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05/22/2010 11:28:50 PM · #26 |
Originally posted by tehben:
Ok, so I made a bodycap pinhole lens this afternoon!
Here is a shot
20s exposure, 100 iso
I drilled like a 1/4 inch hole in the cap and then punched a hole in a piece of steel foil tape with a sewing pin and stuck it over the hole. |
Good start. Looks creepy and antiquated in a Sherlock Holmes kind of way. ;) I'm thinking Hound of the Baskervilles. |
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05/23/2010 10:42:19 AM · #27 |
Originally posted by bspurgeon:
Originally posted by tehben:
I have been meaning to make a pinhole lens with a body cap and I saw this!
The lenoxlazer website has a different cap for the canon rebel then the 10-30D... why is that? I have a 5D II.... |
Yeah, I know, I purchased it anyway and it works well. The cap is a bit tight. I think it has a focal length of about 50mm and about f/180. Any EOS body cap will work on your 5DII. |
I think that, in theory, the "correct" size for a pinhole aperture is influenced by how closely the receptors are packed on the sensor, because the packing affects the "circle of confusion" for that camera body. I doubt that it makes a heck of a lot of difference to us at the level we are working at. I could be wrong, but...
I'd like to participate in this, but I don't have a pinhole setup (though I do have a lens baby).
R.
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05/23/2010 10:49:56 AM · #28 |
Originally posted by Bear_Music:
I'd like to participate in this, but I don't have a pinhole setup ... |
Do you have oatmeal and a bathroom? |
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05/23/2010 12:15:28 PM · #29 |
Originally posted by Bear_Music:
I think that, in theory, the "correct" size for a pinhole aperture is influenced by how closely the receptors are packed on the sensor, because the packing affects the "circle of confusion" for that camera body. I doubt that it makes a heck of a lot of difference to us at the level we are working at. I could be wrong, but...
I'd like to participate in this, but I don't have a pinhole setup (though I do have a lens baby).
R. |
Actually, the parameters that affect optimal pinhole size are focal length and the wavelength of the light. Normally we assume 550nm for the wavelength green light), so FL is left as the only variable.
The equation, for those interested, is D= 1.9*sqrt(F*W) where D is the pinhole diameter in mm, F is the focal length in mm, and W is the wavelength in mm (use 0.00055). The focal length is the distance from the pinhole to the film or sensor plane.
Message edited by author 2010-05-23 12:15:41. |
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05/23/2010 02:09:53 PM · #30 |
Brian, how long did it take to make oatmeal box camera?
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05/23/2010 02:11:53 PM · #31 |
Originally posted by Bear_Music:
I'd like to participate in this, but I don't have a pinhole setup (though I do have a lens baby).
R. |
Shall we count you in? |
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05/23/2010 03:51:31 PM · #32 |
 .....
The Lumix TZ3 has a pinhole camera option. But I would like to try out my lensbaby. Count me in, plz. |
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05/23/2010 10:01:09 PM · #33 |
Originally posted by bspurgeon:
Brian, how long did it take to make oatmeal box camera? |
Making it is quite easy. I talked my sons through it in about an hour. But that was with gratuitous interjections of theory from me, and endless amounts of bickering and guffawing from them. If you have all the parts and supplies handy, you can can probably make one in about half an hour.
Shall I post digest instructions? |
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05/24/2010 01:08:04 AM · #34 |
Originally posted by pixelpig:
The Lumix TZ3 has a pinhole camera option. But I would like to try out my lensbaby. Count me in, plz. |
\
Good looking portraits; so this is a software effect? If so, in the spirit of the challenge, I'd like to keep it to any form of a pinhole camera. No offense, yeah? Look forward to your lensbaby images. (Maybe that's was your plan all along!) |
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05/24/2010 01:29:34 AM · #35 |
| This is probably a totally, totally dumb question, but, it's late, and I'm sitting here thinking ... what happens if you have 2 holes instead of only 1? Or 3? Do you get something like superimposed pictures? Or just even more blurry? Or what? Does anybody know? |
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05/24/2010 01:32:48 AM · #36 |
Originally posted by ursula:
This is probably a totally, totally dumb question, but, it's late, and I'm sitting here thinking ... what happens if you have 2 holes instead of only 1? Or 3? Do you get something like superimposed pictures? Or just even more blurry? Or what? Does anybody know? |
I don't know but it would be a curious experiment. All you need is a spare body cap to try it with and drill more than one hole. |
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05/24/2010 01:38:32 AM · #37 |
Originally posted by cpanaioti:
Originally posted by ursula:
This is probably a totally, totally dumb question, but, it's late, and I'm sitting here thinking ... what happens if you have 2 holes instead of only 1? Or 3? Do you get something like superimposed pictures? Or just even more blurry? Or what? Does anybody know? |
I don't know but it would be a curious experiment. All you need is a spare body cap to try it with and drill more than one hole. |
I think I'm going to try this, see what happens.
Message edited by author 2010-05-24 01:39:01. |
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05/24/2010 01:41:38 AM · #38 |
Add my name too please - I'll try to figure it all out.
ETA On reading the information, I realize I am not ready for this. So I'll just look in on the thread and see what everyone else comes up with.
Message edited by author 2010-05-24 20:09:29. |
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05/24/2010 01:44:04 AM · #39 |
Ursula, I would image the image will be sharper. It's like squinting for the nearsighted. Take a nearsighted person, for example, and put multiple pinholes in front of the eye, the vision will correct greatly.
ETA: The device is called a pinhole occluder.
Message edited by author 2010-05-24 01:45:16. |
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05/24/2010 01:57:32 AM · #40 |
Originally posted by ursula:
This is probably a totally, totally dumb question, but, it's late, and I'm sitting here thinking ... what happens if you have 2 holes instead of only 1? Or 3? Do you get something like superimposed pictures? Or just even more blurry? Or what? Does anybody know? |
I have been wondering the same thing myself.
Just ran out and tried it, 3 holes a mm apart in a triangle.
Message edited by author 2010-05-24 01:57:53. |
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05/24/2010 02:04:35 AM · #41 |
Originally posted by tehben:
I have been wondering the same thing myself.
Just ran out and tried it, 3 holes a mm apart in a triangle. |
Dizzying effect. Thanks for posting it.
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05/24/2010 07:43:07 AM · #42 |
Originally posted by tehben:
Originally posted by ursula:
This is probably a totally, totally dumb question, but, it's late, and I'm sitting here thinking ... what happens if you have 2 holes instead of only 1? Or 3? Do you get something like superimposed pictures? Or just even more blurry? Or what? Does anybody know? |
I have been wondering the same thing myself.
Just ran out and tried it, 3 holes a mm apart in a triangle.
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Something to try out during the month. Big holes, small holes, multiple holes.
One thing I'm going to try is making different shapes as holes. I want to try a star shape and slits, vertical and horizontal. I also want to try my new zoom, a straw. |
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05/24/2010 09:57:18 AM · #43 |
Originally posted by tehben:
Originally posted by ursula:
This is probably a totally, totally dumb question, but, it's late, and I'm sitting here thinking ... what happens if you have 2 holes instead of only 1? Or 3? Do you get something like superimposed pictures? Or just even more blurry? Or what? Does anybody know? |
I have been wondering the same thing myself.
Just ran out and tried it, 3 holes a mm apart in a triangle.
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Ahhh, 3 impressions at the same time! This is just up my line. Very interesting! |
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05/24/2010 10:17:22 PM · #44 |
Originally posted by Jac:
Something to try out during the month. Big holes, small holes, multiple holes.
One thing I'm going to try is making different shapes as holes. I want to try a star shape and slits, vertical and horizontal. I also want to try my new zoom, a straw. |
Far be it from me to discourage experimentation, but let me save you a bit of frustration. A too small pinhole will require longer exposure times and will render a fuzzy, low contrast image (my experience with digital, anyway). Larger holes might give you some interesting blur effects. Too large, though, and you'll just get a quickly overexposed frame. Don't bother with different shapes. Unless you have a laser, any shape you can cut out will be too large and won't render an image without optics. A straw, if completely light tight, will render a single point of light.
Do experiment with slits and multiple holes. Two razor blades are the way to go for a slit. Just like a pinhole, you want thin and sharp. Might be harder to work those on to a DSLR body cap. I did this with a slit and an oatmeal box:
PS: I responded to your comment here, Jac.
Message edited by author 2010-05-24 22:20:31. |
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05/24/2010 10:26:45 PM · #45 |
Originally posted by bvy:
...Do experiment with slits and multiple holes. Two razor blades are the way to go for a slit. Just like a pinhole, you want thin and sharp. Might be harder to work those on to a DSLR body cap. I did this with a slit and an oatmeal box:
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and I heartily second the razor blade tip, should have done something similar with my first try - next time I'm going to cut a (non-straight) line on a piece of metal shim, cutting the whole piece in half, then bring the pieces back together as close as possible and cover at the ends. I'll see if that works "better", although I'm personally perfectly happy with the results I got with my first mock-up. |
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05/25/2010 10:24:30 AM · #46 |
For anyone looking for tips on using the Lensbaby pinhole optic, I found this link.
//lensbaby.com/newsletter_archive/2009-05-28/
and forum banter on the subject
//www.lensbaby.com/forum/read.php?9,119575,126126
Message edited by author 2010-05-25 10:26:27. |
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05/25/2010 05:27:58 PM · #47 |
Originally posted by bvy:
Originally posted by Jac:
Something to try out during the month. Big holes, small holes, multiple holes.
One thing I'm going to try is making different shapes as holes. I want to try a star shape and slits, vertical and horizontal. I also want to try my new zoom, a straw. |
Far be it from me to discourage experimentation, but let me save you a bit of frustration. A too small pinhole will require longer exposure times and will render a fuzzy, low contrast image (my experience with digital, anyway). Larger holes might give you some interesting blur effects. Too large, though, and you'll just get a quickly overexposed frame. Don't bother with different shapes. Unless you have a laser, any shape you can cut out will be too large and won't render an image without optics. A straw, if completely light tight, will render a single point of light.
Do experiment with slits and multiple holes. Two razor blades are the way to go for a slit. Just like a pinhole, you want thin and sharp. Might be harder to work those on to a DSLR body cap. I did this with a slit and an oatmeal box:
PS: I responded to your comment here, Jac. |
Thanks Brian, much appreciated. You've saved me some time and maybe some frustration too. I'm going to try multiple slits that are very close together. Another idea is to have many tiny holes spread out evenly, like a salt shaker but a lot closer together. Can't wait to see the results even if they're not great. Experimenting is what's fun and the results are a bonus when they look good. :) |
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05/26/2010 03:35:09 PM · #48 |
This stuff is coool looking but I have no idea what it is.
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05/27/2010 02:53:14 PM · #49 |
Originally posted by JustCaree:
This stuff is coool looking but I have no idea what it is. |
//en.wikipedia.org/wiki/Pinhole_camera |
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05/28/2010 01:05:32 AM · #50 |
so if I am understanding this right... you basically cover your entire lens except for a small hole? set the shutter speed real slow and shoot?
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