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Nikon F-Mount Pinhole Lens

by kovo, published

Nikon F-Mount Pinhole Lens by kovo Apr 7, 2012

Description

This is a simple pinhole lens and cap attachment for a Nikon camera with an f-mount bayonet style mount.

Recent Comments

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There really isn't a benefit for visible light images like this, beyond aesthetics and photography fun. Pinhole lens have very large depths of field, but they tend to be blurry. But it is a neat, physicsy way to make an image.

At very short (e.g. x-ray) wavelengths, there are not many ways of forming images, since ordinary lenses don't work. But pinholes continue to form images, and are often used for that purpose. However, I have my doubts you could get enough x-ray flux conveniently to form an image on a commercial CC
D.

I used PLA, which I think is a little shinier than ABS. But you are quite right, a less reflective material inside would be a lot better.

Looks like you could have better results if you reduced the glossy finish of the black ABS (black cardboard?) in the inside to avoid light reflections.

Good job! I like it!!

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Instructions

This was inspired by thingiverse.com/thing:6831 designed by xjcrawler01. I couldn't get this thing to fit, so I designed my own in openSCAD so I could tweak and reprint.

This pinole lens fits on a Nikon camera (it worked on my D7000) like a regular lens. You affix a separately made pinhole over the small aperture using black electrical tape. A simple and easy, but very good pinhole can be made by the "beer can" method.

The parametric OpenSCAD files are included, along with some dependencies to use rotate_extrude to make arcs, and dependencies to make the Nikon male f-style bayonet mount. I also included the dependency for an female f-style bayonet mount. With this, and a little ingenuity, you could make extender tubes for a homemade macro lens, for instance. I will try to knock one of those up soon. I tested both mounts with my lens and camera. The designs come from my measurements, so you might need to tweek/sand a little for your camera.

"Beer can" method to make a pinhole
There is lots of good stuff on this on the web, so do a search. The basic method is to use a piece of aluminum from a beer can (say 1 cm x 1 cm). Use a punch or nail to make a small dent in the aluminum. Then sand the high side of the dent until a hole forms.

To take a picture
Put the camera on a tripod or table. Set the camera to manual, ISO to 100 or 200, and exposure time to 0.5 seconds if in bright sun, 2 or more seconds indoors. Better to use a remote if you have one. Adjust the exposure time and camera position until you get a picture you like.

There are tons of great resources on the web. So explore and enjoy!

DISCLAIMER
==========
Cameras are expensive, and this is not an authorized Nikon accessory. If you decide to print this thing, you use it at your own risk.

Comments

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aubenc on Apr 8, 2012 said:

Looks like you could have better results if you reduced the glossy finish of the black ABS (black cardboard?) in the inside to avoid light reflections.

Good job! I like it!!

kovo on Apr 8, 2012 said:

I used PLA, which I think is a little shinier than ABS. But you are quite right, a less reflective material inside would be a lot better.

QuantumConcepts on Apr 8, 2012 said:

Hmm, I don't get it - what's the benefit of a pin-hole lens like this?

kovo on Apr 8, 2012 said:

There really isn't a benefit for visible light images like this, beyond aesthetics and photography fun. Pinhole lens have very large depths of field, but they tend to be blurry. But it is a neat, physicsy way to make an image.

At very short (e.g. x-ray) wavelengths, there are not many ways of forming images, since ordinary lenses don't work. But pinholes continue to form images, and are often used for that purpose. However, I have my doubts you could get enough x-ray flux conveniently to form an image on a commercial CC
D.

aubenc on Apr 8, 2012 said:

I personally like to process the film however, I do see all the benefits of pinhole cameras without the need of having to do the "difficult" part.

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