Re: confusion re: pinholga

 The difference between f199 and f215 is roughly a 1/3 of a stop, if I
did my math right. Which is shouldn't be significant given the length of
the exposure. Maybe their suggestion will allow for slightly denser
negatives and account for any fall-off that might exist with the Holga.
What did your test results determine the aperture to be "exactly"? -thom

Shannon Stoney wrote:
> OK, I did that, and got f/199, just like the Pinhole Designer
> software said. Wonder why the Holga Mod guy says it's f/215?
>
> About the fuzziness: I have another pinhole camera that makes pretty
> sharp images. I thought that if the pinhole was the optimal size for
> the focal length, you were supposed to get relatively sharp images,
> compared to images where the pinhole is not optimal. (Sharp for a
> pinhole camera that is.)
>
> --shannon
>
>
> On May 22, 2007, at 11:59 PM, paul beard wrote:
>
>> On May 22, 2007, at 9:06 PM, Shannon Stoney wrote:
>>
>>> The website says that the pinholga has an aperture of .0079" or .
>>> 2010mm, and that is f/215.
>>
>> To find the f/stop, divide the focal length by the aperture. for
>> instance, I have a camera with a 118 mm focal length and a .4mm
>> aperture. That gives me an f/stop of 295. With a FL of 40 and an
>> aperture of .2, I make it about f/200.
>>
>>> So I am wondering: are my images going to be sort of fuzzy because
>>> the pinhole is not the optimal size?
>>
>> Well, they are pinhole images ;-)
>> --
>> Paul Beard
>> words: http://paulbeard.org/wordpress
>> pictures: http://www.flickr.com/photos/pdb206/
>> Are you trying to win an argument or solve a problem?
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Received on Wed May 23 07:30:04 2007