Questions tagged [pinhole-cameras]

A camera that uses a tiny ("pinhole") aperture in a light screen (flange) as a lens.

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2 answers
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How are focal lengths derived from camera calibration (resectioning) and pixel sensitive area related?

In camera calibration (camera resectioning process, e.g. camera calibration with OpenCV) does the result for focal lengths fx and fy depend on the photo-sensitive area inside the pixel ? If I have a ...
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2 votes
1 answer
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Geocoordinate calculation for aerial oblique image using camera and plane yaw, pitch, roll, and position data

I have a requirement to calculate the ground footprint for an aerial camera. The photos are TerraPhotos. TerraPhoto user guide provide camera position and plane orientation in .IML file. Additionally, ...
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20 votes
6 answers
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Why doesn't my pinhole image cover the film?

I am not sure why this image here resulted in a tiny circle on the 120 film. Why is it not covering more of the negative? The hole is about f/323. The film sits behind the hole about 73mm? I thought ...
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1 vote
2 answers
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Holga 120 WPC exposure times

I'm struggling to reconcile the recommended exposure times of a Holga 120 Wide Pinhole Camera as suggested by Holga, vs the values I am getting via an app like Pinhole Assist (or even when computing ...
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1 vote
2 answers
622 views

Why is the image plane at Z = f in pinhole camera models?

Can someone show me the mathematical interpretation of why the image plane is at Z = f in the pinhole camera model? I found a possibly useful formula in Wikipedia, as shown in the figure below: My ...
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3 votes
1 answer
959 views

The ideal pinhole camera has an infinite depth of field

What does it mean to say that the ideal pinhole camera has an "infinite depth of field"? According to Wikipedia, depth of field is "the distance between the nearest and the farthest objects that are ...
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7 votes
2 answers
467 views

Storing pinhole photos in the field

A Christmas quandary. I picked up one of those pinhole kits for my daughter (she isn't reading this) which includes a pack of paper, some photo chemistry, etc. etc. The paper needs to be loaded into ...
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1 vote
3 answers
737 views

Is there an instant film I can use for developing pinhole photos with high school students?

I'd like to make pinhole cameras as a project with my yearbook class. The camera looks easy to make. I'm worried about developing. Is there an instant film I can use, or should I make a little dark ...
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8 votes
3 answers
3k views

Will a pinhole camera work with instant film?

I am making a pinhole camera for a school science fair. Is it possible to use Instax Mini Film instead of the long process of developing photo paper? If so, would I use the same design, and just swap ...
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2 votes
1 answer
227 views

What is this fine grid on an image made using pinhole and Nikon D200?

I am a longtime photographer but not such an expert on the technical aspects of optics and digital sensors. I've been experimenting with my Nikon D200 and a home-made paper pinhole, coloured black on ...
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21 votes
3 answers
7k views

Why is the hole in a pinhole camera usually a circle?

I know that for pinhole cameras and camera obscuras the holes are usually round (they are circular). But I don't see the link between the shape of the hole and the formation of the image.
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1 vote
2 answers
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How does imaging plane's distance affect the picture in a pinhole camera?

I'm studying pinhole cameras and camera obscuras to better understand how light behaves and how pictures are created. I'm trying to understand how positioning the imaging plane ( I think of it as a ...
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3 votes
3 answers
430 views

Real world differences in pinhole sized apertures

I'm interested in experimenting with a pinhole camera and am considering the Ilford Obscura or Titan. The focal lengths are slightly different and not of concern for me. What I'm really interested ...
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9 votes
4 answers
3k views

All images are out of focus with pinhole body cap

I bought a "Rising" brand pinhole lens. It's a piece of drilled aluminum fixed to a body cap, the kind of plastic cap that covers the body when there's no lens attached. I have a Pentax K-50, and I ...
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2 votes
4 answers
647 views

How properly expose a long exposure in daylight?

I was shooting some lake waves with some nice color in them, and I wanted to do a long exposure to smooth out the wave and color, similar to the effect you see from a long exposure of whitewater or a ...
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1 vote
1 answer
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Resolution of a pinhole 'telescope' to observe Sun

As a follow-up to this question, I was thinking about how one might build a pinhole camera with extremely long focal length to photo the Sun with a DSLR. Imagine that pinhole is at the end of a long ...
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4 votes
3 answers
695 views

Can I combine a pinhole bodycap with macro extension tube to adjust focal length?

I'm interested in trying out a bodycap style pinhole on my DSLR (a Nikon D3300 in my case). Can I combine this with a macro extension tube to adjust the focal length? Calculators such as Mr Pinhole ...
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7 votes
3 answers
7k views

Concept of focus for a pinhole camera?

Is there a concept of "focus" and thereby defocus for a pinhole camera? If yes, then what is it? If it is assumed that only one ray of light enters in through the pinhole from every point on the scene,...
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4 votes
3 answers
3k views

How can I test that the image is inverted in a pinhole camera?

I learned that a pinhole camera inverts the image on the film strip: Is it to possible to test if the image gets inverted without the film strip on which the image is projected? For example: I made ...
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2 votes
2 answers
724 views

Developing pinhole camera photos - pictures turn cloudy

I recently made my first pinhole camera and started taking photos with it. It's a Illy coffe can camera with a 0.35 mm pinhole aperture. I am using an old pack of Ilfobrom FB IB2 photo paper. It's 17....
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1 vote
4 answers
854 views

What lens designs are sharper than a pinhole lens but also allow for multi-month exposures?

I have a homemade pinhole camera (film) that I use for taking super long exposures (multiple months). And while the results are fun, I would like to improve the sharpness of the image. Is diffraction ...
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5 votes
1 answer
482 views

Can I get Photographic Paper with lower ISO?

I have been playing around with pinhole cameras using photographic paper (instead of film). Great fun. But when I buy photographic paper, I don't seem to have any options for different ISOs, like I do ...
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-2 votes
1 answer
3k views

Easy DIY photo paper? [closed]

I have no film for my pinhole camara, and i can't buy any. how can i take easy safe photos? I can't buy anything. I WILL ACCEPT ANYTHING. EVEN LEAVES.
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0 votes
4 answers
372 views

Are there super-macro lenses for getting "inside"?

As a follow-on to the question How can one capture gun bore shots? I'm wondering how we can get a wide perspective inside a very small space. For example, I like this shot of a .45" barrel with a ...
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4 votes
1 answer
645 views

Medium / Large Format Pinhole Camera

I'd like to build a large format pinhole camera using photographic paper as the medium. I've found several articles and how-to guides for building small/medium format 4x5 pinhole cameras but nothing ...
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5 votes
2 answers
3k views

Where can I obtain direct positive paper?

I want to build a pinhole camera, make pictures straight onto paper and develop them myself. From my research online, it seems I need "direct positive" paper. Anywhere I look, I find Harman Direct ...
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12 votes
2 answers
12k views

How to calculate the optimal pinhole size?

As far as I've understood, optimal diameter for pinhole size is calculated by formula where d - the optimal diameter for pinhole c - constant f - focal length (distance between pinhole and ...
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6 votes
2 answers
613 views

Can extension tubes be used to zoom in in pinhole / zone plate photography?

In a recent question it was stated that You cannot change the focal length of the zone, it is fixed and a characteristic of the physical dimensions of the camera As far as I know, focal length of ...
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7 votes
2 answers
1k views

What are the challenges of creating a pinhole camera with short focal length?

I have found two challenges of creating a pinhole camera with short focal length (by focal length, I mean the distance from the pinhole to the film): Pinhole size: Short focal length means we need a ...
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2 votes
1 answer
173 views

How to set up a large pinhole photography competition?

I'm looking to set up a large pinhole photography competition in my city. This competition would be open to members of a small college within this city. The plan is to leave a number of pinhole ...
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17 votes
2 answers
3k views

How to take extremely long (multiple month) exposure photos?

Was just going through an article where it was mentioned that Michael Wesely took a photo of a building being destructed and constructed and the shutter was open for 34 months. How is it possible to ...
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10 votes
4 answers
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Whats the approximate aperture of a pinhole camera?

There are plenty of different pinholes you can make! Assuming I am being a little bit less creative and I am making a matchbox pinhole camera lens using a drawing pin in a sheet small sheet from an ...
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6 votes
5 answers
2k views

What's the difference between vignetting and pinhole?

Sometimes people say that a lens has bad vignetting but it looks very similar to the effect of pinhole (darkened edges). What's the difference? If someone asked to have a vignetting effect (in PP) ...
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6 votes
4 answers
1k views

Are there any pinhole "lenses" available from lens manufacturers?

I know that it is possible to make your own pinhole, but do lens manufacturer's make pinhole "lenses" that include aperture data, etc? If so, who makes them?
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7 votes
1 answer
689 views

How can I shoot wide angle zone plate photography?

I like the look that is possible with zone plate photography. I've google around a bit and it seems that pinhole and zone plate photography on a DSLR, especially a crop body DSLR, results in medium ...
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3 votes
2 answers
7k views

Why does depth of field occur?

I wonder why depth of field occur in the first place. This is not a question about what changes the effect/size of field. We all know that. Aperture, Focal Length, Focus Length (distance to subject), ...
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5 votes
4 answers
2k views

DIY pinhole lens' aperture is ƒ00, which can't be changed and pictures turn out mostly black

I just made a pinhole lens for my Canon EOS 1000D (Rebel XS), but now I have no idea what to do next. The bulb-mode is on and ISO is 400. Camera says the aperture is ƒ00, which I can't change. What ...
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10 votes
3 answers
2k views

Can a dSLR be safely made into a pinhole camera?

What exactly is pinhole camera? The wikipedia article says A pinhole camera is a simple camera without a lens and with a single small aperture — effectively a light-proof box with a small hole in ...
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