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Anonymous
Anyone made your dslr into a pinhole?
any ideas on a good way to do this without ruining the body cap?
i tried it briefly last night and only got bluey black pictures and shit so i consider it a failure lol.
>> Anonymous
I have not but it seems like a cool thing to try out if you do get another lens cap.

and you can always reduce the blue with photoshop
>> Anonymous
yeah im thinking il just start looking for olympus body caps.
the blue was actually my wall and my white balance working against me.
>> Anonymous
you gonna have to realize the focal lenght,otherwise your project will fail
>> Anonymous
>>207901
explain
>> Anonymous
the pinhole will act as the lens.if you play around with pinholes in a darkened cardboard box and have a movable backboard to capture the image,then the distance of the backboard can be realized.the problem with using a slr for this is that the backboard (film) is fixed.i can only guess that the size of the pinhole should be calculated to get a clear image.
>> taken from wikipedia Anonymous
Generally, a smaller pinhole will result in better image resolution (sharper picture) as the projected circle of confusion is smaller at the image plane. An extremely small hole, however, can produce significant diffraction effects which will result in a less clear image due to the wave properties of light. Additionally, as the diameter of the hole approaches the thickness of the material in which it is punched, significant vignetting at the edges of the image will result, as less light will reach these areas. This is due to the shading effect of the sides of the hole for light coming in at other than a 90 degree angle.


The best pinhole is perfectly round (to minimise any higher-order diffraction effects off irregularites), and in an extremely thin piece of material. Industrially produced pinholes benefit from laser etching, but a hobbyist can still produce pinholes of sufficiently high quality for photographic work.
>> Anonymous
anyone have some experiance?
>> Anonymous
Google "pinhole calculator". There is a mathematical relationship between focal length and optimal pinhole size (where 'optimal' means 'producing the sharpest images'). The calculator will tell you that as well as what f number your pinhole is and the angle of view.