Pinhole image of a bridge in Bath – Somerset: I think.

A bridge in Bath – Somerset, I think.
Image scanned then adjusted for noise & contrast in P.S/CS6.

The problem with going through old files and negatives is finding forgotten and unidentifiable images. That is exactly what this is, all the negative page said was ‘Pinhole experiments’ with 35mm camera and body cap, it had several badly exposed and/or very blurred images but this one was the best.

I remember reading about the possibility of using a body cap drilled for a pinhole lens, but cannot find the modified cap since moving.

I do remember using the Nikon F4/Nikon F2Sb after making the lens from a drilled body cap which I then fitted with a disc made from very thin aluminium with a precisely centred hole. The ‘f’ stop was around f:200, calculated by using the following.

f-stop = focal length / aperture diameter

Figures estimated by using a ruler and dividers, was about 0.25 mm and the distance of the pinhole to film plane about 50 mm.

f-stop = 50 mm / 0.25 mm = 200.

For those who wondered what the symbol of a circle bisected by a line was on their SLR, it denotes the point of focus for images at infinity; the film plane.

The disc was sanded, cleaned in Isopropyl alcohol then glued onto the lens cap and all painted with matt black paint.

Why I have never carried on with these experiments I have no idea and the memory jog only came after looking at pinhole images posted on Kevin Allan’s excellent blog  Well worth visiting for his images and articles about cameras, materials & techniques.

5 thoughts on “Pinhole image of a bridge in Bath – Somerset: I think.

  1. Pinhole rocks!
    Great image, David!
    To be honest I can’t understand why people do pinhole from normal cameras. For me the fun is that I can shoot with a box or a can.

    1. I understand and agree, part of the beauty with pinhole images is the simplicity of obtaining images. In some ways that is the same with being able to just add a lens cap with a hole in it. It also means there is a choice (as long as you have a tripod with you) normal lens or pinhole on same length of film.

  2. I can not comment on the “technical” side, because in photography I am absolutely self-taught …
    But the impression of the photograph, it seems that the river enters the city and that further (but that we do not see it) it is a very different thing that we see

    1. It’s definitely not a composite, the river takes a left turn under the bridge then opens out again. The reason I was not sure it was Bath is because I cannot remember the date (Early 1990’s I think) but other negatives on the same page were of Pulteney bridge wier.

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