Author Topic: [Theme] Pinhole photos  (Read 560 times)

Bent Hjarbo

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[Theme] Pinhole photos
« on: May 02, 2021, 14:49:03 »
I have done some experiments with "Beercan" lenses on my Z6, just had to try.
The beer can diameter fits snugly onto the camera lens mouth.
Hope you will go experimenting, I have seen some pinhole photos around on NG.

First picture the setup
Second is first test, next one where I tried to make the hole better.
Hole punched with a needle. The length is 11,5cm, so sort of short telephoto.

The picture quality is not as I would like it, the Nikker S series doet better  ;D

ColinM

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Re: [Theme] Pinhole photos
« Reply #1 on: May 02, 2021, 21:58:57 »
Nice project Bent.

I've seen some fascinating pinhole results when the exposures have been of the order of several days (I think these used photographic paper inside the cans). Not so easy to do with a valuable camera body attached.

Have you been able to try the effect of using different size pinholes?

Akira

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Re: [Theme] Pinhole photos
« Reply #2 on: May 02, 2021, 22:14:39 »
Bent, thank you for starting this [Theme] thread dedicated to the pinhole images.  Your initial images looks promising.

I have posted my pinhole images here quite sporadically.

FWIW, here is the link to the website of the pinhole specialist.  It is fun to browse through.

https://www.pinholephotography.org/
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Akira

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Re: [Theme] Pinhole photos
« Reply #3 on: May 02, 2021, 22:43:12 »
These were shot with a combo of Kenko pinhole and x0.45 wide converter.
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

Bent Hjarbo

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Re: [Theme] Pinhole photos
« Reply #4 on: May 02, 2021, 23:51:08 »
Akira, your photos looks a lot sharper than mine.
The holes I have made up to now have only been made by a needle, and a problem is the get the material flat again. And maybe also round enough.

Akira

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Re: [Theme] Pinhole photos
« Reply #5 on: May 03, 2021, 00:13:33 »
Akira, your photos looks a lot sharper than mine.
The holes I have made up to now have only been made by a needle, and a problem is the get the material flat again. And maybe also round enough.

Bent, my pinhole is made through a sophisticated process of the optics manufacturer.  It is made of an optical glass with some black coating etched to create a pinhole.  So, the optical quality of the pinhole should be very good.

A DIY pinhole should be tricky but more rewarding when you are successful with it.   ;)
"The eye is blind if the mind is absent." - Confucius

"Limitation is inspiration." - Akira

golunvolo

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Re: [Theme] Pinhole photos
« Reply #6 on: May 03, 2021, 00:31:42 »
Looks so much fun and with lovely and promising results

Erik Lund

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Re: [Theme] Pinhole photos
« Reply #7 on: May 03, 2021, 08:56:32 »
Add internal flocking inside the tube (can) to reduce flare and boost contrast.
Great Theme!
Pic is of me with my Tuborg Pinhole by JA on our 2011 Lofoten NikonGear workshop.
Pictures wit it are here:https://nikongear.net/revival/index.php?topic=162.msg984#msg984
Erik Lund

Bent Hjarbo

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Re: [Theme] Pinhole photos
« Reply #8 on: May 03, 2021, 10:19:06 »
The can pictured has some black cloth inside.

Erik Lund

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Re: [Theme] Pinhole photos
« Reply #9 on: May 03, 2021, 12:58:39 »
Yes, a Nikon lens cleaning cloth.
Erik Lund

mxbianco

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Re: [Theme] Pinhole photos
« Reply #10 on: May 03, 2021, 21:05:34 »
The pinhole camera has "infinite" DOF, as a matter of fact your tiny specks of dust on the sensor are in perfect focus (your pic #2), a beercan would also be a good tool for determining if your camera's sensor need cleaning. At normal lens operating apertures (below f/8) the specks are barely visible. A tiny pinhole will correspond to an aperture of f/128 or even smaller...

I like this thread!

To have a flat hole, you have to have a hard surface on the inside of the can when you punch the hole, the aluminum will yield at the punch point, but the material will stay flat and not be dragged inside the can (think of what a pistol bullet would do).

Ciao from Massimo
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Jack Dahlgren

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Re: [Theme] Pinhole photos
« Reply #11 on: May 04, 2021, 01:38:27 »
I used to make pinholes from thin brass. I'd make a dimple with a punch to thin it, polish that smooth, then pierce with a needle into a block of wood. Remove any burrs, hen insert the needle the other direction and twist a bit until it is round and smooth.

David H. Hartman

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Re: [Theme] Pinhole photos
« Reply #12 on: May 04, 2021, 04:34:23 »
Akira, your photos looks a lot sharper than mine.
The holes I have made up to now have only been made by a needle, and a problem is the get the material flat again. And maybe also round enough.

Do you sand the hole after puncturing the can? Shops that sell painting supplies for auto painting should sell 1000 to 3000 grit Wet/Dry sandpaper. This fine polishing sand paper might be ideal for dressing the pinhole after puncturing the can.

For blacking enlarging negative carriers I used VHT case paint. It adheres well to bare aluminum and stands up the abuse of hours of darkroom use. The can must be coated inside so I don't know how one might strip the coating away but once removed VHT case paint should be ideal. VH case paint might adhere to the coating inside the can?

Dave

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Oh no, must be the season of the witch!

Bent Hjarbo

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Re: [Theme] Pinhole photos
« Reply #13 on: May 04, 2021, 08:43:09 »
Do you sand the hole after puncturing the can? Shops that sell painting supplies for auto painting should sell 1000 to 3000 grit Wet/Dry sandpaper. This fine polishing sand paper might be ideal for dressing the pinhole after puncturing the can.

For blacking enlarging negative carriers I used VHT case paint. It adheres well to bare aluminum and stands up the abuse of hours of darkroom use. The can must be coated inside so I don't know how one might strip the coating away but once removed VHT case paint should be ideal. VH case paint might adhere to the coating inside the can?

Dave

Dave
I did sand the hole, but I still have some picture problems ;)