Pinhole – macro

I am thinking of doing some pinhole macro work.

Looking the internet up I found some interesting thoughts

If you draw a ray diagram you may see a problem if you bring it very close to your subject, and your film sensitivity curve isn’t narrow.

For one thing the material in which the hole is made would need to be very thin, or you’ll get some odd vignetting.

But also remember that pinhole does a very poor job of focusing different wavelengths to the same plane. As the subject gets closer to the pinhole, that issue should get more noticeable: rays containing all the colours will need to approach the pinhole from more extreme angles.

Hence my suggestion to use a film with a narrow sensitivity curve… it’d be best if it were sensitive to a single wavelength

Seems I will have to do some tests myself

2 Antworten auf „Pinhole – macro“

    1. Hi Aaron,

      I inherited a bunch of old films so I used them for pinhole. I prefer Ilford, usually with longer exposure times the
      reciprocity error (in german Schwarzschild effect) is a considerable factor. Ilford is here very managable, Fomapan is very difficult when using longer exp times.
      But if you want to increase contrast in summer reciprocity offers a way to go, and than Fomapan shines…

      Have fun,

      Gerhard

      In larger format I try x-ray at them moment, but exposure is guesswork with this film. But: you can develop under redlight and compensate the dev time.

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