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).
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.
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.
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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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!)
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?
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.
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.
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.
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.
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.
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.
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.
Ahhh, 3 impressions at the same time! This is just up my line. Very interesting!
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:
...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:
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.
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:
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. :)
