eye on this old tube of Oats for a while, thinking it may make a decent #pinhole camera.

I wanted to try and position the pinhole at the focal point of the circular arc formed by a curved film plane. In that way, focal length will remain the same across the sheet of film; widening the angle of view and reducing vignetting.

#believeinfilm #photography

Two halves of the cardboard tube interlocked to form the rounded back of the camera body.
A film sleeve has been fashioned from off cuts of the cardboard tube, and glued into a centered position to the inside of the camera body. A 4x5 sheet of film is being held by the sleeve. — Two halves of the cardboard tube interlocked to form the rounded back of the camera body. A film sleeve has been fashioned from off cuts of the cardboard tube, and glued into a centered position to the inside of the camera body. A 4x5 sheet of film is being held by the sleeve.

Initial cuts of the cardboard tube. It has been split horizontally across the cylinder, then the bottom portion split in half vertically.

A sacrificed sheet of 4x5 film sits inside of one of these halves. — Initial cuts of the cardboard tube. It has been split horizontally across the cylinder, then the bottom portion split in half vertically. A sacrificed sheet of 4x5 film sits inside of one of these halves.

Grid lined paper with sketches of what a curved film plane pinhole camera may look like if made from a halved tube.

I include this for the diagram illustrating that the focal length will remain the same across the film plane if the pinhole is placed at the focal point of the curve formed by the film. — Grid lined paper with sketches of what a curved film plane pinhole camera may look like if made from a halved tube. I include this for the diagram illustrating that the focal length will remain the same across the film plane if the pinhole is placed at the focal point of the curve formed by the film.

rho

@rho@fosstodon.org replied · 2 days ago

Oathole! Over 2 years later I somehow returned to this 4x5 pinhole project. Stumbling on it while cleaning, I realized it wasn't far off from completion so grabbed some gaffer tape and took it across the finish line.

#pinhole #pinholephotography

Cover fully on the base with the pinhole visible. Effectively open shutter position.

Cover partially slipped on the base demonstrating how it can act like a shutter.

Cover and base separated. Black gaffer tape is covering all seams.

rho boosted

Petr Klosko

@klosko.net@bsky.brid.gy · 6 days ago

Petr Klosko

@klosko.net@bsky.brid.gy · 2 weeks ago

I took this #pinhole off the fence today. After 365 days #longExposure exactly! I can't wait to scan it. #StayTuned...

And here it is. Little bit (by the water) damaged #photopaper, but still nice. 365 days #solargraphy taken by #beerCan #pinhole #photography @stormhour.com@bsky.brid.gy @photohour.bsky.social@bsky.brid.gy #longExposure #ShittyCameraChallenge

RE: https://bsky.app/profile/did:plc:ttuhp7xvfjkoqkkfr3urwfzl/post/3mawbrbgh7k2x

RE: https://bsky.app/profile/did:plc:ttuhp7xvfjkoqkkfr3urwfzl/post/3mawbrbgh7k2x

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Petr Klosko

@klosko.net@bsky.brid.gy · 6 days ago

Petr Klosko

@klosko.net@bsky.brid.gy · 2 weeks ago

I took this #pinhole off the fence today. After 365 days #longExposure exactly! I can't wait to scan it. #StayTuned...

RE: https://bsky.app/profile/did:plc:ttuhp7xvfjkoqkkfr3urwfzl/post/3mawbrbgh7k2x

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